Sample records for airfield pavement evaluation

  1. Evaluation of airfield pavement evenness

    NASA Astrophysics Data System (ADS)

    Pietruszewski, Paweł; Poświata, Adam; Wesołowski, Mariusz

    2018-05-01

    The evenness of airfield pavements is one of the basic operating parameters, which characterize them. The evenness determines not only comfort of traffic along an airfield pavement, but also influences the size of dynamic effect on the pavement, hence, the safety of air operations. In addition, the evenness condition changing as a result of dynamic loads, adverse weather conditions or inappropriate airfield pavement construction technology, lead to deviations from the desired condition in the form of longitudinal and transverse unevenness. As a result, systematic and correct performance of tests is a very significant and required factor impacting the improvement of traffic safety on airfield pavements. If the data obtained through the measurements are not sufficiently reliable, they may consequently lead to making incorrect decisions, which can ultimately impact the safety of air operations.

  2. Evaluation of Precast Panels for Airfield Pavement Repair. Phase 2: Results of Accelerated Pavement Testing

    DTIC Science & Technology

    2013-09-01

    ER D C/ G SL T R -1 3 -2 4 Evaluation of Precast Panels for Airfield Pavement Repair Phase II: Results of Accelerated Pavement Testing...default. ERDC/GSL TR-13-24 September 2013 Evaluation of Precast Panels for Airfield Pavement Repair Phase II: Results of Accelerated Pavement ... pavement testing using a C-17 load cart to evaluate the performance of a precast portland cement concrete (PCC) pavement repair system. The system

  3. Evaluation of Procedures for Backcalculation of Airfield Pavement Moduli

    DTIC Science & Technology

    2015-08-01

    to develop pavement design and structural evaluation criteria, procedures, and software to ensure that its airfield pavements can support mission...aircraft. As tire pressures and aircraft weights have increased steadily during this time, the design and evaluation software– Pavement -Transportation...the remaining life for the pavement in terms of remaining pavement life (passes-to-failure) or allowable gross aircraft loads and also to design

  4. Development of Probabilistic Rigid Pavement Design Methodologies for Military Airfields.

    DTIC Science & Technology

    1983-12-01

    4A161102AT22, Task AO, Work Unit 009, "Methodology for Considering Material Variability in Pavement Design." OCE Project Monitor was Mr. S. S. Gillespie. The...PREFACE. .. ............................. VOLUME 1: STATE OF THE ART VARIABILITY OF AIRFIELD PAVEMENT MATERIALS VOLUME 11: MATHEMATICAL FORMULATION OF...VOLUME IV: PROBABILISTIC ANALYSIS OF RIGID AIRFIELD DESIGN BY ELASTIC LAYERED THEORY VOLUME I STATE OF THE ART VARIABILITY OF AIRFIELD PAVEMENT MATERIALS

  5. Rutting Performance of Cold-Applied Asphalt Repair Materials for Airfield Pavements

    DTIC Science & Technology

    2017-06-23

    susceptibility of hot mix asphalt (HMA) using the asphalt pavement analyzer (APA). Designation T340- 10. Washington, DC: American Association of State...ER D C/ G SL T R- 17 -1 0 Rutting Performance of Cold-Applied Asphalt Repair Materials for Airfield Pavements G eo te ch ni ca l a nd S...of Cold-Applied Asphalt Repair Materials for Airfield Pavements Ben C. Cox, John F. Rushing, and Web Floyd Geotechnical and Structures Laboratory

  6. Review of modern methods for continuous friction measurement on airfield pavements

    NASA Astrophysics Data System (ADS)

    Iwanowski, Paweł; Blacha, Krzysztof; Wesołowski, Mariusz

    2018-05-01

    The safety of traffic, including both road and air traffic on a ground manoeuvre area, depends on many factors. These mainly include the anti-slip properties of a road or airfield pavement on which the traffic takes place. The basic pavement parameter that determines its characteristics in terms of anti-slip properties is the skid resistance, which constitutes the ratio of the wheel downforce and the friction on the contact surface. There are currently many devices for continuous measurement of the skid resistance (Continuous Friction-Measuring Equipment - CFME) around the world. Most of them, in principle, do not vary much from one another. Most of the devices measure the measuring wheel’s downforce on the pavement and the friction on the wheel-pavement contact surface. The skid resistance is the result of this measurement. The devices vary in many aspects, such as the type and size of the used measuring tyre, pavement-wheel slip or tyre pressure. This does not mean that the results obtained from various devices mbe directly compared. On the other hand, each device allows determining the pavement’s anti-slip conditions in terms of the requirements specified for the given type of devices, thereby enabling pavement classification in these terms. The classification allows for comparing the results obtained from various measuring devices. The paper presents an overview of equipment used in Poland and around the world to measure the skid resistance on airfield pavements. The authors draw attention to the requirements for pavements in terms of their roughness, with division into road and airfield pavements.

  7. Low Shrinkage Cement Concrete Intended for Airfield Pavements

    NASA Astrophysics Data System (ADS)

    Małgorzata, Linek

    2017-10-01

    The work concerns the issue of hardened concrete parameters improvement intended for airfield pavements. Factors which have direct or indirect influence on rheological deformation size were of particular interest. The aim of lab testing was to select concrete mixture ratio which would make hardened concrete less susceptible to influence of basic operating factors. Analyses included two research groups. External and internal factors were selected. They influence parameters of hardened cement concrete by increasing rheological deformations. Research referred to innovative cement concrete intended for airfield pavements. Due to construction operation, the research considered the influence of weather conditions and forced thermal loads intensifying concrete stress. Fresh concrete mixture parameters were tested and basic parameters of hardened concrete were defined (density, absorbability, compression strength, tensile strength). Influence of the following factors on rheological deformation value was also analysed. Based on obtained test results, it has been discovered that innovative concrete, made on the basis of modifier, which changes internal structure of concrete composite, has definitely lower values of rheological deformation. Observed changes of microstructure, in connection with reduced deformation values allowed to reach the conclusion regarding advantageous characteristic features of the newly designed cement concrete. Applying such concrete for airfield construction may contribute to extension of its operation without malfunction and the increase of its general service life.

  8. Design of the optical structure of airfield in-pavement LED runway edge lights

    NASA Astrophysics Data System (ADS)

    Ma, Xiaodan; Yang, Jianhong; Peng, Jun; Li, Lei

    2017-02-01

    Airfield lighting system is an important aiding system of civil aviation airport that guarantees the taking off, landing, taxiing of airplanes at night, with low visibility, or under other complicated weather conditions. In-pavement LED runway edge lights, with the highest degree of light intensity, are the most important lights for safe civil aviation and are most difficult to design within airfield lighting system. With LED as the source of light and the secondary optical design as the core, in light of basic laws of Fresnel loss and total reflection and the principles of edge-ray etendue conservation and the conservation of energy to design major optical elements as lens, prism of the lamp, the in-pavement LED runway edge lights design successfully solves the designing problem of high-power, high-intensity LED airfield lights with narrow beam angle at closed environment. This success is of great significance for the improvement of LED airfield lighting system in China.

  9. Certification Tests on Cold Patch Asphalt Repair Materials for Use in Airfield Pavements

    DTIC Science & Technology

    2010-06-01

    in Airfield Pavements Mariely Mejías-Santiago, Franciso del Valle Roldán, and Lucy P. Priddy Geotechnical and Structures Laboratory U.S. Army...28 Figure 19. Pavement structure in the test section...ERDC), Geotechnical and Structures Laboratory (GSL), Vicksburg, MS. The findings and recommendations presented in this report are based upon laboratory

  10. Concepts for the Development of a Nondestructive Testing and Evaluation System for Rigid Airfield Pavements.

    DTIC Science & Technology

    1985-11-01

    Aplications 19. ABTRACT (Continue on reverg if necemar and identify by block, number) This technical report develops a complete system for nondestructive...life of rigid airfield pavements. .04-. V UNLSSFED _ IRCURfTY LA MntP A’rION O THIIS PAGE NA PREFACE This report was submitted as a doctoral thesis to...Engineering and Services Laboratory, Tyndall AFB, Florida 32403. t This thesis is being published in its original format by this laboratory because

  11. Full-Scale Instrumented Evaluations of Multiple Airfield Matting Systems on Soft Soil to Characterize Permanent Deformation

    DTIC Science & Technology

    2016-06-01

    Development of a new design methodology for structural airfield mats. International Journal of Pavement Research and Tech- nology 3(3):102-109...load exerted by aircraft over a larger area. Six airfield matting systems of varying materials and designs were evaluated through the construction...position unless so designated by other authorized documents. DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR. ERDC/GSL

  12. Region Based CNN for Foreign Object Debris Detection on Airfield Pavement.

    PubMed

    Cao, Xiaoguang; Wang, Peng; Meng, Cai; Bai, Xiangzhi; Gong, Guoping; Liu, Miaoming; Qi, Jun

    2018-03-01

    In this paper, a novel algorithm based on convolutional neural network (CNN) is proposed to detect foreign object debris (FOD) based on optical imaging sensors. It contains two modules, the improved region proposal network (RPN) and spatial transformer network (STN) based CNN classifier. In the improved RPN, some extra select rules are designed and deployed to generate high quality candidates with fewer numbers. Moreover, the efficiency of CNN detector is significantly improved by introducing STN layer. Compared to faster R-CNN and single shot multiBox detector (SSD), the proposed algorithm achieves better result for FOD detection on airfield pavement in the experiment.

  13. Determine viscoelastic mechanical properties of warm mix asphalt (WMA)-reclaimed asphalt pavement (RAP) mixes under high stresses in air-field flexible pavements and its impact on design life.

    DOT National Transportation Integrated Search

    2014-06-01

    The introduction of larger aircrafts on flexible airfield pavements has led to a need for asphalt mixtures capable of sustaining such heavy : loads. This laboratory and analytical study investigated the mechanical responses of a number of modified as...

  14. Region Based CNN for Foreign Object Debris Detection on Airfield Pavement

    PubMed Central

    Cao, Xiaoguang; Wang, Peng; Meng, Cai; Gong, Guoping; Liu, Miaoming; Qi, Jun

    2018-01-01

    In this paper, a novel algorithm based on convolutional neural network (CNN) is proposed to detect foreign object debris (FOD) based on optical imaging sensors. It contains two modules, the improved region proposal network (RPN) and spatial transformer network (STN) based CNN classifier. In the improved RPN, some extra select rules are designed and deployed to generate high quality candidates with fewer numbers. Moreover, the efficiency of CNN detector is significantly improved by introducing STN layer. Compared to faster R-CNN and single shot multiBox detector (SSD), the proposed algorithm achieves better result for FOD detection on airfield pavement in the experiment. PMID:29494524

  15. Maintenance Operations Degradation of Airfield Pavement Markings

    DTIC Science & Technology

    2012-03-01

    polyurea . 1.4 Research Questions To answer the problem presented, several questions need to be addressed. The first is whether or not rubber...suitable for use on airfields.  Further research is required. Cyrus and Frierson 2006 Polyurea  The material showed poor performance in...evaluating polyurea and one evaluating polyester. Both studies were undertaken to evaluate the effectiveness of polyurea or polyester as a potential

  16. Detecting of foreign object debris on airfield pavement using convolution neural network

    NASA Astrophysics Data System (ADS)

    Cao, Xiaoguang; Gu, Yufeng; Bai, Xiangzhi

    2017-11-01

    It is of great practical significance to detect foreign object debris (FOD) timely and accurately on the airfield pavement, because the FOD is a fatal threaten for runway safety in airport. In this paper, a new FOD detection framework based on Single Shot MultiBox Detector (SSD) is proposed. Two strategies include making the detection network lighter and using dilated convolution, which are proposed to better solve the FOD detection problem. The advantages mainly include: (i) the network structure becomes lighter to speed up detection task and enhance detection accuracy; (ii) dilated convolution is applied in network structure to handle smaller FOD. Thus, we get a faster and more accurate detection system.

  17. Airfield construction (3rd revised and enlarged edition)

    NASA Astrophysics Data System (ADS)

    Goretskii, Leonid I.; Boguslavskii, Adol'f. M.; Serebrenikov, Vadim A.; Barzdo, V. I.; Leshchitskaia, T. P.; Polosin-Nikitin, S. M.

    The principal engineering aspects of airfield construction are discussed. In particular, attention is given to the fundamental principles and organizational aspects of airfield construction; excavation work and airfield layout; construction of drainage systems; foundations and pavements; and quality control and safety engineering. The discussion also covers the operation of various support plants, including concrete production and mixing, production of asphalt-concrete mixtures and organic binders, production of structural steel and reinforced concrete components, and operation of stone quarries and gravel pits.

  18. Performance Prediction Relationships for AM2 Airfield Matting Developed from Full-Scale Accelerated Testing and Laboratory Experimentation

    DTIC Science & Technology

    2018-01-01

    work, the prevailing methods used to predict the performance of AM2 were based on the CBR design procedure for flexible pavements using a small number...suitable for design and evaluation frameworks currently used for airfield pavements and matting systems. DISCLAIMER: The contents of this report...methods used to develop the equivalency curves equated the mat-surfaced area to an equivalent thickness of flexible pavement using the CBR design

  19. Joint Rapid Airfield Construction (JRAC) 2007 Technology Demonstration

    DTIC Science & Technology

    2008-07-01

    ER D C/ G SL T R- 08 -1 7 Joint Rapid Airfield Construction (JRAC) 2007 Technology Demonstration Gary L. Anderton, Ernest S. Berney IV...Technology Demonstration Gary L. Anderton, Ernest S. Berney IV, Travis A. Mann, J. Kent Newman, E. Alex Baylot, Daniel K. Miller, and Quint Mason... Berney IV, Dr. J. Kent Newman, Daniel K. Miller, Quint Mason, Airfields and Pavements Branch (APB), and E. Alex Baylot, Mobility Systems Branch. The

  20. Precast concrete pavement - systems and performance review

    NASA Astrophysics Data System (ADS)

    Novak, Josef; Kohoutková, Alena; Křístek, Vladimír; Vodička, Jan

    2017-09-01

    Long-term traffic restrictions belong to the key disadvantages of conventional cast-in-plane concrete pavements which have been used for technical structures such as roads, parking place and airfield pavements. As a consequence, the pressure is put on the development of such systems which have short construction time, low production costs, long-term durability, low maintenance requirements etc.. The paper presents the first step in the development of an entirely new precast concrete pavement (PCP) system applicable to airfield and highway pavements. The main objective of the review of PCP systems is to acquire a better understanding of the current systems and design methods used for transport infrastructure. There is lack of information on using PCP systems for the construction of entirely new pavements. To most extensive experience is dated back to the 20th century when hexagonal slab panels and system PAG were used in the Soviet Union for the military airfields. Since cast-in-situ pavements became more common, the systems based on precast concrete panels have been mainly utilized for the removal of damaged sections of existing structures including roads, highways etc.. Namely, it concerns Fort Miller Super Slab system, Michigan system, Uretek Stitch system and Kwik system. The presented review indicates several issues associated with the listed PCP systems and their applications to the repair and rehabilitation of existing structures. Among others, the type of manufacturing technology, particularly the position of slots for dowel bars, affects the durability and performance of the systems. Gathered information serve for the development of a new system for airfield and highway pavement construction.

  1. An Evaluation of the Pavement Condition Index Prediction Model for Rigid Airfield Pavements

    DTIC Science & Technology

    1982-09-01

    UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGO(I*%A Data Entotoi) The United States Army Corps of Engineers, Construction Engineering Research Laboratory...Condition . . . 31 Pavement Design/ Construction ....... . 82 Aircraft Traffic ........ .............. 82 Climate Conditions ........ ............. 84...PATTERSON AFB . . . . . . . . . . . . . . . . . . . . . . . . . 155 C. DATA OBTAINED FROM THE CONSTRUCTION ENGINEERING RESEARCH LABORATORY. .. .. 168 D

  2. Field Performance of Fiber-Reinforced Concrete Airfield Pavements.

    DTIC Science & Technology

    1986-07-01

    were less severe at some fiver-reinforced concrete pavements at JFK airport in New York than at some of the other airports. The pavements at JFK ... airport did use a poly- ethylene sheet as a bond breaker between the fiber-reinforced overlay and base pavement. This may have helped reduce frictional

  3. Engineering properties of resin modified pavement (RMP) for mechanistic design

    NASA Astrophysics Data System (ADS)

    Anderton, Gary Lee

    1997-11-01

    The research study described in this report focuses on determining the engineering properties of the resin modified pavement (RMP) material relating to pavement performance, and then developing a rational mechanistic design procedure to replace the current empirical design procedure. A detailed description of RMP is provided, including a review of the available literature on this relatively new pavement technology. Field evaluations of four existing and two new RMP project sites were made to assess critical failure modes and to obtain pavement samples for subsequent laboratory testing. Various engineering properties of laboratory-produced and field-recovered samples of RMP were measured and analyzed. The engineering properties evaluated included those relating to the material's stiffness, strength, thermal properties, and traffic-related properties. Comparisons of these data to typical values for asphalt concrete and portland cement concrete were made to relate the physical nature of RMP to more common pavement surfacing materials. A mechanistic design procedure was developed to determine appropriate thickness profiles of RMP, using stiffness and fatigue properties determined by this study. The design procedure is based on the U.S. Army Corps of Engineers layered elastic method for airfield flexible pavements. The WESPAVE computer program was used to demonstrate the new design procedure for a hypothetical airfield apron design. The results of the study indicated that RMP is a relatively stiff, viscoelastic pavement surfacing material with many of its strength and stiffness properties falling between those of typical asphalt concrete and portland cement concrete. The RMP's thermal and traffic-related properties indicated favorable field performance. The layered elastic design approach appeared to be a reasonable and practical method for RMP mechanistic pavement design, and this design procedure was recommended for future use and development.

  4. Using Value-Focused Thinking to Evaluate the Practicality of Porous Pavement Parking Areas on Air Force Installations

    DTIC Science & Technology

    2006-03-01

    data for conventional systems was obtained mainly through the RS Means Assemblies Cost Data book (Balboni, 2005) while Bruce Ferguson’s Porous...Pavements book provided much of the information for porous systems (Ferguson, 2005). Additional information regarding pavement maintenance, inspection...Jacobs, M. M. J., Stet, M. J. A., & Molenaar , A. A. A. (2002). Decision model for the use of polymer modified binders in asphalt concrete for airfields

  5. Refinement of Foam Backfill Technology for Expedient Airfield Damage Repair- Phase I: Laboratory Evaluation of Foam Materials

    DTIC Science & Technology

    2016-11-01

    the spring of 2016. Four of these materials were commercially available. The remaining formulations were designed specifically to support this... designated by other authorized documents. DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE ORIGINATOR. ERDC TR-16-16 iii...The Program Manager was Jeb S. Tingle, ERDC-GSL. This work was performed by the Airfields and Pavements Branch (GMA) of the Engineering Systems

  6. Aquatic toxicity of airfield-pavement deicer materials and implications for airport runoff.

    PubMed

    Corsi, Steven R; Geis, Steven W; Bowman, George; Failey, Greg G; Rutter, Troy D

    2009-01-01

    Concentrations of airfield-pavement deicer materials (PDM) in a study of airport runoff often exceeded levels of concern regarding aquatic toxicity. Toxicity tests on Vibrio fischeri, Pimephales promelas, Ceriodaphnia dubia, and Pseudokirchneriella subcapitata (commonly known as Selenastrum capricornutum) were performed with potassium acetate (K-Ac) PDM, sodium formate (Na-For) PDM, and with freezing-point depressants (K-Ac and Na-For). Results indicate that toxicity in PDM is driven by the freezing-point depressants in all tests except the Vibrio fisheri test for Na-For PDM which is influenced by an additive. Acute toxicity end points for different organisms ranged from 298 to 6560 mg/L (as acetate) for K-Ac PDM and from 1780 to 4130 mg/L (as formate) for Na-For PDM. Chronic toxicity end points ranged from 19.9 to 336 mg/L (as acetate) for K-Ac PDM and from 584 to 1670 mg/L (as formate) for Na-For PDM. Sample results from outfalls at General Mitchell International Airport in Milwaukee, WI (GMIA) indicated that 40% of samples had concentrations greater thanthe aquatic-life benchmarkfor K-Ac PDM. K-Ac has replaced urea during the 1990s as the most widely used PDM at GMIA and in the United States. Results of ammonia samples from airport outfalls during periods when urea-based PDM was used at GMIA indicated that 41% of samples had concentrations exceeding the U.S. Environmental Protection Agency (USEPA) 1-h water-quality criterion. The USEPA 1-h water-quality criterion for chloride was exceeded in 68% of samples collected in the receiving stream, a result of road-salt runoff from urban influence near the airport. Results demonstrate that PDM must be considered to comprehensively evaluate the impact of chemical deicers on aquatic toxicity in water containing airport runoff.

  7. Aquatic toxicity of airfield-pavement deicer materials and implications for airport runoff

    USGS Publications Warehouse

    Corsi, S.R.; Geis, S.W.; Bowman, G.; Failey, G.G.; Rutter, T.D.

    2009-01-01

    Concentrations of airfield-pavement deicer materials (PDM) in a study of airport runoff often exceeded levels of concern regarding aquatic toxicity. Toxicity tests on Vibrio fischeri, Pimephales promelas, Ceriodaphnia dubia, and Pseudokirchneriella subcapitata (commonly known as Selenastrum capricornutum) were performed with potassium acetate (K-Ac) PDM, sodium formate (Na-For) PDM, and with freezing- point depressants (K-Ac and Na-For). Results indicate that toxicity in PDM is driven by the freezing-point depressants in all tests except the Vibrio fisheri test for Na-For PDM which is influenced by an additive. Acute toxicity end points for different organisms ranged from 298 to 6560 mg/L (as acetate) for K-Ac PDM and from 1780 to 4130 mg/L (as formate) for Na- For PDM. Chronic toxicity end points ranged from 19.9 to 336 mg/L (as acetate) for K-Ac PDM and from 584 to 1670 mg/L (as formate) for Na-For PDM. Sample results from outfalls at General Mitchell International Airport in Milwaukee, Wl (GMIA) indicated that 40% of samples had concentrations greater than the aquatic-life benchmark for K-Ac PDM. K-Ac has replaced urea during the 1990s as the most widely used PDM at GMIA and in the United States. Results of ammonia samples from airport outfalls during periods when urea-based PDM was used at GMIA indicated that41% of samples had concentrations exceeding the U.S. Environmental Protection Agency (USEPA) 1 -h water-quality criterion. The USEPA 1-h water-quality criterion for chloride was exceeded in 68% of samples collected in the receiving stream, a result of road-salt runoff from urban influence near the airport. Results demonstrate that PDM must be considered to comprehensively evaluate the impact of chemical deicers on aquatic toxicity in water containing airport runoff. ?? 2009 American Chemical Society.

  8. A Knowledge-Base for Rehabilitation of Airfield Concrete Pavements

    DTIC Science & Technology

    1991-01-01

    pavement engineer is located at a Major Command which oversees the operation of several Air Force bases. The five largest commands are the Strategic Air... Strategic Air Command (SAC) pavement engineer at Offutt AFB, NE 1980 - 1982: COE Materials & Concrete Division (MRD) Laboratory engineer 1976 - 1980...LaFrenz TITLE OR POSITION: Strategic Air Command Pavement Engineer PHONE: MAIL ADDRESS: HQ SAC/DEM Offutt AFB, NE YEARS IN CURRENT ASSIGNMENT: 2 EXPERIENCE

  9. Evaluation and Response of Aged Flexible Airfield Pavements at Ambient Temperatures Using the Falling Weight Deflectometer

    DTIC Science & Technology

    1988-01-01

    named in 2 and 3 above 5. Raveling and Weathering Deterioration Asphalt hardening Time 6. Disintergration Stripping--loss of bond Chemical reactivity...two chapters. 3.2.4 Construction History The existing airfield is the product of several construction and repair projects (88). Initial construction

  10. Optimization of Long Range Major Rehabilitation of Airfield Pavements.

    DTIC Science & Technology

    1983-01-01

    the network level, the mathematical representation of choosing those projects that maximize the sum of the user value weighted structural performanceof ...quantitatively be compared . In addition, an estimate of an appropriate level of funding for the entire system can be made. The simple example shows a...pavement engineers to only working in the present. The designing and comparing of pavement maintenance and rehabilitation alternatives remain directed

  11. Material Handling Equipment Evaluation for Crater Repair

    DTIC Science & Technology

    2016-11-01

    Department of the Army position unless so designated by other authorized documents. DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT RETURN IT TO THE...project. Jeb. S. Tingle was the ERDC Airfield Damage Repair program manager. The work was performed by the Airfields and Pavement Branch (GMA) of the...USAF’s) ability to perform airfield pavement repair tasks to support the operation of modern aircraft for a variety of mission scenarios. The ADR

  12. Full-Scale Accelerated Pavement Testing of Warm-Mix Asphalt (WMA) for Airfield Pavements

    DTIC Science & Technology

    2014-01-01

    software and Pavement Engineering Utility (PSEVEN) were used 50 ft 65 ft 130 ft 24 ft Item 3 Sasobit ® Item 4 Evotherm 3G Item 1 HMA... Evotherm 3G Air Top Mid-depth Bottom Target temperature = 109 ºF ERDC/GSL TR-14-3 25 The target pavement temperature for this study was 109 ºF, and it is...the locations of the I-buttons and their layout in relation to the vents. 90 95 100 105 110 115 120 HMA Foamed Asphalt Sasobit Evotherm 3G Av er ag e

  13. Investigation on the Use of Equivalency Factors for the Design and Evaluation of Flexible Airfield Pavements

    DTIC Science & Technology

    2014-03-27

    Operations on Alternate Launch and Recovery Surfaces (No. ESL -TR-83-46). Tyndall Air Force Base, FL: Air Force Engineering and Services Center. U.S...Little, D. N., Thompson, M. R., Terrell, R. L., Epps, J. A., & Barenberg, E. J. (1987). Soil Stabilization for Roadways and Airfields (No. ESL -TR...Alternate Launch and Recovery Surfaces (No. ESL -TR-83-46). Tyndall Air Force Base, FL: Air Force Engineering and Services Center. U.S. Army Corps of

  14. Pervious Pavement System Evaluation-Poster

    EPA Science Inventory

    Pervious pavement is a low impact development stormwater control. The Environmental Protection Agency's Urban Watershed Management Branch is evaluating interlocking concrete pavingstone pervious pavement systems. The pavingstones themselves are impermeable, but the spaces between...

  15. Evaluation of pavement marking performance.

    DOT National Transportation Integrated Search

    2008-06-01

    The objective of the investigation was to evaluate the useful life of pavement markings. The Manual on Uniform Traffic Control Devices (MUTCD) provides general guidelines for the application and installation of pavement markings. However, performance...

  16. Enhancing GDOT's Computerized Pavement Condition Evaluation System for Pavement Condition Survey

    DOT National Transportation Integrated Search

    2017-09-01

    The Computerized Pavement Condition Evaluation System (COPACES) is a software tool that has been used by the Georgia Department of Transportation (GDOT) for its statewide pavement condition survey since the late 1990s. The previous version was releas...

  17. Pervious Pavement System Evaluation-Paper

    EPA Science Inventory

    The use of a pervious pavement can be effective as a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete paver systems as a type of porous pavement. Although the pavers are impermeable, the spaces between the pave...

  18. Engineering Properties of Resin Modified Pavement (RMP) for Mechanistic Design

    DTIC Science & Technology

    2000-03-01

    conducted by personnel of the Airfields and Pavements Division (APD), Geotechnical Laboratory (GL), ERDC, Vicksburg, MS, during the period October 1995...mixture and resin modified portland cement grout are produced and placed separately . The RMP is typically a 50-mm-thick layer placed on top of a...military installations in the following years. The Federal Aviation Administration, also eager to develop an alternative paving material technology

  19. Oxygen demand of aircraft and airfield pavement deicers and alternative freezing point depressants

    USGS Publications Warehouse

    Corsi, Steven R.; Mericas, Dean; Bowman, George

    2012-01-01

    Aircraft and pavement deicing formulations and other potential freezing point depressants were tested for biochemical oxygen demand (BOD) and chemical oxygen demand (COD). Propylene glycol-based aircraft deicers exhibited greater BOD5 than ethylene glycol-based aircraft deicers, and ethylene glycol-based products had lower degradation rates than propylene glycol-based products. Sodium formate pavement deicers had lower COD than acetate-based pavement deicers. The BOD and COD results for acetate-based pavement deicers (PDMs) were consistently lower than those for aircraft deicers, but degradation rates were greater in the acetate-based PDM than in aircraft deicers. In a 40-day testing of aircraft and pavement deicers, BOD results at 20°C (standard) were consistently greater than the results from 5°C (low) tests. The degree of difference between standard and low temperature BOD results varied among tested products. Freshwater BOD test results were not substantially different from marine water tests at 20°C, but glycols degraded slower in marine water than in fresh water for low temperature tests. Acetate-based products had greater percentage degradation than glycols at both temperatures. An additive component of the sodium formate pavement deicer exhibited toxicity to the microorganisms, so BOD testing did not work properly for this formulation. BOD testing of alternative freezing point depressants worked well for some, there was little response for some, and for others there was a lag in response while microorganisms acclimated to the freezing point depressant as a food source. Where the traditional BOD5 test performed adequately, values ranged from 251 to 1,580 g/kg. Where the modified test performed adequately, values of BOD28 ranged from 242 to 1,540 g/kg.

  20. Evaluation of experimental flexible pavements : final report.

    DOT National Transportation Integrated Search

    1979-01-01

    The construction and performance of seven Virginia flexible pavements containing at least some experimental features were evaluated. The objective was to evaluate the performance of the pavements incorporating new or timely design concepts and to ass...

  1. MoDOT pavement preservation research program volume IV, pavement evaluation tools-data collection methods.

    DOT National Transportation Integrated Search

    2015-10-01

    The overarching goal of the MoDOT Pavement Preservation Research Program, Task 3: Pavement Evaluation Tools Data : Collection Methods was to identify and evaluate methods to rapidly obtain network-level and project-level information relevant to :...

  2. Marginal Aggregates in Flexible Pavements: Field Evaluation

    DOT National Transportation Integrated Search

    1998-04-01

    The purpose of this study was to evaluate the utilization of substandard or marginal aggregates in flexible pavement construction of airport pavements. This investigation was undertaken to evaluate the effects of using lower quality aggregates such a...

  3. Refinement of Foam Backfill Technology for Expedient Airfield Damage Repair; Phase 2: Development of Prototype Foam Dispensing Equipment and Improved Tactics, Techniques and Procedures

    DTIC Science & Technology

    2017-12-01

    respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other...2 2 Prototype Equipment Design ...Program Manager was Mr. Jeb S. Tingle. This work was performed by the Airfields and Pavements Branch (APB) of the Engineering Systems and Materials

  4. Evaluation of various hot mix asphalt pavement thicknesses over rubblized concrete pavement.

    DOT National Transportation Integrated Search

    2011-07-01

    In 1999, the Wisconsin DOT constructed two test sections as part of a rubblized PCC pavement project on I-39 to evaluate whether : increased HMA thickness could extend the pavement system's service life. Design thicknesses of the control and test sec...

  5. Improving Distribution of Military Programs’ Technical Criteria

    DTIC Science & Technology

    1993-08-01

    Vacuum System ETL 1110-3-380 01/29/88 Std Distribution of Military Arfid Pavement Dsg ETL 1110-3-381 01/29/88 Airfield Pavement Design ETL 1110-3...Army Arfid O&M Facilities TM 5-825-2 08/01/78 Flexible Pavement Design for Airfields TM 5-825-2-1 11/01/89 Army Airfields Pavements, Flex (Appendix

  6. PCC Airfield Pavement Response During Thaw-Weakening Periods: A Field Study

    DOT National Transportation Integrated Search

    1996-05-01

    This investigation is part of the Cold Regions Research and Engineering Laboratory's (CRREL) on-going characterization of pavement performance in seasonal frost areas. As part of the research, CRREL conducted several field studies for the Federal Avi...

  7. Airport pavement marking evaluation for reducing runway incursion

    DOT National Transportation Integrated Search

    2001-02-01

    This study was undertaken to evaluate the widening of airport pavement marking in order to enhance their recognition. Results of this evaluation are aimed at reducing the potential of runway incursions and incidents by making airports pavement markin...

  8. The Movement Control Battalions Role in Airfield Operations

    DTIC Science & Technology

    2016-05-17

    stationed in Liberia, no senior Air Force officer was there to assume the role of the senior airfield au- thority ( SAA ). Army Field Manual 3–04.300...Airfield and Flight Oper- ations Procedures, says that the joint force commander should designate an SAA for each airfield in order to ensure unity...of effort for airfield op- erations being conducted at a foreign airfield. The SAA is “responsible for the control, operation, and mainte- nance of

  9. Evaluation of full depth asphaltic concrete pavements : final report.

    DOT National Transportation Integrated Search

    1982-10-01

    the aim of this study was to evaluate the full depth asphaltic concrete pavement design concept by observing the performance characteristics of two 13-inch pavements constructed in 1970. Pavement performance measurements, over an 11-year period, incl...

  10. Pervious Pavement System Evaluation

    EPA Science Inventory

    Porous pavement is a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete pavers as a popular implementation. The pavers themselves are impermeable, but the spaces between the pavers are backfilled with washed, grade...

  11. Evaluation of experimental flexible pavements : interim report no. 2.

    DOT National Transportation Integrated Search

    1975-01-01

    A program of construction and performance evaluation of seven Virginia flexible pavements containing at least some experimental features is reported. The objective of the program is to evaluate the performance of the pavements incorporating new or ti...

  12. Pervious Pavement System Evaluation

    EPA Science Inventory

    Pervious pavement is a low impact development stormwater control. The Urban Watershed Management Branch of the U.S. Environmental Protection Agency in Edison, NJ, is evaluating concrete pavers as a popular implementation. The pollutant removal of a bench-scale permeable interlo...

  13. Subsurface condition evaluation for asphalt pavement preservation treatments.

    DOT National Transportation Integrated Search

    2013-04-01

    This report presents a case study on the SR70 section with microsurface for understanding its performance; a development of a : methodology for evaluating the asphalt pavement subsurface condition for applying pavement preservation treatments; and...

  14. An integrated pavement data management and feedback system (PAMS) : evaluation of pavement condition rating procedure.

    DOT National Transportation Integrated Search

    1984-08-01

    This report describes an evaluation of a method for use in the Highway Needs Study pavement condition rating. The methods by which the Department generates and manages pavement condition data in the overall process of providing a network of highways ...

  15. Development of a Pavement Maintenance Management System. Volume 9. Development of Airfield Pavement Performance Prediction Models.

    DTIC Science & Technology

    1984-05-01

    materials, traffic, and climate, were used to develop PCI and key distress prediction models for both asphalt-concrete- and jointed-concrete- surfaced...Predicted PCI for PCC and AC/PCC Pavements Using Model Presented in Section III ...... 35 31 Effect of PCC Thickness on the PCI as a Function of Age...of Corner Breaking Observed vs Predicted Percent of Corner Breaking Using Model Presented in Section III

  16. Evaluation of Asphalt Pavement Analyzer for HMA Design

    DOT National Transportation Integrated Search

    1999-06-01

    Rutting is a common problem in hot mix asphalt pavements, particularly in hot climates and at intersections. The Asphalt Pavement Analyzer (APA) is a laboratory accelerated loading equipment that can be used to evaluate rutting potential of HMA. This...

  17. 48 CFR 252.236-7005 - Airfield safety precautions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 48 Federal Acquisition Regulations System 3 2011-10-01 2011-10-01 false Airfield safety... of Provisions And Clauses 252.236-7005 Airfield safety precautions. As prescribed in 236.570(b)(3.... Airfield Safety Precautions (DEC 1991) (a) Definitions. As used in this clause— (1) Landing areas means— (i...

  18. Geogrid Reinforced Base Course for Flexible Pavements for Light Aircraft: Literature Review and Test Section Design

    DTIC Science & Technology

    1991-05-01

    GeoarId Reinforced Agregate Layers over Weak Clay Subgrades. Milligan and Love(Z3) conducted small-scale laboratory model tests under plane strain...34. Based on the very limited literature available on geogrid applications in airfield pavements, the literature review was expanded to cover railroad...thicknesses and clay subgrade strengths. Performance of the reinforced systems was significantly better. The increased performance resulted from the

  19. The evaluation of pavement patching materials in Oregon : final report.

    DOT National Transportation Integrated Search

    1980-11-01

    This report describes the installation and evaluation of trial pavement patching materials in Oregon. The patches were placed in Portland cement concrete and bituminous concrete pavements and evaluated for periods ranging from four to twelve months. ...

  20. 40 CFR 449.2 - General definitions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... aircraft. This includes deicing and anti-icing fluids. Airfield pavement means all paved surfaces on the... defrosting or deicing for safe taxiing. Centralized deicing pad means a facility on an airfield designed for... remove or prevent any accumulation of snow or ice on: (1) An aircraft; or (2) Airfield pavement. Deicing...

  1. 40 CFR 449.2 - General definitions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... aircraft. This includes deicing and anti-icing fluids. Airfield pavement means all paved surfaces on the... defrosting or deicing for safe taxiing. Centralized deicing pad means a facility on an airfield designed for... remove or prevent any accumulation of snow or ice on: (1) An aircraft; or (2) Airfield pavement. Deicing...

  2. 40 CFR 449.2 - General definitions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... aircraft. This includes deicing and anti-icing fluids. Airfield pavement means all paved surfaces on the... defrosting or deicing for safe taxiing. Centralized deicing pad means a facility on an airfield designed for... remove or prevent any accumulation of snow or ice on: (1) An aircraft; or (2) Airfield pavement. Deicing...

  3. Evaluation of microcracking and chemical deterioration in concrete pavements.

    DOT National Transportation Integrated Search

    1995-10-31

    The major objective of this research project was to investigate the : chemistry and morphology of portland cement concrete pavements in : Iowa. The integrity of the various pavements was evaluated qualitatively, : based on the presence or absence of ...

  4. Pervious Pavement System Evaluation- Abstract

    EPA Science Inventory

    Porous pavement is a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete pavers as a popular implementation. The pavers themselves are impermeable, but the spaces between the pavers are backfilled with washed, gra...

  5. Product evaluation : bituminous pavement rejuvenator

    DOT National Transportation Integrated Search

    1986-07-03

    This report contains a product evaluation of K.A.E. Paving Consultant's Bituminous Pavement Rejuvenator (BPR). BPR is a coal tar product consisting of a low viscosity blend of aromatic oils designed to penetrate the asphalt, and rejuvenate and plasti...

  6. Evaluation of inlaid durable pavement markings in an Oregon snow zone.

    DOT National Transportation Integrated Search

    2006-04-01

    The Oregon Department of Transportation (ODOT) evaluated the use of inlaid durable pavement markings within a snow zone. Three different durable pavement marking products were installed and evaluated: Dura-Stripe, a methyl methacrylate; Permaline...

  7. Evaluation of concrete pavements with materials-related distress : final report.

    DOT National Transportation Integrated Search

    2010-03-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors : contributing to pavement distress observed in the field were determined, including expansive : alkali-silica reactivity and freeze-thaw deterioration related to poor ...

  8. Evaluation of consolidation in concrete pavements.

    DOT National Transportation Integrated Search

    1994-01-01

    Petrographic examinations of specimens from two recently constructed concrete pavements suggested that complete consolidation of the concrete may not have been achieved. Consequently, a quantitative evaluation of the degree of consolidation in these ...

  9. Developing a network-level structural capacity index for structural evaluation of pavements.

    DOT National Transportation Integrated Search

    2013-03-01

    The objective of this project was to develop a structural index for use in network-level pavement evaluation to facilitate : the inclusion of the pavements structural condition in pavement management applications. The primary goal of network-level...

  10. Evaluation of concrete pavements with materials-related distress : appendix G.

    DOT National Transportation Integrated Search

    2010-03-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors contributing to pavement distress observed in the field were determined, including expansive alkali-silica reactivity and freeze-thaw deterioration related to poor entr...

  11. Evaluation of recycled concrete as aggregate in new concrete pavements.

    DOT National Transportation Integrated Search

    2014-04-01

    This study evaluated the use of recycled concrete as coarse aggregate in new concrete pavements. : Recycled concrete aggregate (RCA) produced from demolished pavements in three geographically dispersed locations in Washington state were used to perfo...

  12. Evaluation of concrete pavements with materials-related distress : appendix F.

    DOT National Transportation Integrated Search

    2010-03-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors contributing to pavement distress observed in the field were determined, including expansive alkali-silica reactivity and freeze-thaw deterioration related to poor entr...

  13. Evaluation of concrete pavements with materials-related distress : appendix E.

    DOT National Transportation Integrated Search

    2010-03-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors contributing to pavement distress observed in the field were determined, including expansive alkali-silica reactivity and freeze-thaw deterioration related to poor entr...

  14. Evaluation of concrete pavements with materials-related distress : appendix D.

    DOT National Transportation Integrated Search

    2010-03-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors contributing to pavement distress observed in the field were determined, including expansive alkali-silica reactivity and freeze-thaw deterioration related to poor entr...

  15. Evaluation of concrete pavements with materials-related distress : appendix B.

    DOT National Transportation Integrated Search

    2010-02-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors contributing to pavement distress observed in the field were determined, including expansive alkali-silica reactivity and freeze-thaw deterioration related to poor entr...

  16. Evaluation of concrete pavements with materials-related distress : appendix C.

    DOT National Transportation Integrated Search

    2010-03-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors contributing to pavement distress observed in the field were determined, including expansive alkali-silica reactivity and freeze-thaw deterioration related to poor entr...

  17. Evaluation of concrete pavement patching techniques.

    DOT National Transportation Integrated Search

    1989-01-01

    This final report presents the results of a study undertaken to improve in concrete pavement patching techniques. Activities included an evaluation of the suitability of the impact hammer and maturity calculations for determining when a patch is read...

  18. Evaluation of linking pavement related databases.

    DOT National Transportation Integrated Search

    2007-03-01

    In general, the objectives of this study were to identify and solve various issues in linking pavement performance related database. The detailed objectives were: to evaluate the state-of-the-art in information technology for data integration and dat...

  19. Pervious Pavement System Evaluation- Abstract 1

    EPA Science Inventory

    Porous pavement is a low impact development stormwater control. The Urban Watershed Management Branch is evaluating interlocking concrete pavers as a popular implementation. The pavers themselves are impermeable, but the spaces between the pavers are backfilled with washed, gra...

  20. Nondestructive pavement evaluation using finite element analysis based soft computing models.

    DOT National Transportation Integrated Search

    2009-09-15

    Evaluating structural condition of existing, in-service pavements constitutes annually a major part of the : maintenance and rehabilitation activities undertaken by State Highway Agencies (SHAs). Accurate : estimation of pavement geometry and layer m...

  1. Theoretical Solution for Temperature Profile in Multi-layered Pavement Systems Subjected to Transient Thermal Loads

    DTIC Science & Technology

    2011-01-01

    kcal/mm s ◦C) Geopolymer paste 2.0x10−7 PCC slab 5.1x10−7 Thermal diffusivity, α (mm2/s) Geopolymer 0.2 PCC slab 1.3 for the surface layer of airfield...concrete pavements. Geopolymer materials have desirable properties for serving as an alternative binder to traditional Portland cement in producing...high thermal stability. Thus it is possible to construct paving concrete made from a geopolymer binder on top of the ordinary concrete slab to limit

  2. Evaluation of nondestructive evaluation methods for application in early detection Of deterioration in concrete pavements

    DOT National Transportation Integrated Search

    2000-01-01

    Three nondestructive evaluation (NDE) methods for concrete pavements - surface ultrasonic pulse velocity measurements (UPV), the impact-echo (IE) method, and the use of a seismic pavement analyzer (SPA) - were tested on six sections of two continuous...

  3. Evaluation of subgrade moduli for flexible pavements in Virginia : final report.

    DOT National Transportation Integrated Search

    1980-01-01

    Advances in pavement design technology in recent years have led to more dependence on mechanistic approaches and less reliance on subjective design criteria. In Virginia, the tendency is toward a pavement design and evaluation methodology based on el...

  4. 14 CFR 1204.1404 - Requests for use of NASA airfield facilities.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 5 2012-01-01 2012-01-01 false Requests for use of NASA airfield... ADMINISTRATIVE AUTHORITY AND POLICY Use of NASA Airfield Facilities by Aircraft Not Operated for the Benefit of the Federal Government § 1204.1404 Requests for use of NASA airfield facilities. (a) Request for use...

  5. 14 CFR 1204.1404 - Requests for use of NASA airfield facilities.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 5 2011-01-01 2010-01-01 true Requests for use of NASA airfield facilities... ADMINISTRATIVE AUTHORITY AND POLICY Use of NASA Airfield Facilities by Aircraft Not Operated for the Benefit of the Federal Government § 1204.1404 Requests for use of NASA airfield facilities. (a) Request for use...

  6. 14 CFR 1204.1404 - Requests for use of NASA airfield facilities.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 5 2013-01-01 2013-01-01 false Requests for use of NASA airfield... ADMINISTRATIVE AUTHORITY AND POLICY Use of NASA Airfield Facilities by Aircraft Not Operated for the Benefit of the Federal Government § 1204.1404 Requests for use of NASA airfield facilities. (a) Request for use...

  7. 14 CFR 1204.1404 - Requests for use of NASA airfield facilities.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 5 2010-01-01 2010-01-01 false Requests for use of NASA airfield... ADMINISTRATIVE AUTHORITY AND POLICY Use of NASA Airfield Facilities by Aircraft Not Operated for the Benefit of the Federal Government § 1204.1404 Requests for use of NASA airfield facilities. (a) Request for use...

  8. Evaluation of the WavTrac Expeditionary Mobility Matting System

    DTIC Science & Technology

    2017-04-01

    pavement applications. Designation D6951. West Conshohocken, PA: ASTM International. www.astm.org. Rushing, T. W., and J. F. Rowland. 2012. Comparison of...respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other...The technical monitor was Jeb S. Tingle. The work was performed by the Airfields and Pavements Branch (APB) of the Engineering Systems and Materials

  9. Nondestructive evaluation of pavement structural condition for rehabilitation design : final report.

    DOT National Transportation Integrated Search

    2016-05-31

    Falling Weight Deflectometer (FWD) is the common non-destructive testing method for in-situ evaluation of pavement condition. : This study aims to develop finite element (FE) models that can simulate FWD loading on pavement system and capture the : c...

  10. Resilient modulus of freeze-thaw affected granular soils for pavement design and evaluation. Part 4: Field validation tests at Albany County Airport

    NASA Astrophysics Data System (ADS)

    Johnson, T. C.; Crowe, A.; Erickson, M.; Cole, D. M.

    1986-10-01

    Stress-deformation data for unbound base, subbase, and silty sand subgrade soils in two airfield pavements were obtained from in situ tests and laboratory tests. Surface deflections were measured in the in situ tests, with a falling-weight deflectometer, when the soils were frozen, thawed, and at various stages of recovery from thaw weakening. The measured deflections were used to judge the validity of procedures developed for laboratory triaxial tests to determine nonlinear resilient moduli of specimens in the frozen, thawed and recovering states. The validity of the nonlinear resilient moduli, expressed as functions of externally applied stress and moisture tension, was confirmed by using the expressions to calculate surface deflections that were found to compare well with deflections measured in the in situ tests. The tests on specimens at various stages of recovery are especially significant because they show a strong dependence of the resilient modulus on moisture tension, leading to the conclusion that predictions or in situ measurements of moisture tension can be used to evaluate expected seasonal variation in the resilient modulus of granular soils.

  11. Evaluation of Pavement Safety Performance

    DOT National Transportation Integrated Search

    2015-02-01

    The intent of this study was to isolate the effects of various low-cost pavement treatments on roadway safety. This was a retrospective study of pavement safety performance, looking back at crash data before and after treatments were installed. Both ...

  12. Evaluation of bond strength between pavement layers.

    DOT National Transportation Integrated Search

    2005-12-01

    The primary objective of this project was to develop a test for measuring the bond strength : between pavement layers. The research was also to evaluate tack coat materials and application : rates for the Alabama Department of Transportation (ALDOT)....

  13. WAKE ISLAND AIRFIELD TERMINAL, BUILDING 1502 LOOKING EAST WITH PHOTO ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    WAKE ISLAND AIRFIELD TERMINAL, BUILDING 1502 LOOKING EAST WITH PHOTO SCALE CENTERED ON BUILDING (12/30/2008) - Wake Island Airfield, Terminal Building, West Side of Wake Avenue, Wake Island, Wake Island, UM

  14. Use of Falling Weight Deflectometer Data for Assessing Pavement Structural Evaluation Values

    DOT National Transportation Integrated Search

    1999-09-01

    Structural evaluation can be very useful at the network level for project prioritization purposes. In the project priority ranking procedure of the Kansas Department of Transportation (KDOT), a pavement rating attribute, Pavement Structural Evaluatio...

  15. Evaluation of solar-powered raised pavement markers.

    DOT National Transportation Integrated Search

    2008-01-01

    An evaluation of a limited number of solar-powered raised pavement markers (SRPMs) was conducted to : determine if this type of marker would be more visible than retroreflective markers in some situations on : Oregon highways. SRPMs typically use Lig...

  16. Evaluation of concrete pavements with materials-related distress : appendix A, part 1.

    DOT National Transportation Integrated Search

    2010-03-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors contributing to pavement distress observed in the field were determined, including expansive alkali-silica reactivity and freeze-thaw deterioration related to poor entr...

  17. Evaluation of concrete pavements with materials-related distress : appendix A, part 3.

    DOT National Transportation Integrated Search

    2010-03-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors contributing to pavement distress observed in the field were determined, including expansive alkali-silica reactivity and freeze-thaw deterioration related to poor entr...

  18. Evaluation of concrete pavements with materials-related distress : appendix A, part 2.

    DOT National Transportation Integrated Search

    2010-03-02

    An evaluation of cores sampled from six concrete pavements was performed. Factors contributing to pavement distress observed in the field were determined, including expansive alkali-silica reactivity and freeze-thaw deterioration related to poor entr...

  19. 14 CFR § 1204.1404 - Requests for use of NASA airfield facilities.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 5 2014-01-01 2014-01-01 false Requests for use of NASA airfield... ADMINISTRATION ADMINISTRATIVE AUTHORITY AND POLICY Use of NASA Airfield Facilities by Aircraft Not Operated for the Benefit of the Federal Government § 1204.1404 Requests for use of NASA airfield facilities. (a...

  20. Evaluation of multilayered pavement structures from measurements of surface waves

    USGS Publications Warehouse

    Ryden, N.; Lowe, M.J.S.; Cawley, P.; Park, C.B.

    2006-01-01

    A method is presented for evaluating the thickness and stiffness of multilayered pavement structures from guided waves measured at the surface. Data is collected with a light hammer as the source and an accelerometer as receiver, generating a synthetic receiver array. The top layer properties are evaluated with a Lamb wave analysis. Multiple layers are evaluated by matching a theoretical phase velocity spectrum to the measured spectrum. So far the method has been applied to the testing of pavements, but it may also be applicable in other fields such as ultrasonic testing of coated materials. ?? 2006 American Institute of Physics.

  1. Historical performance evaluation of Iowa pavement treatments using data analytics : final report.

    DOT National Transportation Integrated Search

    2016-11-01

    The pavement network in Iowa has reached a mature state making maintenance and rehabilitation activities more important than new construction. As such, a need exists to evaluate the performance of the pavement treatments and estimate their performanc...

  2. Evaluation of Liquid Detergents and Methods Used for Airfield Rubber Removal

    DTIC Science & Technology

    2012-07-31

    friction. Each detergent is applied to the pavement surface in controlled 50’ x 30’ patches. There were three patches placed for each detergent with...Measurements ..........................................................................................................16 6.3. Periodic Pavement Wetting...19 Figure 14. Pre-Cleaning Micro -Texture Data Graph (GT View Data

  3. Evaluation Model for Pavement Surface Distress on 3d Point Clouds from Mobile Mapping System

    NASA Astrophysics Data System (ADS)

    Aoki, K.; Yamamoto, K.; Shimamura, H.

    2012-07-01

    This paper proposes a methodology to evaluate the pavement surface distress for maintenance planning of road pavement using 3D point clouds from Mobile Mapping System (MMS). The issue on maintenance planning of road pavement requires scheduled rehabilitation activities for damaged pavement sections to keep high level of services. The importance of this performance-based infrastructure asset management on actual inspection data is globally recognized. Inspection methodology of road pavement surface, a semi-automatic measurement system utilizing inspection vehicles for measuring surface deterioration indexes, such as cracking, rutting and IRI, have already been introduced and capable of continuously archiving the pavement performance data. However, any scheduled inspection using automatic measurement vehicle needs much cost according to the instruments' specification or inspection interval. Therefore, implementation of road maintenance work, especially for the local government, is difficult considering costeffectiveness. Based on this background, in this research, the methodologies for a simplified evaluation for pavement surface and assessment of damaged pavement section are proposed using 3D point clouds data to build urban 3D modelling. The simplified evaluation results of road surface were able to provide useful information for road administrator to find out the pavement section for a detailed examination and for an immediate repair work. In particular, the regularity of enumeration of 3D point clouds was evaluated using Chow-test and F-test model by extracting the section where the structural change of a coordinate value was remarkably achieved. Finally, the validity of the current methodology was investigated by conducting a case study dealing with the actual inspection data of the local roads.

  4. Experimental flexible pavements.

    DOT National Transportation Integrated Search

    1971-01-01

    A program of construction and the performance evaluation of three major Virginia experimental flexible pavements is reported. The objective of the program was to evaluate the performance of pavements incorporating new or timely design concepts and to...

  5. Evaluation of the use of snowplowable raised pavement markers.

    DOT National Transportation Integrated Search

    2009-04-01

    The objective of this study was to evaluate the effectiveness and durability of snowplowable raised pavement markers (RPM) installed on the RPM system in Kentucky. The durability evaluation dealt wit the marker housing. : The data show that continued...

  6. Pavement Structural Evaluation at the Network Level [Tech Brief

    DOT National Transportation Integrated Search

    2016-03-01

    This document is a technical summary of the Federal Highway Administration (FHWA) report, Pavement Structural Evaluation at the Network Level (FHWA-HRT-15-074). It addresses the use of traffic speed deflection devices for the structural evaluation of...

  7. Evaluation of pavement surface friction treatments.

    DOT National Transportation Integrated Search

    2011-12-01

    The implementation of a pavement preservation program involves a learning curve with not only a determination to succeed, but : also the courage to fail. Also, successful implementation of pavement preservation program requires knowledge of the perfo...

  8. 5. VIEW OF AIRFIELD LOOKING EAST FROM BUILDING 8200 (CONTROL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. VIEW OF AIRFIELD LOOKING EAST FROM BUILDING 8200 (CONTROL TOWER) SHOWING TAXIWAY B CROSSING ALPHA TAXIWAY IN FOREGROUND, ALERNATE RUNWAY (TAXIWAY J) IN MIDDLE GROUND, AND NORTH-SOUTH RUNWAY IN BACKGROUND. - Loring Air Force Base, Airfield, Central portion of base, Limestone, Aroostook County, ME

  9. Evaluation of continuously reinforced concrete pavement : final report.

    DOT National Transportation Integrated Search

    1975-02-01

    This report provides a review of the performance and structural characteristic exhibited on five continuously reinforced concrete pavement projects in the State of Louisiana. The performance characteristics were evaluated by means of the Mays Ride Me...

  10. Commonwealth of Pennsylvania Bureau of Aviation pavement evaluation report : final report, March 2010.

    DOT National Transportation Integrated Search

    2010-03-01

    As part of the Pennsylvania Department of Transportations (PennDOT) airport pavement management efforts, the Bureau of : Aviation (BOA) retained Applied Pavement Technology, Inc. (APTech), assisted by DY Consultants, to evaluate the condition of t...

  11. Long-Term Performance Evaluation of Asphalt Surface Treatments: Product Placement

    DTIC Science & Technology

    2010-02-01

    20 Wheeler-Sack Army Airfield, Fort Drum , New York ...............................................................28 4...Grip Tester underside view ................................................................................ 6 Figure 3. Rotating disc of Dynamic...measures pavement friction using the braked -wheel, fixed-slip principle. Two wheels support the Grip Tester on a drive axle, while a measuring wheel with

  12. Roads and Airfields I (Programed Instruction). Engineer Subcourse 64-9.

    ERIC Educational Resources Information Center

    Army Engineer School, Fort Belvoir, VA.

    The document is a programed text for a correspondence course in the planning, construction, and maintenance of military roads and airfields. There are seven lessons: construction requirements and design criteria; road reconnaissance and site selection; airfield reconnaissance and site selection; layout procedures, construction staking, and field…

  13. Historical performance evaluation of Iowa pavement treatments using data analytics : tech transfer summary.

    DOT National Transportation Integrated Search

    2017-01-01

    Evaluate the performance of the most-used pavement treatments in Iowa by considering different parameters such as type of treatment, treatment thickness, traffic, and pavement type : Estimate a service life for each treatment based on the obs...

  14. 6. VIEW OF AIRFIELD LOOKING SOUTHEAST FROM BUILDING 8200 (CONTROL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. VIEW OF AIRFIELD LOOKING SOUTHEAST FROM BUILDING 8200 (CONTROL TOWER SHOWING ALPHA TAXIWAY AND ALTERNATE RUNWAY (TAXIWAY J) IN FOREGROUND, NORTH-SIDE RUNWAY IN MIDDLE GROUND, AND ALERT AREA WITH ITS TAXIWAY IN BACKGROUND. - Loring Air Force Base, Airfield, Central portion of base, Limestone, Aroostook County, ME

  15. Evaluation of pavement permeability in Mississippi.

    DOT National Transportation Integrated Search

    2003-07-01

    The proper compaction of hot mix asphalt (HMA) pavements is vital for a stable and durable pavement. For dense-graded mixtures, it has been recommended that the initial in-place air voids at the time of construction should not be below 3 percent or a...

  16. Evaluation of double drop beads pavement edge lines.

    DOT National Transportation Integrated Search

    2009-08-01

    This report presents an evaluation of Double Drop Bead (DDB) edge lines used on ALDOT-maintained highways. It compares DDB to three other pavement marking types in terms of service lives, life-cycle costs, and both dry-night retroreflectivity and wet...

  17. Evaluation of construction strategies for PCC pavement rehabilitation projects.

    DOT National Transportation Integrated Search

    2010-09-30

    This study investigated project management level solutions to optimizing resources, minimizing costs : (including user costs) and time for PCC pavement rehabilitation projects. This study extensively : evaluated the applicability of the Construction ...

  18. Development of the MASW method for pavement evaluation.

    DOT National Transportation Integrated Search

    2016-07-31

    The purpose of this research is to establish a recommended procedure for performing multichannel analysis of surface waves (MASW) on pavements as well as evaluating the ability of MASW to detect a change in shear wave velocity as damage in concrete i...

  19. Airfield Damage Repair (ADR); Polymer Repair of Airfields Summary of Research

    DTIC Science & Technology

    2007-12-01

    reported in section 4.3.1. Prior to mixing, the stainless steel bowl, paddle and molds were sprayed with an industrial silicone release agent, Zip-Slip...aggressive foaming and segregation problems. airfield damage repair, (ADR), polymer, concrete, polymer concrete, crater repair U U U UU 30 R. Craig...Polymer Technology for Agile Combat Support to develop a rapid crater repair using resin binders for indigenous materials. The research team consisted of

  20. Continuously reinforced concrete pavement inventory

    NASA Astrophysics Data System (ADS)

    Halverson, A. D.; Hagen, M. G.

    1982-09-01

    A typical concrete pavement has expansion and contraction joints across and along the pavement surface. The joints allow the pavement to change in dimension with changes in temperature. A continuously reinforced concrete pavement (CRCP) does not have expansion or contraction joints. Random, closely spaced cracks are expected to develop naturally and allow for expansion and contraction due to temperature changes. The many random cracks eliminate expensive joint maintenance. This maintenance-free service life feature has not occurred in Minnesota. This CRCP inventory is a physical evaluation of the extent of corrosion on random sections of pavement. It is related to concurrent efforts which will evaluate CRCP rehabilitation techniques.

  1. Evaluation of emission control strategies for airfield operations at the Los Angeles and San Francisco International Airports. Final report

    DOE Office of Scientific and Technical Information (OSTI.GOV)

    Gelinas, C.G.

    1978-08-01

    This report reviews potential air pollutant emission reductions which could be achieved by various strategies to control airfield operations at Los Angeles and San Francisco International Airports, and examines safety problems, cost impacts, potential fuel savings, time frame for strategy implementation, and potential regulatory and jurisdictional conflicts associated with each strategy. Airfield emission sources studied included aircraft operation in the idle, taxi, takeoff, and landing modes; ground service vehicles; fuel handling and storage; and aircraft engine maintenance. Nineteen potential strategies were identified, and seven strategies were selected for detailed analysis and examination after a preliminary evaluation. Two strategies, aircraft towingmore » and reducing the number of operating engines on the ground, appear to provide the most significant emission reduction. Both of these strategies offer potential reductions in the range of 20 to 40 percent of the carbon monoxide and nitrogen oxides which are currently emitted by ground operations. The aircraft towing strategy also offers a comparable improvement in suspended particulate matter emissions. When the overall feasibility of each strategy is evaluated, the strategy to reduce the number of operating engines appears to be the most viable since its implementation would result in fuel savings, no apparent safety problems, and it can be implemented immediately.« less

  2. Existing pavement input information for the mechanistic-empirical pavement design guide.

    DOT National Transportation Integrated Search

    2009-02-01

    The objective of this study is to systematically evaluate the Iowa Department of Transportations (DOTs) existing Pavement Management Information System (PMIS) with respect to the input information required for Mechanistic-Empirical Pavement Des...

  3. Evaluation of Geosynthetics in Asphalt Overlays of Jointed Concrete Pavements

    DOT National Transportation Integrated Search

    2000-06-01

    This report presents the findings and recommendations based on the Evaluation of Geosynthetics in Asphalt Overlays of Jointed Concrete Pavements. This project evaluated Linq Tac-711N and Strata Grid-200's ability to ease distress and reflective crack...

  4. Evaluation of a concrete pavement restoration project in Virginia.

    DOT National Transportation Integrated Search

    1994-01-01

    The purpose of this Federal Highway Administration Demonstration Project was to evaluate the installation and performance of a section of I-81 in Botetourt County, Virginia, that was rehabilitated by concrete pavement restoration (CPR) methods. The s...

  5. Ground penetrating radar (GPR) for pavement evaluation.

    DOT National Transportation Integrated Search

    2012-12-01

    In the near future the Arkansas State Highway and Transportation Department Pavement Management System (PMS) will utilize a : Falling Weight Deflectometer (FWD) to collect network level pavement structural data to aid in predicting performance of pav...

  6. Ground Penetrating Radar : Pavement Layer Thickness Evaluation

    DOT National Transportation Integrated Search

    2003-12-01

    The following report demonstrates the accuracy of using Ground Penetrating Radar (GPR) to determine both the surface layer thickness for asphalt, and concrete pavements. In addition tests were conducted to identify GPR's repeatability on dry pavement...

  7. Ground penetrating radar, pavement layer thickness evaluation

    DOT National Transportation Integrated Search

    2002-12-01

    The following report demonstrates the accuracy of using Ground Penetrating Radar (GPR) to determine both the surface layer thickness for asphalt, and concrete pavements. In addition tests were conducted to identify GPR's repeatability on dry pavement...

  8. Ground Penetrating Radar : Pavement Layer Thickness Evaluation

    DOT National Transportation Integrated Search

    2002-12-01

    The following report demonstrates the accuracy of using Ground Penetrating Radar (GPR) to determine both the surface layer thickness for asphalt, and concrete pavements. In addition tests were conducted to identify GPR's repeatability on dry pavement...

  9. 32 CFR 855.7 - Conditions for use of Air Force airfields.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 6 2010-07-01 2010-07-01 false Conditions for use of Air Force airfields. 855.7 Section 855.7 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE AIRCRAFT CIVIL AIRCRAFT USE OF UNITED STATES AIR FORCE AIRFIELDS Civil Aircraft Landing Permits § 855.7...

  10. 32 CFR 855.7 - Conditions for use of Air Force airfields.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 6 2013-07-01 2013-07-01 false Conditions for use of Air Force airfields. 855.7 Section 855.7 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE AIRCRAFT CIVIL AIRCRAFT USE OF UNITED STATES AIR FORCE AIRFIELDS Civil Aircraft Landing Permits § 855.7...

  11. 32 CFR 855.7 - Conditions for use of Air Force airfields.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 6 2014-07-01 2014-07-01 false Conditions for use of Air Force airfields. 855.7 Section 855.7 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE AIRCRAFT CIVIL AIRCRAFT USE OF UNITED STATES AIR FORCE AIRFIELDS Civil Aircraft Landing Permits § 855.7...

  12. 32 CFR 855.7 - Conditions for use of Air Force airfields.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 6 2012-07-01 2012-07-01 false Conditions for use of Air Force airfields. 855.7 Section 855.7 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE AIRCRAFT CIVIL AIRCRAFT USE OF UNITED STATES AIR FORCE AIRFIELDS Civil Aircraft Landing Permits § 855.7...

  13. 32 CFR 855.7 - Conditions for use of Air Force airfields.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 6 2011-07-01 2011-07-01 false Conditions for use of Air Force airfields. 855.7 Section 855.7 National Defense Department of Defense (Continued) DEPARTMENT OF THE AIR FORCE AIRCRAFT CIVIL AIRCRAFT USE OF UNITED STATES AIR FORCE AIRFIELDS Civil Aircraft Landing Permits § 855.7...

  14. Noise-tolerant inverse analysis models for nondestructive evaluation of transportation infrastructure systems using neural networks

    NASA Astrophysics Data System (ADS)

    Ceylan, Halil; Gopalakrishnan, Kasthurirangan; Birkan Bayrak, Mustafa; Guclu, Alper

    2013-09-01

    The need to rapidly and cost-effectively evaluate the present condition of pavement infrastructure is a critical issue concerning the deterioration of ageing transportation infrastructure all around the world. Nondestructive testing (NDT) and evaluation methods are well-suited for characterising materials and determining structural integrity of pavement systems. The falling weight deflectometer (FWD) is a NDT equipment used to assess the structural condition of highway and airfield pavement systems and to determine the moduli of pavement layers. This involves static or dynamic inverse analysis (referred to as backcalculation) of FWD deflection profiles in the pavement surface under a simulated truck load. The main objective of this study was to employ biologically inspired computational systems to develop robust pavement layer moduli backcalculation algorithms that can tolerate noise or inaccuracies in the FWD deflection data collected in the field. Artificial neural systems, also known as artificial neural networks (ANNs), are valuable computational intelligence tools that are increasingly being used to solve resource-intensive complex engineering problems. Unlike the linear elastic layered theory commonly used in pavement layer backcalculation, non-linear unbound aggregate base and subgrade soil response models were used in an axisymmetric finite element structural analysis programme to generate synthetic database for training and testing the ANN models. In order to develop more robust networks that can tolerate the noisy or inaccurate pavement deflection patterns in the NDT data, several network architectures were trained with varying levels of noise in them. The trained ANN models were capable of rapidly predicting the pavement layer moduli and critical pavement responses (tensile strains at the bottom of the asphalt concrete layer, compressive strains on top of the subgrade layer and the deviator stresses on top of the subgrade layer), and also pavement

  15. Evaluation of MDOT's Distress Thresholds for Maintained Pavement Projects

    DOT National Transportation Integrated Search

    2012-07-30

    As an alternative to traditional contracting, pavement warranty has been adopted in Mississippi since 2000, aimed to : enhance pavement performance and protect the investment in pavement construction. Currently, a manual distress survey : method and ...

  16. Pavement performance evaluation, phase II : data collection.

    DOT National Transportation Integrated Search

    2008-12-01

    Phase I and II of this study tested approximately 1500 rehabilitated pavements (asphalt and PCC) : throughout the State. These pavements ranged from 5 to 15 years old and were intended to develop a : snapshot of how various rehabilitations were perfo...

  17. Integration and Evaluation of Automated Pavement Distress Data in INDOT’s Pavement Management System

    DOT National Transportation Integrated Search

    2017-05-01

    This study was in two parts. The first part established and demonstrated a framework for pavement data integration. This is critical for fulfilling QC/QA needs of INDOTs pavement management system, because the precision of the physical location re...

  18. Comparative Evaluation of Pavement Crack Detection Using Kernel-Based Techniques in Asphalt Road Surfaces

    NASA Astrophysics Data System (ADS)

    Miraliakbari, A.; Sok, S.; Ouma, Y. O.; Hahn, M.

    2016-06-01

    With the increasing demand for the digital survey and acquisition of road pavement conditions, there is also the parallel growing need for the development of automated techniques for the analysis and evaluation of the actual road conditions. This is due in part to the resulting large volumes of road pavement data captured through digital surveys, and also to the requirements for rapid data processing and evaluations. In this study, the Canon 5D Mark II RGB camera with a resolution of 21 megapixels is used for the road pavement condition mapping. Even though many imaging and mapping sensors are available, the development of automated pavement distress detection, recognition and extraction systems for pavement condition is still a challenge. In order to detect and extract pavement cracks, a comparative evaluation of kernel-based segmentation methods comprising line filtering (LF), local binary pattern (LBP) and high-pass filtering (HPF) is carried out. While the LF and LBP methods are based on the principle of rotation-invariance for pattern matching, the HPF applies the same principle for filtering, but with a rotational invariant matrix. With respect to the processing speeds, HPF is fastest due to the fact that it is based on a single kernel, as compared to LF and LBP which are based on several kernels. Experiments with 20 sample images which contain linear, block and alligator cracks are carried out. On an average a completeness of distress extraction with values of 81.2%, 76.2% and 81.1% have been found for LF, HPF and LBP respectively.

  19. Measures to increase airfield capacity by changing aircraft runway occupancy characteristics

    NASA Technical Reports Server (NTRS)

    Gosling, G. D.; Kanafani, A.; Rockaday, S. L. M.

    1981-01-01

    Airfield capacity and aircraft runway occupancy characteristics were studied. Factors that caused runway congestion and airfield crowding were identified. Several innovations designed to alleviate the congestion are discussed. Integrated landing management, the concept that the operation of the final approach and runway should be considered in concert, was identified as underlying all of the innovations.

  20. Implementation of automatic sign inventory and pavement condition evaluation on Georgia's interstate highways : final report.

    DOT National Transportation Integrated Search

    2017-02-01

    Traffic signs and pavements are indispensable assets to facilitate safe and uninterrupted travel. Manual methods are used for both traffic sign inventory and pavement condition evaluation by the Georgia Department of Transportation (GDOT), although t...

  1. Evaluation and analysis of LTPP pavement layer thickness data

    DOT National Transportation Integrated Search

    2002-07-30

    In 2001, the Federal Highway Administration sponsored a study to review pavement layer thickness data for Long Term Pavement Performance (LTPP) sites. The main objective of the study was to assess the quality and completeness of pavement layering inf...

  2. Pavement testing facility : effects of tire pressure on flexible pavement response performance

    DOT National Transportation Integrated Search

    1989-08-01

    The effects of tire pressure on flexible pavement response and performance were evaluated using data from the first phase of research at the Federal Highway Administration's Pavement Testing Facility. The Accelerated Loading Facility testing machine ...

  3. Feasibility of reclaimed asphalt pavement as aggregate in portland cement concrete pavements.

    DOT National Transportation Integrated Search

    2013-11-01

    This research effort was focused on evaluating the feasibility of using minimally processed reclaimed : asphalt pavement (RAP) as aggregate replacement in concrete pavements. This research demonstrated : that concretes with up to 50 percent of the fi...

  4. Pavement marking performance analysis

    DOT National Transportation Integrated Search

    2009-06-30

    This research evaluated pavement marking performance and developed useful degradation models for thermoplastic : and paint pavement markings which can help North Carolina meet the pending FHWA minimum retroreflectivity : requirements. The impacts of ...

  5. Use of nondestructive evaluation to detect moisture in flexible pavements.

    DOT National Transportation Integrated Search

    2006-01-01

    The purpose of this study was to identify the currently available nondestructive evaluation technology that holds the greatest potential to detect moisture in flexible pavements and then apply the technology in multiple locations throughout Virginia....

  6. Recycling Old PCC Pavement - Performance Evaluation of FAI 57 Inlays

    DOT National Transportation Integrated Search

    1993-02-01

    This report details the construction and performance monitoring efforts of two demonstration projects proposed in an experimental features work plan entitled Recycling Old PCC Pavement". The objectives of this experimental feature were to evaluate th...

  7. Evaluation of experimental flexible pavements : interim report no. 1, construction of Altavista Bypass experimental pavement.

    DOT National Transportation Integrated Search

    1974-01-01

    Deflection tests conducted during the construction and shortly after the completion of a large experimental pavement project are reported. Four different pavement designs, as follows, are compared: 1. 6-inch cement stabilized subgrade, 6-inch crushed...

  8. 78 FR 27472 - Notice of Passenger Facility Charge (PFC) Approvals and Disapprovals

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-10

    ... Approved For Collection And Use: Airfield lighting and vault. Runway 21 extension--preliminary design...--80 facility modification design and build-out. Access control enhancements. Security fence replacement. Airfield pavement survey. Jet bridge refurbishment. Security checkpoint modification. Friction...

  9. Evaluating Pavement Design Features: Five Year Performance Evaluation of FA 401 and FA 409

    DOT National Transportation Integrated Search

    1993-02-01

    In the summer of 1986, the Illinois Department of Transportation began the construction of four demonstration projects which focused on evaluating proposed mechanistically-based asphalt concrete (AC) and Portland cement concrete (PCC) pavement design...

  10. Evaluation of LTPP Climatic Data for Use in Mechanistic-Empirical Pavement Design Guide (MEPDG) Calibration and Other Pavement Analysis

    DOT National Transportation Integrated Search

    2015-02-01

    This TechBrief describes evaluating the use of the Modern-Era Retrospective Analysis for Research and Applications (MERRA) product as an alternative climatic data source for the Mechanistic-Empirical Pavement Design Guide (MEPDG) and other transporta...

  11. Laboratory evaluation of characteristics of recycled asphalt pavement in Kansas.

    DOT National Transportation Integrated Search

    2011-09-01

    The main objective of this research was to evaluate characteristics of milled Recycled Asphalt : Pavements (RAP) collected from selected milled roadways in Kansas. The RAP was collected from three : selected milled roadways including K-25 in Grant Co...

  12. 14 CFR 93.343 - Requirements for aircraft operations to or from College Park Airport, Potomac Airfield, or...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... from College Park Airport, Potomac Airfield, or Washington Executive/Hyde Field Airport. 93.343 Section..., Potomac Airfield, or Washington Executive/Hyde Field Airport. (a) A pilot may not operate an aircraft to or from College Park Airport, MD, Potomac Airfield, MD, or Washington Executive/Hyde Field Airport...

  13. 14 CFR 93.343 - Requirements for aircraft operations to or from College Park Airport, Potomac Airfield, or...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... from College Park Airport, Potomac Airfield, or Washington Executive/Hyde Field Airport. 93.343 Section..., Potomac Airfield, or Washington Executive/Hyde Field Airport. (a) A pilot may not operate an aircraft to or from College Park Airport, MD, Potomac Airfield, MD, or Washington Executive/Hyde Field Airport...

  14. 14 CFR 93.343 - Requirements for aircraft operations to or from College Park Airport, Potomac Airfield, or...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... from College Park Airport, Potomac Airfield, or Washington Executive/Hyde Field Airport. 93.343 Section..., Potomac Airfield, or Washington Executive/Hyde Field Airport. (a) A pilot may not operate an aircraft to or from College Park Airport, MD, Potomac Airfield, MD, or Washington Executive/Hyde Field Airport...

  15. 14 CFR 93.343 - Requirements for aircraft operations to or from College Park Airport, Potomac Airfield, or...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... from College Park Airport, Potomac Airfield, or Washington Executive/Hyde Field Airport. 93.343 Section..., Potomac Airfield, or Washington Executive/Hyde Field Airport. (a) A pilot may not operate an aircraft to or from College Park Airport, MD, Potomac Airfield, MD, or Washington Executive/Hyde Field Airport...

  16. 14 CFR 93.343 - Requirements for aircraft operations to or from College Park Airport, Potomac Airfield, or...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... from College Park Airport, Potomac Airfield, or Washington Executive/Hyde Field Airport. 93.343 Section..., Potomac Airfield, or Washington Executive/Hyde Field Airport. (a) A pilot may not operate an aircraft to or from College Park Airport, MD, Potomac Airfield, MD, or Washington Executive/Hyde Field Airport...

  17. Evaluation of pavement surface friction treatments : [technical summary].

    DOT National Transportation Integrated Search

    2011-01-01

    The implementation of a pavement preservation program involves a learning curve with not only a determination to succeed, but also the courage to fail. Successful implementation of pavement preservation program requires knowledge of the performance o...

  18. A case study evaluation of the use of video technology in concrete pavement evaluation.

    DOT National Transportation Integrated Search

    2000-01-01

    This report presents the results of an evaluation of video technology as a possible solution to the problem of safely collecting objective condition data for prioritizing concrete pavement rehabilitation needs in Virginia. The study involved the eval...

  19. Evaluation of flexible pavement performance using LTPP data.

    DOT National Transportation Integrated Search

    2002-07-01

    Pavements are complicated physical structures responding in a complex way to : the influence of many variables. Understanding how the long-term performance of : pavement: relates to the factors such as environmental and traffic loads is key to : buil...

  20. 75 FR 13340 - Notice of Passenger Facility Charge (PFC) Approvals and Disapprovals

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-19

    ...--design and construction. Terminal facility improvements--design and construction. Runway pavement overlay... Collection at CHS and Use at CHS: Upgrade police radio communications. Design flight/baggage information... expansion--design. Standardize airfield signage. Restripe airfield taxiway and ramp edge. Improve airport...

  1. More Airfields Equals More Opportunities

    DTIC Science & Technology

    2012-03-01

    NEPA National Environmental Policy Act xiv PRV Plant Replacement Value RAF Royal Air Force SAC Strategic Air Command SACEUR Supreme...follows the path of prior investment when dealing with airfields. According to the 2010 Base Structure Report, Ramstein’s Plant Replacement Value...Garrisons, 35. 85 Office of the Deputy Under Secretary of Defense (Installations & Environment), 2010 Base Structure Report, DOD-3. Plant Replacement

  2. Laboratory and Field Evaluation of In-Place Asphalt Recycling Technologies for Small Airfield Repair

    DTIC Science & Technology

    2013-06-01

    Mariely Mejías-Santiago and William D. Carruth Geotechnical and Structures Laboratory US Army Engineer Research and Development Center 3909 Halls...24. Pavement structure at Test Site 1. ....................................................................................... 28  Figure 25. Pavement... structure at ERDC test site. ................................................................................ 30  Figure 26. Heatwurx HWX-30 electric

  3. Evaluation of Long-Term Pavement Performance (LTTP) Climatic Data for Use in Mechanistic-Empirical Pavement Design Guide (MEPDG) Calibration and Other Pavement Analysis

    DOT National Transportation Integrated Search

    2015-05-01

    Improvements in the Long-Term Pavement Performance (LTPP) Programs climate data are needed to support current and future research into climate effects on pavement materials, design, and performance. The calibration and enhancement of the Mechanist...

  4. Design and construction of PCC pavements, volume 2 : design features and practices that influence performance of pavements.

    DOT National Transportation Integrated Search

    1998-10-01

    A study has been conducted to evaluate and analyze portland cement concrete (PCC) pavements in order to : develop recommendations for the design and construction of long-lived concrete pavements. It involved a : detailed evaluation and analysis of th...

  5. A mechanistic-empirical approach for evaluating the effect of diamond grinding and thin overlay on predicted pavement performance.

    DOT National Transportation Integrated Search

    2016-04-01

    Advancements in pavement management practice require evaluating the performance of pavement preservation treatments using performance-related characteristics. However, state highway agencies face the challenge of developing performance-based relation...

  6. Design and construction of PCC pavements. Volume 2, design features and practices that influence performance of pavements

    DOT National Transportation Integrated Search

    1998-10-01

    A study has been conducted to evaluate and analyze Portland cement concrete (PCC) pavements in order to develop recommendations for the design and construction of long-lived concrete pavements. In involved a detailed evaluation and analysis of the PC...

  7. Evaluation of narrow transverse contraction joints in jointed plain concrete pavements.

    DOT National Transportation Integrated Search

    2006-03-01

    This report presents the results of a research project conducted at the Louisiana Transportation Research Center (LTRC) to evaluate the performance of narrow transverse contraction joints to control cracking in jointed plain concrete pavements. In ad...

  8. Developing a GDOT pavement marking handbook using field test deck evaluation and long-term performance analysis : final report.

    DOT National Transportation Integrated Search

    2015-12-01

    This research project comprehensively reviewed the state departments of transportations (DOTs) practices on : selecting and inspecting pavement marking materials (PMMs) and evaluated pavement marking : retroreflectivity data collected on the Georg...

  9. Assessment of the Uretek process on continuously reinforced concrete pavement, jointed concrete pavement, and bridge approach slabs : technical assistance report.

    DOT National Transportation Integrated Search

    2004-12-01

    This study evaluates the rehabilitation method utilizing the injection of Uretek (polyurethane) into the pavement structures on continuously reinforced concrete pavement (CRCP), jointed concrete pavement (JCP), and bridge approach slabs. The polyuret...

  10. Study of Georgia's pavement deterioration/life and potential risks of delayed pavement resurfacing and rehabilitation.

    DOT National Transportation Integrated Search

    2016-08-01

    Georgia has continuously been rated as one of the states with the smoothest pavements in the United States because the Georgia Department of Transportation (GDOT) has established a standardized pavement condition evaluation system (PACES) for consist...

  11. Evaluation of Long-Life Concrete Pavement Practices for Use in Florida

    DOT National Transportation Integrated Search

    2012-11-01

    Current Florida construction practices produce asphalt pavements with a service life of 12 to 20 years before needing rehabilitation; concrete pavements are typically designed for 20 years. However, pavements with much longer design lives are possibl...

  12. Evaluating all-weather pavement markings in Illinois : volume 1.

    DOT National Transportation Integrated Search

    2015-12-01

    Pavement markings provide critical guidance to motorists, especially under dark (non-lighted) conditions. However, the : ability to see these pavement markings on a wet, rainy night is problematic given that the presence of water : considerably decre...

  13. Laboratory fatigue evaluation of continuously fiber-reinforced concrete pavement.

    DOT National Transportation Integrated Search

    2013-09-01

    Portland cement concrete (PCC) is the worlds most versatile construction material. PCC has : been in use in the United States for over 100 years. PCC pavement is generally constructed as : either continually reinforced concrete pavement (CRCP) or ...

  14. Evaluation of current Louisiana flexible pavement structures using PMS data and new mechanistic-empirical pavement design guide.

    DOT National Transportation Integrated Search

    2012-04-01

    The new Mechanistic-Empirical Pavement Design Guide (MEPDG) developed under the National Cooperative Highway Research Program (NCHRP) Project 1-37A represents a major change as compared to the 1993 AASHTO Pavement Design Guide. The MEPDG provides a r...

  15. Evaluation of Expedient Surfaces for Remote Piloted Aircraft

    DTIC Science & Technology

    2017-12-01

    as an official Department of the Army position unless so designated by other authorized documents. DESTROY THIS REPORT WHEN NO LONGER NEEDED. DO NOT...Technical oversight was provided by Mr. Jeb S. Tingle. The work was performed by the Airfields and Pavements Branch (GMA) of the Engineering Systems...needed to support expeditionary operations do not have to be as robust as systems designed to support manned aircraft, such as the AM2 matting

  16. Evaluation of portland cement concrete pavement with high slag content cement.

    DOT National Transportation Integrated Search

    2013-10-01

    The performance of a section of concrete pavement built with 30 percent Ground Granulated Blast Furnace Slag (GGBFS) is compared to a control section of concrete pavement built with 25 percent GGBFS to determine if the higher slag content pavement is...

  17. Evaluation of the Cape Seal Process as a Pavement Rehabilitation Alternative

    DOT National Transportation Integrated Search

    1998-10-01

    A 1-year research project was conducted to evaluate the Cape seal process as a pavement rehabilitation technique. During the course of this research project, most of the Cape seal projects that have been constructed within the state were visited as p...

  18. 75 FR 79077 - Notice of Passenger Facility Charge (PFC) Approvals and Disapprovals

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-17

    ... rehabilitation, phase I Airfield sweeper Airfield pavement markings Airport operations area security improvements... Collection and Use at a $3.00 PFC Level: Permanent in-line baggage system design Terminal 3 security... the FAA to design and construct the South Air Traffic Control Tower. In addition, due to the complex...

  19. Feasibility of reclaimed asphalt pavement as aggregate in portland cement concrete pavement, phase II : field demonstration.

    DOT National Transportation Integrated Search

    2015-10-01

    This research was focused on evaluating the feasibility of using minimally processed reclaimed asphalt pavement (RAP) as : aggregate replacement in concrete pavements. An initial phase of research demonstrated that concretes with up to 50 percent : o...

  20. Testing & Evaluation of Close-Range SAR for Monitoring & Automatically Detecting Pavement Conditions

    DOT National Transportation Integrated Search

    2012-01-01

    This report summarizes activities in support of the DOT contract on Testing & Evaluating Close-Range SAR for Monitoring & Automatically Detecting Pavement Conditions & Improve Visual Inspection Procedures. The work of this project was performed by Dr...

  1. Develop guidelines for pavement preservation treatments and for building a pavement preservation program platform for Alaska.

    DOT National Transportation Integrated Search

    2012-11-01

    This reports summarizes the project findings including the following: : An evaluation of the current pavement preservation program used in Alaska and a roadmap to grow the program : A summary of the best practices in terms of pavement preserv...

  2. Evaluation of data requirements for computerized constructability analysis of pavement rehabilitation projects.

    DOT National Transportation Integrated Search

    2013-08-01

    This research aimed to evaluate the data requirements for computer assisted construction planning : and staging methods that can be implemented in pavement rehabilitation projects in the state of : Georgia. Results showed that two main issues for the...

  3. Field investigation of high performance pavements in Virginia.

    DOT National Transportation Integrated Search

    2005-01-01

    This study evaluated 18 pavement sections located in high-traffic highways in Virginia to find a premium pavement design with a life span of 40 years or more using current and past field experience. The selected pavement sections were thought to perf...

  4. Evaluation of porous pavements used in Oregon : volume I.

    DOT National Transportation Integrated Search

    1994-12-01

    Porous pavements or open graded asphalt mixtures have been in use in Oregon since the late 1960s. The use of this pavement type has increased over the years because the pores in the mat provide a better way for water to drain from the surface. This g...

  5. Evaluation of Rapid-Setting Concretes for Airfield Spall Repair

    DTIC Science & Technology

    1991-04-01

    repair concretes for Rapid Runway Repair (RRR). The three were a methyl methacrylate binder (Silikal RI7AF), a magnesium phosphate mortar mix (Set-45...reld Methyl methacrylate Rapid-setting 82 Blended cement Pavement materials 16. PRICE CODE Magnesium phosphate cement Rapid runway repair Spall repair 17...conditions, and for use during RRR training. Silikal is a methyl methacrylate , which forms a solid mass within minutes after its two components are mixed. It

  6. Study of Georgia's pavement deterioration/life and potential risks of delayed pavement resurfacing and rehabilitation : final report.

    DOT National Transportation Integrated Search

    2016-08-01

    Georgia has continuously been rated as one of the states with the smoothest pavements in the United States because the Georgia Department of Transportation (GDOT) has established a standardized pavement condition evaluation system (PACES) for consist...

  7. Study of Georgia's pavement deterioration/life and potential risks of delayed pavement resurfacing and rehabilitation : final report.

    DOT National Transportation Integrated Search

    2016-08-01

    Georgia has continuously been rated as one of the states with the smoothest pavements in the United States : because the Georgia Department of Transportation (GDOT) has established a standardized pavement condition : evaluation system (PACES) for con...

  8. Evaluation of MDOT's Distress Thresholds for Maintained June 30, 2012 Pavement Projects

    DOT National Transportation Integrated Search

    2012-05-30

    As an alternative to traditional contracting, pavement warranty has been adopted in Mississippi since 2000, aimed to : enhance pavement performance and protect the investment in pavement construction. Currently, a manual distress survey : method and ...

  9. Design and construction of PCC pavements. Volume 1, summary of design features and construction practices that influence performance of pavements

    DOT National Transportation Integrated Search

    1998-04-01

    A study has been conducted to evaluate and analyze Portland cement concrete (PCC) pavements in order to develop recommendations for the design and construction of long-lived concrete pavements. In involved a detailed evaluation and analysis of the PC...

  10. Evaluation of Long-Life Concrete Pavement Practices for Use in Florida : [Summary

    DOT National Transportation Integrated Search

    2012-01-01

    Current Florida construction practices produce asphalt pavements with a service life of 12 to 20 years before needing rehabilitation; concrete pavements are typically designed for 20 years. However, pavements with much longer design lives are possibl...

  11. INTERIOR OF SECOND FLOOR AIRFIELD MANAGEMENT SUPERINTENDENT'S OFFICE. VIEW TO ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    INTERIOR OF SECOND FLOOR AIRFIELD MANAGEMENT SUPERINTENDENT'S OFFICE. VIEW TO SOUTHEAST - Plattsburgh Air Force Base, Base Operations Building, Idaho at Alabama Avenue, Plattsburgh, Clinton County, NY

  12. Mechanistic interpretation of nondestructive pavement testing deflections

    NASA Astrophysics Data System (ADS)

    Hoffman, M. S.; Thompson, M. R.

    1981-06-01

    A method for the back calculation of material properties in flexible pavements based on the interpretation of surface deflection measurements is proposed. The ILLI-PAVE, a stress-dependent finite element pavement model, was used to generate data for developing algorithms and nomographs for deflection basin interpretation. Twenty four different flexible pavement sections throughout the State of Illinois were studied. Deflections were measured and loading mode effects on pavement response were investigated. The factors controlling the pavement response to different loading modes are identified and explained. Correlations between different devices are developed. The back calculated parameters derived from the proposed evaluation procedure can be used as inputs for asphalt concrete overlay design.

  13. Simplified Techniques for Evaluation and Interpretation of Pavement Deflections for Network-level Analysis : Guide for Assessment of Pavement Structure Performance for PMS Applications

    DOT National Transportation Integrated Search

    2012-06-01

    The objective of this study was to develop an approach for incorporating techniques to interpret and evaluate deflection : data for network-level pavement management system (PMS) applications. The first part of this research focused on : identifying ...

  14. Serviceable pavement marking retroreflectivity levels : technical report.

    DOT National Transportation Integrated Search

    2009-03-01

    This research addressed an array of issues related to measuring pavement markings retroreflectivity, factors : related to pavement marking performance, subjective evaluation process, best practices for using mobile : retroreflectometers, sampling pav...

  15. Groundwater modeling to evaluate interaquifer leakage in the Floridan aquifer system near Hunter Army Airfield and Fort Stewart

    USGS Publications Warehouse

    Cherry, Gregory S.

    2011-01-01

    Simulations using a modified regional groundwater- flow model were used to determine the amount of leakage from the Upper Floridan aquifer (UFA) through the Lower Floridan confining unit (LFC) into the Lower Floridan aquifer (LFA) resulting from pumping about 1 million gallons per day at newly constructed LFA production wells at Hunter Army Airfield and Fort Stewart in coastal Georgia. Simulated steadystate drawdown at each of the LFA production wells closely matched observed drawdown during a 72-hour aquifer test with the observed water levels reaching steady-state by the end of the test period. However, simulated drawdown was greater than observed drawdown in the UFA because of the short duration of the aquifer test and the time required for groundwater movement through the LFC into the LFA. Steadystate simulations provide an estimate of leakage based on the long-term continuous operation of each production well. Results of model simulations indicate that interaquifer leakage accounts for 48 percent of the flow to the well at Hunter Army Airfield, and 98 percent of the flow to the well at Fort Stewart. Simulated results near the Hunter Army Airfield production well indicated that 65 percent of the leakage from the UFA to the LFA occurs within a 1-mile radius, whereas simulated results near the Fort Stewart production well indicated 80-percent leakage from the UFA to the LFA within the same radius. The greater amount of leakage to the production well near Fort Stewart can be attributed to the higher transmissivity of the UFA and higher vertical hydraulic conductivity in the LFC near the well.

  16. Continued field evaluation of precutting for maintaining asphalt concrete pavements with thermal cracking.

    DOT National Transportation Integrated Search

    2017-08-01

    In continuation of a previously completed project entitled Evaluate Presawn Transverse Thermal Cracks for Asphalt Concrete Pavement, this project was a further effort to understand important variables in the thermal cracking process through continued...

  17. DOTD evaluates and integrates pavement management system performance to yield savings : [fact sheet].

    DOT National Transportation Integrated Search

    2015-07-01

    A research study was initiated by the Louisiana Department of Transportation and : Development (DOTD) in conjunction with the Federal Highway Administration : (FHWA) to evaluate the overall performance and e ectiveness of DOTDs : Pavement Manag...

  18. Evaluation of current Louisiana flexible pavement structures using PMS data and new mechanistic-empirical pavement design guide : tech summary.

    DOT National Transportation Integrated Search

    2012-04-01

    The new Mechanistic-Empirical Pavement Design Guide (MEPDG) developed under the National Cooperative Highway : Research Program (NCHRP) Project 1-37A represents a major change as compared to the 1993 AASHTO Pavement : Design Guide. MEPDG provides a r...

  19. An evaluation of factors affecting permeability of superpave designed pavements

    DOT National Transportation Integrated Search

    2003-06-01

    It can be expected that the life of a permeable pavement would be shorter than that of an impermeable pavement, due to deterioration of mix through water and air infiltration, and subsequent stripping and oxidation and hardening of binder. Recent wor...

  20. Evaluation of Nontraditional Airfield Pavement Surfaces for Contingency Operations

    DTIC Science & Technology

    2014-01-01

    such as asphalt or portland cement concrete are not readily available or are too cost-, labor-, or equipment-intensive to use. This report presents a...courses) are generally constructed using hot mix asphalt (HMA) or portland cement concrete (PCC), both of which are suitable for C-17 and C-130...associated with PCC or HMA surfacing. Stabilization can be accomplished by blending additives such as portland cement , lime, fly ash, asphalt binder

  1. Measurement, Construction, and Maintenance of Skid-Resistant Airport Pavement Surfaces

    DOT National Transportation Integrated Search

    1997-03-18

    This advisory circular (AC) contains guidelines and procedures for the design : and construction of skid-resistant pavement, pavement evaluation with friction : measuring equipment, and maintenance of high skid-resistant pavements. 45p.

  2. Experimental pavement delineation treatments

    NASA Astrophysics Data System (ADS)

    Bryden, J. E.; Lorini, R. A.

    1981-06-01

    Visibility and durability of materials used to delineate shoulders and medians adjacent to asphalt pavements were evaluated. Materials evaluated were polysulfide and coal tar epoxies, one and two component polyesters, portland cement, acrylic paints, modified-alkyd traffic paint, preformed plastic tape, and thermoplastic markings. Neat applications, sand mortars, and surface treatments were installed in several geometric patterns including cross hatches, solid median treatments, and various widths of edge lines. Thermoplastic pavement markings generally performed very well, providing good visibility under adverse viewing conditions for at least 4 years. Thermoplastic 4 in. wide edge lines appear to provide adequate visibility for most conditions.

  3. Comprehensive evaluation of compaction of asphalt pavements and development of compaction monitoring system.

    DOT National Transportation Integrated Search

    2012-04-01

    This study aimed to conduct a comprehensive evaluation of compaction of asphalt pavements and : develop software for monitoring field compaction in real time. In the first phase of this study, the researchers : built several test sections that were c...

  4. Pavement noise measurements in Poland

    NASA Astrophysics Data System (ADS)

    Zofka, Ewa; Zofka, Adam; Mechowski, Tomasz

    2017-09-01

    The objective of this study is to investigate the feasibility of the On-Board Sound Intensity (OBSI) system to measure tire-pavement noise in Poland. In general, sources of noise emitted by the modern vehicles are the propulsion noise, aerodynamic resistance and noise generated at the tire-pavement interface. In order to capture tire-pavement noise, the OBSI system uses a noise intensity probe installed in the close proximity of that interface. In this study, OBSI measurements were performed at different types of pavement surfaces such as stone mastic asphalt (SMA), regular asphalt concrete (HMA) as well as Portland cement concrete (PCC). The influence of several necessary OBSI measurement conditions were recognized as: testing speed, air temperature, tire pressure and tire type. The results of this study demonstrate that the OBSI system is a viable and robust tool that can be used for the quality evaluation of newly built asphalt pavements in Poland. It can be also applied to generate reliable input parameters for the noise propagation models that are used to assess the environmental impact of new and existing highway corridors.

  5. Mechanistic-empirical pavement design guide calibration for pavement rehabilitation.

    DOT National Transportation Integrated Search

    2013-01-01

    The Oregon Department of Transportation (ODOT) is in the process of implementing the recently introduced AASHTO : Mechanistic-Empirical Pavement Design Guide (MEPDG) for new pavement sections. The majority of pavement work : conducted by ODOT involve...

  6. Base course resilient modulus for the mechanistic-empirical pavement design guide : [summary].

    DOT National Transportation Integrated Search

    2011-01-01

    Elastic modulus determination is often used in designing pavements and evaluating pavement performance. The Mechanistic-Empirical Pavement Design Guide (MEPDG) has become an important source of guidance for pavement design and rehabilitation. MEPDG r...

  7. Evaluation of porous pavements used in Oregon : volume II : appendices.

    DOT National Transportation Integrated Search

    1994-12-01

    Porous pavements or open graded asphalt mixtures have been in use in Oregon since the late 1960s. The use of this pavement type has increased over the years because the pores in the mat provide a better way for water to drain from the surface. This g...

  8. Evaluation of crack-sealing milled pavement in the effort to reduce transverse cracking.

    DOT National Transportation Integrated Search

    2015-01-01

    To determine if crack sealing milled pavement prior to overlay will deter the : migration of transverse cracking, or have an effect on pavement performance, : when compared to an adjacent milled pavement that receives no crack sealing : treatment.

  9. Use of reclaimed asphalt pavement in concrete pavement slabs.

    DOT National Transportation Integrated Search

    2012-10-01

    This study evaluated the feasibiltiy of using RAP as aggregate replacement in concrete for use in pavement. Four different RAPs from FDOT approved RAP sources were used. Concrete mixtures with 0%, 20%, 40%, 70%, and 100% aggregate replacement by RAP ...

  10. Asphalt Pavements Session 2E-3 : Warm Mix Asphalt : Laboratory Evaluation and Pavement Design [SD .WMV (720x480/29fps/218.0 MB)

    DOT National Transportation Integrated Search

    2003-12-01

    This study evaluates one of the recycling techniques used to rehabilitate pavement, called Cold In-Place Recycling (CIR). CIR is one of the fastest growing road rehabilitation techniques because it is quick and cost-effective. The document reports on...

  11. Evaluation of notched wedge pavement joints vs. traditional butt joints for use in Connecticut.

    DOT National Transportation Integrated Search

    2008-01-01

    Following up on earlier research performed by several states and the : National Center for Asphalt Technology (NCAT) at Auburn University, the : University of Connecticuts Advanced Pavement Lab (CAP Lab) was : charged with evaluating the longitudi...

  12. Evaluation of latex polymers to resist stripping in asphalt pavements in Oregon : final report.

    DOT National Transportation Integrated Search

    2005-03-01

    This study assessed the effectiveness of latex polymer anti-stripping treatment by inspecting and evaluating the : condition of pavements constructed in Oregon from 1997-2001. Ten hot mix asphalt concrete paving projects : were identified throughout ...

  13. Evaluation of an asphalt-treated drainage blanket in a rigid pavement section : final report.

    DOT National Transportation Integrated Search

    1978-01-01

    This study was undertaken to develop a permeable yet stable, asphalt-treated, layered shoulder drainage system for a typical pavement section. Stability and permeability characteristics of several mixes were evaluated in the laboratory. Two installat...

  14. 32 CFR Attachment 4 to Part 855 - Sample Joint-Use Agreement

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... facilities for training. f. Air Force-owned airfield pavements made available for use under this Agreement... jointly used by Air Force aircraft will be designed to support the type of military aircraft assigned to... Transportation Safety Board, remove crashed civil aircraft from Air Force-owned pavements or property and shall...

  15. 32 CFR Attachment 4 to Part 855 - Sample Joint-Use Agreement

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... facilities for training. f. Air Force-owned airfield pavements made available for use under this Agreement... jointly used by Air Force aircraft will be designed to support the type of military aircraft assigned to... Transportation Safety Board, remove crashed civil aircraft from Air Force-owned pavements or property and shall...

  16. 32 CFR Attachment 4 to Part 855 - Sample Joint-Use Agreement

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... facilities for training. f. Air Force-owned airfield pavements made available for use under this Agreement... jointly used by Air Force aircraft will be designed to support the type of military aircraft assigned to... Transportation Safety Board, remove crashed civil aircraft from Air Force-owned pavements or property and shall...

  17. 32 CFR Attachment 4 to Part 855 - Sample Joint-Use Agreement

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... facilities for training. f. Air Force-owned airfield pavements made available for use under this Agreement... jointly used by Air Force aircraft will be designed to support the type of military aircraft assigned to... Transportation Safety Board, remove crashed civil aircraft from Air Force-owned pavements or property and shall...

  18. 32 CFR Attachment 4 to Part 855 - Sample Joint-Use Agreement

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... facilities for training. f. Air Force-owned airfield pavements made available for use under this Agreement... jointly used by Air Force aircraft will be designed to support the type of military aircraft assigned to... Transportation Safety Board, remove crashed civil aircraft from Air Force-owned pavements or property and shall...

  19. Environmental Assessment for the Auxiliary Airfield

    DTIC Science & Technology

    1988-02-18

    sor’tie would normally spend at the auxiliary airfield. No training can be accomplished during this period, and this can result in having to re- l fly...VHF) radio. T-37s are only equipped with Ultra High Frequency I7 I I (UHF) radios. Therefore, neither type aircraft can hear advisories or instructions...potential difficulties. I1 Agreements with the Alta Verde Beef Packing Company would have to be reached which would allow the government to manage waste

  20. Evaluation of Geosynthetic-Reinforced Flexible Pavements using Static Plate Load Tests

    DOT National Transportation Integrated Search

    2010-01-01

    This study focuses on the response of full-scale geogrid-reinforced flexible pavements to static surface loading. Specifically, static plate load (SPL) tests were performed on a low-volume, asphalt pavement frontage road in Eastern Arkansas, USA (the...

  1. Crack identification for rigid pavements using unmanned aerial vehicles

    NASA Astrophysics Data System (ADS)

    Bahaddin Ersoz, Ahmet; Pekcan, Onur; Teke, Turker

    2017-09-01

    Pavement condition assessment is an essential piece of modern pavement management systems as rehabilitation strategies are planned based upon its outcomes. For proper evaluation of existing pavements, they must be continuously and effectively monitored using practical means. Conventionally, truck-based pavement monitoring systems have been in-use in assessing the remaining life of in-service pavements. Although such systems produce accurate results, their use can be expensive and data processing can be time consuming, which make them infeasible considering the demand for quick pavement evaluation. To overcome such problems, Unmanned Aerial Vehicles (UAVs) can be used as an alternative as they are relatively cheaper and easier-to-use. In this study, we propose a UAV based pavement crack identification system for monitoring rigid pavements’ existing conditions. The system consists of recently introduced image processing algorithms used together with conventional machine learning techniques, both of which are used to perform detection of cracks on rigid pavements’ surface and their classification. Through image processing, the distinct features of labelled crack bodies are first obtained from the UAV based images and then used for training of a Support Vector Machine (SVM) model. The performance of the developed SVM model was assessed with a field study performed along a rigid pavement exposed to low traffic and serious temperature changes. Available cracks were classified using the UAV based system and obtained results indicate it ensures a good alternative solution for pavement monitoring applications.

  2. Krypton-85 Powered Lights for Airfield Application.

    DTIC Science & Technology

    1981-11-01

    Department of Energy.(DOE), and eight lights were fabricated for testing by actual observation under airfield conditions. Light is produced in the units...concepts of radionuclide-powered lights, the R&D program carried out, and fabrication constraints involved in the production of the experimental...visible light has been known for many years. Early use of radium mixed with zinc sulfide phosphors provided self-illuminated clock dials. The military has

  3. Overview of the Arizona Quiet Pavement Program

    NASA Astrophysics Data System (ADS)

    Donavan, Paul; Scofield, Larry

    2005-09-01

    The Arizona Quiet Pavement Pilot Program (QP3) was initially implemented to reduce highway related traffic noise by overlaying most of the Phoenix metropolitan area Portland cement concrete pavement with a one inch thick asphalt rubber friction coarse. With FHWA support, this program represents the first time that pavement surface type has been allowed as a noise mitigation strategy on federally funded projects. As a condition of using pavement type as a noise mitigation strategy, ADOT developed a ten-year, $3.8 million research program to evaluate the noise reduction performance over time. Historically, pavement surface type was not considered a permanent solution. As a result, the research program was designed to specifically address this issue. Noise performance is being evaluated through three means: (1) conventional roadside testing within the roadway corridor (e.g., far field measurements within the right-of-way) (2) the use of near field measurements, both close proximity (CPX) and sound intensity (SI); and (3) far field measurements obtained beyond the noise barriers within the surrounding neighborhoods. This paper provides an overview of the program development, presents the research conducted to support the decision to overlay the urban freeway, and the status of current research.

  4. Preliminary In-Situ Evaluation of an Innovative, Semi-Flexible Pavement Wearing Course Mixture Using Fast Falling Weight Deflectometer

    PubMed Central

    Pratelli, Chiara; Betti, Giacomo; Marradi, Alessandro

    2018-01-01

    In the last forty, years semi-flexible pavements have been successfully employed, especially in those areas subjected to heavy and slow-moving loads. They usually comprise a wearing course of Grouted Macadam, a composite pavement material that provides significant advantages in comparison to both concrete and asphalt pavements. On the other hand, the laying process of this material is a two-stage operation, and the realization complexity leads to long realization times and high initial costs. Therefore, the use of semi-flexible pavements has been limited to some fields of application and areas. Recently, an innovative material has been developed to be used as an alternative to Grouted Macadam for semi-flexible pavement wearing course realization. This material should provide similar or even superior characteristics compared to traditional Grouted Macadam. This will reduce semi-flexible pavement construction time and avoid the need for dividing the laying process. This paper presents an experimental program involving the use of FastFWD, as an APT device, to evaluate in-situ properties and performance of this material. The achieved results regarding the validation of this new material by means of FastFWD appear promising both in terms of the material’s properties and resistance to dynamic load repetitions. PMID:29659543

  5. Preliminary In-Situ Evaluation of an Innovative, Semi-Flexible Pavement Wearing Course Mixture Using Fast Falling Weight Deflectometer.

    PubMed

    Pratelli, Chiara; Betti, Giacomo; Giuffrè, Tullio; Marradi, Alessandro

    2018-04-16

    In the last forty, years semi-flexible pavements have been successfully employed, especially in those areas subjected to heavy and slow-moving loads. They usually comprise a wearing course of Grouted Macadam, a composite pavement material that provides significant advantages in comparison to both concrete and asphalt pavements. On the other hand, the laying process of this material is a two-stage operation, and the realization complexity leads to long realization times and high initial costs. Therefore, the use of semi-flexible pavements has been limited to some fields of application and areas. Recently, an innovative material has been developed to be used as an alternative to Grouted Macadam for semi-flexible pavement wearing course realization. This material should provide similar or even superior characteristics compared to traditional Grouted Macadam. This will reduce semi-flexible pavement construction time and avoid the need for dividing the laying process. This paper presents an experimental program involving the use of FastFWD, as an APT device, to evaluate in-situ properties and performance of this material. The achieved results regarding the validation of this new material by means of FastFWD appear promising both in terms of the material's properties and resistance to dynamic load repetitions.

  6. Evaluation of Surface and Subsurface Processes in Permeable Pavement Infiltration Trenches

    EPA Science Inventory

    The hydrologic performance of permeable pavement systems can be affected by clogging of the pavement surface and/or clogging at the interface where the subsurface storage layer meets the underlying soil. As infiltration and exfiltration are the primary functional mechanisms for ...

  7. Full-Scale Instrumented Testing and Analysis of Matting Systems for Airfield Parking Ramps and Taxiways

    DTIC Science & Technology

    2007-12-01

    system can only be precisely determined by examining all the materials used in the mat, their structure , orientation, dimensions, etc. and determining...ER D C/ G SL T R- 07 -3 3 Full-Scale Instrumented Testing and Analysis of Matting Systems for Airfield Parking Ramps and Taxiways Chad...ERDC/GSL TR-07-33 December 2007 Full-Scale Instrumented Testing and Analysis of Matting Systems for Airfield Parking Ramps and Taxiways Chad A

  8. Development of a non-solvent based test method for evaluating reclaimed asphalt pavement mixes.

    DOT National Transportation Integrated Search

    2004-09-01

    The percent of reclaimed asphalt pavement (RAP) used in hot mix asphalt (HMA) is currently established either by arbitrarily setting maximum percent limits, or alternatively, by evaluating both the virgin and recovered binder properties. The first ap...

  9. Slipperiness of highway pavements : phase 1, final report.

    DOT National Transportation Integrated Search

    1971-01-01

    To gain knowledge of the wet friction levels needed for various traffic conditions, this study evaluated the relationships between (1) accumulated traffic volumes and pavement friction, and (2) percent wet accidents and pavement friction. In addition...

  10. Recommended practice for accepting new concrete pavement surfaces for tire/pavement noise : designation CPSCP PP 1-11 (rev 3/1/2011).

    DOT National Transportation Integrated Search

    2011-03-01

    This practice provides guidance and example specification language intended for use by Owner- : Agencies in development of specific contract language when requiring the evaluation of : tire/pavement noise for new concrete pavement surfaces. The overa...

  11. Bird Use of Grassland Habitat Patches at a Military Airfield

    EPA Science Inventory

    In light of reported declines in grassland bird populations in North America, information about their use of airfield habitats can help inform management decisions in the context of conflicting objectives of minimizing wildlife-aircraft collisions and helping to conserve grasslan...

  12. Pavement markings and safety.

    DOT National Transportation Integrated Search

    2010-11-01

    Previous research on pavement markings from a safety perspective tackled various issues such as pavement marking retroreflectivity : variability, relationship between pavement marking retroreflectivity and driver visibility, or pavement marking impro...

  13. 32 CFR 636.10 - Hunter Army Airfield vehicle registration.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true Hunter Army Airfield vehicle registration. 636.10 Section 636.10 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY (CONTINUED) LAW ENFORCEMENT AND CRIMINAL INVESTIGATIONS MOTOR VEHICLE TRAFFIC SUPERVISION (SPECIFIC INSTALLATIONS) Fort Stewart, Georgia § 636.10 Hunter Army...

  14. Evaluating exposure of pedestrians to airborne contaminants associated with non-potable water use for pavement cleaning.

    PubMed

    Seidl, M; Da, G; Ausset, P; Haenn, S; Géhin, E; Moulin, L

    2016-04-01

    Climate change and increasing demography press local authorities to look after affordable water resources and replacement of drinking water for city necessities like street and pavement cleaning by more available raw water. Though, the substitution of drinking by non-drinking resources demands the evaluation of sanitary hazards. This article aims therefore to evaluate the contribution of cleaning water to the overall exposure of city dwellers in case of wet pavement cleaning using crossed physical, chemical and biological approaches. The result of tracer experiments with fluorescein show that liquid water content of the cleaning aerosol produced is about 0.24 g m(-3), rending possible a fast estimation of exposure levels. In situ analysis of the aerosol particles indicates a significant increase in particle number concentration and particle diameter, though without change in particle composition. The conventional bacterial analysis using total coliforms as tracer suggests that an important part of the contamination is issued from the pavement. The qPCR results show a more than 20-fold increase of background genome concentration for Escherichia coli and 10-fold increase for Enterococcus but a negligible contribution of the cleaning water. The fluorescence analysis of the cleaning aerosol confirms the above findings identifying pavement surface as the major contributor to aerosol organic load. The physical, chemical and microbiological approaches used make it possible to describe accurately the cleaning bioaerosol and to identify the existence of significantly higher levels of all parameters studied during the wet pavement cleaning. Though, the low level of contamination and the very short time of passage of pedestrian in the zone do not suggest a significant risk for the city dwellers. As the cleaning workers remain much longer in the impacted area, more attention should be paid to their chronic exposure.

  15. Evaluation of Reclaimed Rubber in Bituminous Pavements

    DOT National Transportation Integrated Search

    1995-06-01

    Section 1038 of the 1991 Intermodal Surface Transportation Efficiency Act (ISTEA) mandated use of crumb rubber from scrap tires in asphalt pavement starting in FY 94. To gain some experience, the Illinois Department of Transportation (IDOT) construct...

  16. Highway concrete pavement technology development and testing. Volume I, Field evaluation of strategic highway research program (SHRP) C-202 test sites (alkali-silica reactions (ASR))

    DOT National Transportation Integrated Search

    2006-08-01

    This study consists of continued field evaluations of treatments to four pavements suffering from distress due to alkali-silica reaction (ASR). One set of treatments was evaluated on existing pavements in Delaware, California, and Nevada that already...

  17. Evaluation of performance and cost-effectiveness of thin pavement surface treatments : interim report #2.

    DOT National Transportation Integrated Search

    1990-01-01

    This is the second report to result from the subject study. It represents the first major effort to evaluate the available data on "thin pavement surface treatments" in Oregon and to define "cost effectiveness" for this purpose. The 87 projects studi...

  18. Improving safety in pavement field testing [project summary].

    DOT National Transportation Integrated Search

    2017-09-01

    As part of its pavement evaluation program, the Florida Department of Transportation drives over 500,000 miles annually in its mission to collect pavement condition and performance data. Some of this work is conducted by vehicles that often travel at...

  19. Performance evaluation of precast prestressed concrete pavement.

    DOT National Transportation Integrated Search

    2007-11-01

    This report describes in detail an experimental investigation of an innovative precast prestressed concrete pavement (PPCP) system used to rehabilitate a 1,000 ft. section of interstate highway located on the northbound lanes of I-57 near Charleston,...

  20. Evaluation of the MIT-Scan-T2 for non-destructive PCC pavement thickness determination.

    DOT National Transportation Integrated Search

    2008-07-01

    The MIT-Scan-T2 device is marketed as a non-destructive way to determine pavement thickness on both : HMA and PCC pavements. PCC pavement thickness determination is an important incentivedisincentive : measurement for the Iowa DOT and contractors. Th...

  1. Evaluating the effectiveness of performance based pavement marking maintenance contracts in Texas.

    DOT National Transportation Integrated Search

    2014-01-01

    Performance-based pavement marking maintenance contracts (PBPMMCs) are one of the latest : mechanisms used to maintain adequate pavement marking performance levels. TxDOT has issued two : PBPMMCs, but the effectiveness of these contracts as compared ...

  2. Evaluation of permeable pavement responses to urban surface runoff.

    PubMed

    Kamali, Meysam; Delkash, Madjid; Tajrishy, Massoud

    2017-02-01

    The construction of permeable pavement (PP) in sidewalks of urban areas is an alternative low impact development (LID) to control stormwater runoff volume and consequently decrease the discharge of pollutants in receiving water bodies. In this paper, some laboratory experiments were performed to evaluate the efficiency of a PP subjected to sediment loadings during its life span. Simple infiltration models were validated by the laboratory experiments to evaluate the trend and extend of PP infiltration capacity throughout the life of the pavement operation. In addition, performances of the PP in removing total suspended solids (TSS) and selective nutrient pollutants such as NO 3 - ,NH 4 + and PO 4 -3 from the surface runoff have been investigated. Experimental data showed that the PP was completely clogged after seven hydrological years. The model revealed that the ratio of horizontal to vertical hydraulic conductivity is 3.5 for this PP. Moreover, it was found that 20% reduction in hydraulic conductivity occurred after three hydrological years. The PP showed 100%, 23% and 59% efficiencies in sediment retention (TSS removal), (PO 4 -3 ), and N-NH 4 + removal during the entire study, respectively. However, the removal efficiency of (N-NO 3 - ) was -12% and we suspect the increase in effluent (N-NO 3 - ) is due to the nitrification process in subsurface layers. This study demonstrated that when PPs are annually cleaned, it is expected that PPs can function hydraulically and be able to remove particulate pollutants during their life span by a proper maintenance. Copyright © 2016 Elsevier Ltd. All rights reserved.

  3. Prestressed pavement rehabilitation.

    DOT National Transportation Integrated Search

    2009-06-23

    In 1989, a landmark pavement project was opened to traffic in Blair County, Pennsylvania, that received national attention. The pavement was a two-mile section of prestressed concrete pavement that was constructed on the northbound lanes of what is n...

  4. Pavement evaluation using a portable lightweight deflectometer.

    DOT National Transportation Integrated Search

    2012-12-01

    The use of Zorn ZFG-3000 portable Lightweight Deflectometer (LWD) in the in-situ : assessment of pavement quality was investigated in this research. A lower load and a : shorter load pulse duration are used in a LWD as compared to a Falling Weight : ...

  5. Quantitative analysis of microtubule orientation in interdigitated leaf pavement cells

    PubMed Central

    Akita, Kae; Higaki, Takumi; Kutsuna, Natsumaro; Hasezawa, Seiichiro

    2015-01-01

    Leaf pavement cells are shaped like a jigsaw puzzle in most dicotyledon species. Molecular genetic studies have identified several genes required for pavement cells morphogenesis and proposed that microtubules play crucial roles in the interdigitation of pavement cells. In this study, we performed quantitative analysis of cortical microtubule orientation in leaf pavement cells in Arabidopsis thaliana. We captured confocal images of cortical microtubules in cotyledon leaf epidermis expressing GFP-tubulinβ and quantitatively evaluated the microtubule orientations relative to the pavement cell growth axis using original image processing techniques. Our results showed that microtubules kept parallel orientations to the growth axis during pavement cell growth. In addition, we showed that immersion treatment of seed cotyledons in solutions containing tubulin polymerization and depolymerization inhibitors decreased pavement cell complexity. Treatment with oryzalin and colchicine inhibited the symmetric division of guard mother cells. PMID:26039484

  6. Quantitative analysis of microtubule orientation in interdigitated leaf pavement cells.

    PubMed

    Akita, Kae; Higaki, Takumi; Kutsuna, Natsumaro; Hasezawa, Seiichiro

    2015-01-01

    Leaf pavement cells are shaped like a jigsaw puzzle in most dicotyledon species. Molecular genetic studies have identified several genes required for pavement cells morphogenesis and proposed that microtubules play crucial roles in the interdigitation of pavement cells. In this study, we performed quantitative analysis of cortical microtubule orientation in leaf pavement cells in Arabidopsis thaliana. We captured confocal images of cortical microtubules in cotyledon leaf epidermis expressing GFP-tubulinβ and quantitatively evaluated the microtubule orientations relative to the pavement cell growth axis using original image processing techniques. Our results showed that microtubules kept parallel orientations to the growth axis during pavement cell growth. In addition, we showed that immersion treatment of seed cotyledons in solutions containing tubulin polymerization and depolymerization inhibitors decreased pavement cell complexity. Treatment with oryzalin and colchicine inhibited the symmetric division of guard mother cells.

  7. Evaluation of the Performance of Texas Pavements Made with Different Coarse Aggregates

    DOT National Transportation Integrated Search

    2000-10-01

    This report summarizes 23 years of work undertaken in Texas to understand the reasons for significant performance differences found in pavements placed around the state. To a significant degree, pavement performance can be predicted based on the conc...

  8. Evaluating the effects of concrete pavement curling and warping on ride quality.

    DOT National Transportation Integrated Search

    2015-09-01

    Construction of a jointed concrete pavement on US 34 near Greeley, Colorado in 2012 led to an investigation of slab curling : and warping that appeared to be contributing to undesirable levels of pavement roughness. Specifically, the westbound lanes ...

  9. Assessment of highway pavements using GPR

    NASA Astrophysics Data System (ADS)

    Plati, Christina; Loizos, Andreas

    2015-04-01

    separately or in combination with other NDT methods, but even for them there is still a room for improvement and there is still need to set stricter regulations Comparisons between radar results and ground truth data produce evidence in support of the statement that the accuracy and reliability of radar results is sufficient for facing many issues related to the evaluation of asphalt pavements. Thus, benefits and limits of this method are shown and recommendations for GPR inspections are presented. Acknowledgments: This work benefited from networking activities carried out within the EU funded COST Action TU1208 "Civil Engineering Applications of Ground Penetrating Radar."

  10. Pavement warranty program in Wisconsin : 12-year evaluation, final report, June 2009.

    DOT National Transportation Integrated Search

    2009-06-01

    The Wisconsin Department of Transportation (WisDOT) first used pavement warranties in 1995. The intent of this study was to compare performance and cost data for WisDOT pavements constructed under warranty and standard contracts to determine the cost...

  11. Evaluation of Three Porous Pavement Systems in a Newly Constructed Parking Lot

    EPA Science Inventory

    This project examines porous pavement systems in a newly constructed parking lot next to Building 205 at the Edison Environmental Center. Porous pavement systems are one means of promoting environmental sustainability through stormwater runoff reduction. This project examines t...

  12. Evaluation of the effectiveness of pressure relief joints in reinforced concrete pavements.

    DOT National Transportation Integrated Search

    1976-01-01

    Reported are studies of the effectiveness of a 4-inch (100 mm) wide compressible material installed at 1,000-ft. (305 m) intervals in a jointed, reinforced concrete pavement in reducing pavement blowups. The studies were made on an Interstate highway...

  13. Evaluating the need to seal thermal cracks in Alaska's asphalt concrete pavements.

    DOT National Transportation Integrated Search

    2013-04-01

    The AKDOT&PF has promoted routine sealing of all cracks in asphalt concrete (AC) pavements for many years. In doing so, : AKDOT&PF follows the generally accepted best practice of sealing pavement cracks to the extent that time and money allows....

  14. Evaluation of hydraulic cement concrete overlays placed on three pavements in Virginia.

    DOT National Transportation Integrated Search

    2000-08-01

    Three hydraulic cement concrete pavement overlays were placed in the summer of 1995 at three locations in Virginia. Two of the overlays were placed on continuously reinforced concrete pavement to prevent spalling caused by a shy cover over the reinfo...

  15. Fifteen year performance review of Michigan's European concrete pavement.

    DOT National Transportation Integrated Search

    2010-02-01

    In 1993, a special pavement demonstration project was constructed in Detroit on NB I-75 to evaluate the design features of some highly acclaimed European rigid pavements. The Michigan Department of Transportation (MDOT) and the Federal Highway Admini...

  16. Twenty year performance review of Michigan's European concrete pavement.

    DOT National Transportation Integrated Search

    2013-10-01

    In 1993, a special pavement demonstration project was constructed in Detroit on NB I-75 to evaluate the design features of some highly acclaimed European rigid pavements. The Michigan Department of Transportation (MDOT) and the Federal Highway Admini...

  17. A Study Of In-Place Rutting Of Asphalt Pavements

    DOT National Transportation Integrated Search

    1989-01-01

    The objective of this study was to evaluate in-place pavements experiencing rutting and pavements experiencing no rutting to begin to classify asphalt mixtures that should perform satisfactorily and those that would likely rut under traffic. The info...

  18. Use of NDE to Evaluate Reflection Cracking in Airfield Pavements

    DTIC Science & Technology

    1985-11-01

    8217 ............................................................................ 71. Mudjacking - Slabjacking - Timejacking - Subsealing, Maintenance Aid Digest, MAD 2...Record No. 11, Highway Research Board Washington, D.C., 1963. 73. Slater, D., "Washington’s Shoulder Mudjacking Rescues Depressed Pave- ments," Rural and

  19. Landing-Zone and Drop-Zone Criteria

    DTIC Science & Technology

    2017-05-01

    orientation. UFC 3-260-01 does not discuss pavement design or required soil struc- tural or bearing capacity of a site to support aircraft operations...UFC 3- 260-02: Pavement Design for Airfields (USACE 2001) presents this. The criteria in UFC 3-260-02 are beyond the scope of this review. 2.1.2...crete surface course designed as a structural member with weather- and abrasion-resistant properties • A rigid pavement , or one that contains Portland

  20. Landing Zone and Drop Zone Criteria

    DTIC Science & Technology

    2017-05-01

    orientation. UFC 3-260-01 does not discuss pavement design or required soil struc- tural or bearing capacity of a site to support aircraft operations...UFC 3- 260-02: Pavement Design for Airfields (USACE 2001) presents this. The criteria in UFC 3-260-02 are beyond the scope of this review. 2.1.2...crete surface course designed as a structural member with weather- and abrasion-resistant properties • A rigid pavement , or one that contains Portland

  1. Analysis relating to pavement material characterizations and their effects on pavement performance.

    DOT National Transportation Integrated Search

    1998-01-01

    This report presents the analysis conducted on relating pavement performance or response measures and design considerations to specific pavement layers utilizing data contained in the Long-Term Pavement Performance Program National Information Manage...

  2. Quantifying Evaporation and Evaluating Runoff Estimation Methods in a Permeable Pavement System

    EPA Science Inventory

    The U.S. Environmental Protection Agency constructed a 0.4-ha parking lot in Edison, New Jersey, that incorporated permeable pavement in the parking lanes which were designed to receive run-on from the impervious hot-mix asphalt driving lanes. Twelve lined permeable pavement sec...

  3. Evaluation of composite pavement unbonded overlays : phase III.

    DOT National Transportation Integrated Search

    2007-08-01

    In recent years, thin whitetopping has evolved as a viable rehabilitation technique for deteriorated asphalt cement concrete (ACC) pavements. Numerous projects have been constructed and tested, allowing researchers to identify the important elements ...

  4. Evaluation of acceptance strength tests for concrete pavements.

    DOT National Transportation Integrated Search

    2005-06-30

    The North Carolina Department of Transportation has used traditionally flexural strength tests for acceptance : testing of Portland cement concrete pavements. This report summarizes a research project implemented to : investigate the feasibility of u...

  5. A pavement management research program for Oregon highways : final report.

    DOT National Transportation Integrated Search

    1989-12-01

    An extensive program was developed to measure pavement deflection skid resistance, and rideability throughout Oregon. The data from those "objective" measures were then evaluated for correlations with observed pavement distress and traffic factors. :...

  6. Preconstruction Biogeochemical Analysis of Mercury in Wetlands Bordering the Hamilton Army Airfield (HAAF) Wetlands Restoration Site. Part 3

    DTIC Science & Technology

    2009-12-01

    ER D C/ EL T R- 09 -2 1 Preconstruction Biogeochemical Analysis of Mercury in Wetlands Bordering the Hamilton Army Airfield (HAAF) Wetlands...Preconstruction Biogeochemical Analysis of Mercury in Wetlands Bordering the Hamilton Army Airfield (HAAF) Wetlands Restoration Site Part 3 Elly P. H... mercury methylation and demethylation, and biogeochemical parameters related to the mercury cycle as measured by both conventional and emerging methods

  7. Modeling the Hydrologic Processes of a Permeable Pavement System

    EPA Science Inventory

    A permeable pavement system can capture stormwater to reduce runoff volume and flow rate, improve onsite groundwater recharge, and enhance pollutant controls within the site. A new unit process model for evaluating the hydrologic performance of a permeable pavement system has be...

  8. Evaluation of reclaimed asphalt pavement for surface mixtures.

    DOT National Transportation Integrated Search

    2012-03-01

    The Indiana Department of Transportation has successfully used Reclaimed Asphalt Pavement (RAP) for decades because of its economic : and environmental benefits. Because of uncertainties regarding the types of aggregates contained in RAP and their re...

  9. Calibration of pavement response models for the mechanistic-empirical pavement design method

    DOT National Transportation Integrated Search

    2007-09-01

    Most pavement design methodologies assume that the tire-pavement contact stress is equal to the tire inflation pressure and uniformly distributed over a circular contact area. However, tire-pavement contact area is not in a circular shape and the con...

  10. Evaluation of MIT-SCAN-T2 for Thickness Quality Control for PCC and HMA Pavements

    DOT National Transportation Integrated Search

    2018-02-01

    Thickness is currently a pay item for PCC pavements and a quality control item for both PCC and HMA pavements. A change in pavement thickness of 0.5 in. can result in a change of multiple years of service. Current thickness measurements are performed...

  11. Changes in the Albedo of the Pegasus and Phoenix Runways, 2000-2017

    DTIC Science & Technology

    2017-07-18

    further reducing pavement strength and promoting more melting. To prevent or delay reaching the melt tipping point, it is critical to maintain the...2013. McMurdo Consolidated Airfields Study: Phase I, Basis of Design . ERDC/CRREL TR-13-5. Hanover, NH: U.S. Army Engineer Research and Development...Center. Haehnel, R., M. A. Knuth, T. Melendy, C. Hiemstra, and R. Davis. 2014. Design and Implementation of a Consolidated Airfield at McMurdo

  12. Performance and cost effectiveness of permeable friction course (PFC) pavements.

    DOT National Transportation Integrated Search

    2013-02-01

    In this project, the research team evaluated the performance of Permeable Friction Courses (PFC) over time and compared it against other types of wearing surface pavement layers. Several pavement sections including Asphalt Rubber (AR) PFCs, Performan...

  13. Evaluation of raised pavement markers for roadway delineation.

    DOT National Transportation Integrated Search

    1976-01-01

    Reduced visibility on the highway due to adverse weather conditions results in an inability of motorists to readily observe pavement markings, signs, and vehicles. The condition that presents the most serious restriction is fog, although rainfall dur...

  14. Ground penetrating radar evaluation of new pavement density.

    DOT National Transportation Integrated Search

    2015-02-01

    The objective of this project was to map pavement surface density variations using dielectric : measurements from ground penetrating radar (GPR). The work was carried out as part of an : Asphalt Intelligent Compaction demonstration project on SR 539 ...

  15. Rehabilitation of jointed Portland cement concrete pavements : SPS-6--initial evaluation and analysis

    DOT National Transportation Integrated Search

    2005-10-01

    The Specific Pavement Studies 6 (SPS-6) experiment, "Rehabilitation of Jointed Portland Cement Concrete Pavements," was designed as a controlled field experiment that focuses on the study of specific rehabilitation design features of jointed plain co...

  16. Pavement condition model based on automated pavement distress surveys.

    DOT National Transportation Integrated Search

    2014-05-01

    Many government agencies and private consulting companies must deal with the issue of : pavement maintenance. The ability to maintain an in-service pavement structure in : acceptable condition from structural and functional points of view is related ...

  17. Fatigue cracking in road pavement

    NASA Astrophysics Data System (ADS)

    Mackiewicz, P.

    2018-05-01

    The article presents the problem of modelling fatigue phenomena occurring in the road pavement. The example of two selected pavements shows the changes occurring under the influence of the load in different places of the pavement layers. Attention is paid to various values of longitudinal and transverse strains generated at the moment of passing the wheel on the pavement. It was found that the key element in the crack propagation analysis is the method of transferring the load to the pavement by the tire and the strain distribution in the pavement. During the passage of the wheel in the lower layers of the pavement, a complex stress state arises. Then vertical, horizontal and tangent stresses with various values appear. The numerical analyses carried out with the use of finite element methods allowed to assess the strain and stress changes occurring in the process of cracking road pavement. It has been shown that low-thickness pavements are susceptible to fatigue cracks arising "bottom to top", while pavements thicker are susceptible to "top to bottom" cracks. The analysis of the type of stress allowed to determine the cracking mechanism.

  18. Evaluating the Effect of Slab Curling on IRI for South Carolina Concrete Pavements

    DOT National Transportation Integrated Search

    2010-10-01

    Concrete pavements are known to curl due to a temperature gradient within the concrete caused by both daily : and seasonal temperature variations. This research project measured the magnitude of concrete pavement slab : curling of two newly construct...

  19. Recommendations for extending asphalt pavement surface life within Washington State.

    DOT National Transportation Integrated Search

    2016-10-01

    This study identifies and evaluates hot mix asphalt (HMA) mix design and construction techniques with potential for improving WSDOT pavement surface life. WSDOT pavement failure mechanisms are found to be predominantly cracking. Rutting may reach a f...

  20. Evaluating the effectiveness of converging chevron pavement markings.

    DOT National Transportation Integrated Search

    2010-10-01

    Converging chevron pavement markings have recently seen rising interest in the United States as a : means to reduce speeds at high-speed locations in a desire to improve safety performance. This report : presents an investigation into the effectivene...

  1. Use of precast slabs for pavement rehabilitation on I-66.

    DOT National Transportation Integrated Search

    2012-06-01

    Highway agencies continuously strive to expedite pavement construction and repairs and to evaluate materials and : methods to provide long-lasting pavements. As part of this effort, agencies have used precast concrete slabs for more than 10 : years w...

  2. Accelerated load testing of geosynthetic base reinforced pavement test sections.

    DOT National Transportation Integrated Search

    2011-02-01

    The main objective of this research is to evaluate the benefits of geosynthetic stabilization and reinforcement of subgrade/base aggregate layers in flexible pavements built on weak subgrades and the effect of pre-rut pavement sections, prior to the ...

  3. 0-6683 : develop a pavement project evaluation index to support the 4-year pavement management plan.

    DOT National Transportation Integrated Search

    2013-08-01

    A pavement management plan (PMP) identifies : candidate maintenance and rehabilitation (M&R) : projects for a particular roadway network over a : multi-year planning period. The PMP is a living : document because projects are reevaluated and : reprio...

  4. Structural factors of jointed plain concrete pavements : SPS-2--initial evaluation and analysis

    DOT National Transportation Integrated Search

    2005-04-01

    The SPS-2 experiment, "Strategic Study of Structural Factors for Jointed Plain Concrete Pavements (JPCP)," is one of the key components of the Long Term Pavement Performance (LTPP) program. The main objective of this experiment is to determine the re...

  5. Evaluating the need to seal thermal cracks in Alaska's asphalt concrete pavements : [summary].

    DOT National Transportation Integrated Search

    2013-04-01

    The AKDOT&PF has promoted routine sealing of all cracks in asphalt concrete (AC) pavements for many years. In doing so, : AKDOT&PF follows the generally accepted best practice of sealing pavement cracks to the extent that time and money allows....

  6. Thermal stability analysis under embankment with asphalt pavement and cement pavement in permafrost regions.

    PubMed

    Junwei, Zhang; Jinping, Li; Xiaojuan, Quan

    2013-01-01

    The permafrost degradation is the fundamental cause generating embankment diseases and pavement diseases in permafrost region while the permafrost degradation is related with temperature. Based on the field monitoring results of ground temperature along G214 Highway in high temperature permafrost regions, both the ground temperatures in superficial layer and the annual average temperatures under the embankment were discussed, respectively, for concrete pavements and asphalt pavements. The maximum depth of temperature field under the embankment for concrete pavements and asphalt pavements was also studied by using the finite element method. The results of numerical analysis indicate that there were remarkable seasonal differences of the ground temperatures in superficial layer between asphalt pavement and concrete pavement. The maximum influencing depth of temperature field under the permafrost embankment for every pavement was under the depth of 8 m. The thawed cores under both embankments have close relation with the maximum thawed depth, the embankment height, and the service time. The effective measurements will be proposed to keep the thermal stabilities of highway embankment by the results.

  7. Thermal Stability Analysis under Embankment with Asphalt Pavement and Cement Pavement in Permafrost Regions

    PubMed Central

    Jinping, Li; Xiaojuan, Quan

    2013-01-01

    The permafrost degradation is the fundamental cause generating embankment diseases and pavement diseases in permafrost region while the permafrost degradation is related with temperature. Based on the field monitoring results of ground temperature along G214 Highway in high temperature permafrost regions, both the ground temperatures in superficial layer and the annual average temperatures under the embankment were discussed, respectively, for concrete pavements and asphalt pavements. The maximum depth of temperature field under the embankment for concrete pavements and asphalt pavements was also studied by using the finite element method. The results of numerical analysis indicate that there were remarkable seasonal differences of the ground temperatures in superficial layer between asphalt pavement and concrete pavement. The maximum influencing depth of temperature field under the permafrost embankment for every pavement was under the depth of 8 m. The thawed cores under both embankments have close relation with the maximum thawed depth, the embankment height, and the service time. The effective measurements will be proposed to keep the thermal stabilities of highway embankment by the results. PMID:24027444

  8. [Effects of aircraft noise on preschool children's misbehaviours: results of research around the Kadena and Futenma airfields in Okinawa].

    PubMed

    Tokuyama, Tomohiro; Matsui, Toshihito; Hiramatsu, Kozo; Miyakita, Takashi; Ito, Akiyoshi; Yamamoto, Takeo

    2009-01-01

    To investigate the association between aircraft noise exposure as expressed by Weighted Equivalent Continuous Perceived Noise Level (WECPNL) and preschool children's misbehaviours around the Kadena and Futenma airfields in Okinawa. A questionnaire survey on children's misbehaviour was conducted in nursery schools and kindergartens around the Kadena and Futenma airfields. The children living around the Kadena airfield were divided into four groups according to WECPNL at their residences and those around the Futenma airfield into three groups according to WECPNL. The subjects were 1,888 male and female preschool children, 3 to 6 years of age, whose parents, caregivers, and teachers answered the questions. The answers used for the analysis were limited to those of respondents fulfilling the following conditions: parents living with their children, fathers with a daytime job, and mothers with a daytime job or no job. Thus, the number of valid answers was 1,213. The responses were analysed using logistic regression models taking the number of misbehaviours related to the items of Biological Function, Social Standard, Physical Constitution, Movement Habit, or Character as the dependent variables, and WECPNL, age, sex, size of family, birth order, mother's age at birth, mother's job, caregiver's career, and category of subject as the independent variables. A significant dose-response relationship was found between the odds ratio and WECPNL for the outcomes of Physical Constitution around the Kadena and Futenma airfields. It would be reasonable to conclude that the aircraft noise exposure is a factor that increases the number of preschool children's misbehaviours.

  9. Assessment of asphalt concrete reinforcement grid in flexible pavements : final report.

    DOT National Transportation Integrated Search

    2016-05-01

    This report investigated the application of accepted methods of pavement structural evaluation to independently assess the potential structural benefit of asphalt geogrid reinforcement of an operational flexible highway pavement. The asphalt interlay...

  10. Validation of FRP Matting Requirements

    DTIC Science & Technology

    2016-08-01

    airfield pavements using crushed stone. A side-by-side comparison between FRP and folded fiberglass matting (FFM) was performed on simulated small...medium, and large craters in Portland cement concrete and asphalt concrete pavements . The demonstration took place at the Silver Flag Exercise Site...report are not to be construed as an official Department of the Army position unless so designated by other authorized documents. DESTROY THIS

  11. Defining Efficient Stress Transfer in Binary Particle Systems Using Numerical Simulation

    DTIC Science & Technology

    2016-11-01

    respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other...Ernest S. Berney IV. The work was performed by the Airfields and Pavements Branch (APB) of the Engineering Sciences and Mobility Division (ESMD), U.S...0.542492 kilograms per square meter ERDC/GSL TR-16-29 1 1 Introduction The design and evaluation of engineered granular media requires an

  12. Pavement marking demonstration projects : state of Alaska and state of Tennessee.

    DOT National Transportation Integrated Search

    2013-11-01

    This project evaluates the safety impacts, environmental impacts, and cost effectiveness of different pavement marking : systems as well as the effect of State bidding and procurement processes on the quality of pavement marking material : employed i...

  13. Investigation of accident reduction by grooved concrete pavement : final report.

    DOT National Transportation Integrated Search

    1979-06-01

    This report is a category 2 experimental project evaluation written in conjunction with EHS-I-10-3(93)158 and EHS-I-12-1(44)0 contracted to groove hardened PCC pavement. In it the wear characteristics, pavement texture, skid resistance, and the accid...

  14. Greenhouse Gas Emissions from Asphalt Pavement Construction: A Case Study in China.

    PubMed

    Ma, Feng; Sha, Aimin; Lin, Ruiyu; Huang, Yue; Wang, Chao

    2016-03-22

    In China, the construction of asphalt pavement has a significant impact on the environment, and energy use and greenhouse gas (GHG) emissions from asphalt pavement construction have been receiving increasing attention in recent years. At present, there is no universal criterion for the evaluation of GHG emissions in asphalt pavement construction. This paper proposes to define the system boundaries for GHG emissions from asphalt pavement by using a process-based life cycle assessment method. A method for evaluating GHG emissions from asphalt pavement construction is suggested. The paper reports a case study of GHG emissions from a typical asphalt pavement construction project in China. The results show that the greenhouse gas emissions from the mixture mixing phase are the highest, and account for about 54% of the total amount. The second highest GHG emission phase is the production of raw materials. For GHG emissions of cement stabilized base/subbase, the production of raw materials emits the most, about 98%. The GHG emission for cement production alone is about 92%. The results indicate that any measures to reduce GHG emissions from asphalt pavement construction should be focused on the raw materials manufacturing stage. If the raw materials production phase is excluded, the measures to reduce GHG emissions should be aimed at the mixture mixing phase.

  15. Friction evaluation of concrete paver blocks for airport pavement applications

    NASA Technical Reports Server (NTRS)

    Yager, Thomas J.

    1992-01-01

    The development and use of concrete paver blocks is reviewed and some general specifications for application of this type of pavement surface at airport facilities are given. Two different shapes of interlocking concrete paver blocks installed in the track surface at NASA Langley's Aircraft Landing Dynamics Facility (ALDF) are described. Preliminary cornering performance results from testing of 40 x 14 radial-belted and bias-ply aircraft tires are reviewed. These tire tests are part of a larger, ongoing joint NASA/FAA/Industry Surface Traction and Radial Tire (START) Program involving several different tire sizes. Both dry and wet surface conditions were evaluated on the two concrete paver block test surfaces and a conventional, nongrooved Portland cement concrete surface. Future test plans involving evaluation of other concrete paver block designs at the ALDF are indicated.

  16. Pavement Structural Evaluation at the Network Level: Final Report

    DOT National Transportation Integrated Search

    2016-09-01

    As State transportation departments consider structural adequacy as part of their routine pavement management system (PMS) activities by incorporating deflection testing, it is important to advance their practices from measuring deflection using fall...

  17. Preparation of the implementation plan of AASHTO Mechanistic-Empirical Pavement Design Guide (M-EPDG) in Connecticut : Phase II : expanded sensitivity analysis and validation with pavement management data.

    DOT National Transportation Integrated Search

    2017-02-08

    The study re-evaluates distress prediction models using the Mechanistic-Empirical Pavement Design Guide (MEPDG) and expands the sensitivity analysis to a wide range of pavement structures and soils. In addition, an extensive validation analysis of th...

  18. Long-term stormwater quantity and quality performance of permeable pavement systems.

    PubMed

    Brattebo, Benjamin O; Booth, Derek B

    2003-11-01

    This study examined the long-term effectiveness of permeable pavement as an alternative to traditional impervious asphalt pavement in a parking area. Four commercially available permeable pavement systems were evaluated after 6 years of daily parking usage for structural durability, ability to infiltrate precipitation, and impacts on infiltrate water quality. All four permeable pavement systems showed no major signs of wear. Virtually all rainwater infiltrated through the permeable pavements, with almost no surface runoff. The infiltrated water had significantly lower levels of copper and zinc than the direct surface runoff from the asphalt area. Motor oil was detected in 89% of samples from the asphalt runoff but not in any water sample infiltrated through the permeable pavement. Neither lead nor diesel fuel were detected in any sample. Infiltrate measured 5 years earlier displayed significantly higher concentrations of zinc and significantly lower concentrations of copper and lead.

  19. Evaluation of full depth asphaltic concrete pavements : interim report.

    DOT National Transportation Integrated Search

    1975-02-01

    This report provides a review of the performance and structural characteristics exhibited on two full depth asphaltic concrete pavement projects constructed on the Louisiana interstate system. : The roughness characteristics of both full depth projec...

  20. No Further Action Decision Under CERCLA, Study Area 31, Moore Army Airfield Fire Fighting Training Area, Fort Devens, Massachusetts

    DTIC Science & Technology

    1995-01-01

    FURTHER ACTION DECISION UNDER CERCLAI STUDY AREA 31 MOORE ARMY AIRFIELD FIRE FIGHTING TRAINING AREA FORT DEVENS , MASSACHUSETFS TABLE OF CONTENTS jSection...Inc. 31DD.DOC 6917.11 111,, NO FURTHER ACTION DECISION UNDER CERCLA I STUDY AREA 31 MOORE ARMY AIRFIELD FIRE FIGHTING TRAINING AREA 3 FORT DEVENS ...Fire Fighting Training Area) at Fort Devens , Massachusetts, have resulted in the decision that no further studies or remediation are required at this

  1. Proceedings. National conference on preservation, repair, and rehabilitation of concrete pavements, St. Louis, Missouri, April 21-24, 2009.

    DOT National Transportation Integrated Search

    2009-01-01

    Part 1Pavement Condition Evaluation, Impact, and Durability; Part 2Concrete Pavement Preservation, Repair, and Rehabilitation; Part 3Concrete Pavement Repair Techniques and Experiences; Part 4Concrete Pavement Surface Texture; Part 5Emergin...

  2. Thule Air Base Airfield White Painting and Permafrost Investigation. Phases I-IV

    DTIC Science & Technology

    2013-06-01

    Thaw settlement—fill thickness vs. box section .......................................................... 15  3.2.2  White Pavement ...33 Figure 29. Subsurface temperatures measured at the “White Pavement ” site ................................ 34 Figure 30. Subsurface...temperatures measured at “Black Pavement ” site. ...................................... 34 Figure 31. Subsurface temperatures at a permanent station in fill

  3. Thule Air Base Airfield White Painting and Permafrost Investigation. Phases 1-4

    DTIC Science & Technology

    2013-06-01

    Thaw settlement—fill thickness vs. box section .......................................................... 15  3.2.2  White Pavement ...33 Figure 29. Subsurface temperatures measured at the “White Pavement ” site ................................ 34 Figure 30. Subsurface...temperatures measured at “Black Pavement ” site. ...................................... 34 Figure 31. Subsurface temperatures at a permanent station in fill

  4. SIMPAVE : evaluation of virtual environments for pavement construction simulations

    DOT National Transportation Integrated Search

    2007-05-01

    In the last couple of years, the authors have been developing virtual simulations for modeling the construction of asphalt pavements. The simulations are graphically rich, interactive, three-dimensional, with realistic physics, and allow multiple peo...

  5. Evaluation of transverse joint forming methods for PCC pavement.

    DOT National Transportation Integrated Search

    2006-01-01

    The members of the Iowa Concrete Paving Association, the National Concrete Pavement Technology Center Research Committee, and : the Iowa Highway Research Board commissioned a study to examine alternative ways of developing transverse joints in portla...

  6. Premature asphalt concrete pavement cracking.

    DOT National Transportation Integrated Search

    2015-06-01

    Recently, the Oregon Department of Transportation (ODOT) has identified hot mix asphalt concrete : (HMAC) pavements that have displayed top-down cracking within three years of construction. The objective of : the study was to evaluate the top-down cr...

  7. Statewide implementation of the total pavement acceptance device (TPAD) : final report.

    DOT National Transportation Integrated Search

    2016-07-01

    Construction and development of the Total Pavement Acceptance Device (TPAD) was completed at the end of August 2012 through TxDOT Research Project 0-6005-01. The TPAD is a multi-function pavement evaluation device used to profile continuously along p...

  8. Evaluation of Longitudinal Joints of HMA Pavements in Tennessee

    DOT National Transportation Integrated Search

    2010-05-01

    Longitudinal joints between lanes of hot-mix asphalt (HMA) pavements are commonly susceptible to moisture damage and other failures. In 2006, the Tennessee Department of Transportation (TDOT) identified longitudinal joint failure as one of the major ...

  9. Development of index based pavement performance models for pavement management system (PMS) of LADOTD : tech summary.

    DOT National Transportation Integrated Search

    2009-03-01

    A research study was initiated by the Louisiana Department of Transportation and Development (LADOTD) in conjunction with the : Federal Highway Administration (FHWA) to evaluate the overall performance and eff ectiveness of LADOTDs Pavement Manage...

  10. Premature deterioration of jointed plain concrete pavements.

    DOT National Transportation Integrated Search

    2011-04-29

    Six sections of jointed plain concrete pavements (JPCP)s throughout the state were selected as candidates for the evaluation of premature deterioration. The data used in performing the evaluation included manual and historic automated distress survey...

  11. Premature deterioration of jointed plain concrete pavements.

    DOT National Transportation Integrated Search

    2011-04-29

    Six sections of jointed plain concrete pavements (JPCP)s throughout the state were selected as : candidates for the evaluation of premature deterioration. The data used in performing the evaluation included manual : and historic automated distress su...

  12. Performance trends of rehabilitated AC pavements

    DOT National Transportation Integrated Search

    2000-10-01

    The General Pavement Study (GPS) 6 experiment, "AC Overlay of AC Pavements," involves pavement test sections where an asphalt concrete (AC) overlay was placed on an existing AC pavement. This TechBrief summarizes the results of a study of the GPS-6 e...

  13. Greenhouse Gas Emissions from Asphalt Pavement Construction: A Case Study in China

    PubMed Central

    Ma, Feng; Sha, Aimin; Lin, Ruiyu; Huang, Yue; Wang, Chao

    2016-01-01

    In China, the construction of asphalt pavement has a significant impact on the environment, and energy use and greenhouse gas (GHG) emissions from asphalt pavement construction have been receiving increasing attention in recent years. At present, there is no universal criterion for the evaluation of GHG emissions in asphalt pavement construction. This paper proposes to define the system boundaries for GHG emissions from asphalt pavement by using a process-based life cycle assessment method. A method for evaluating GHG emissions from asphalt pavement construction is suggested. The paper reports a case study of GHG emissions from a typical asphalt pavement construction project in China. The results show that the greenhouse gas emissions from the mixture mixing phase are the highest, and account for about 54% of the total amount. The second highest GHG emission phase is the production of raw materials. For GHG emissions of cement stabilized base/subbase, the production of raw materials emits the most, about 98%. The GHG emission for cement production alone is about 92%. The results indicate that any measures to reduce GHG emissions from asphalt pavement construction should be focused on the raw materials manufacturing stage. If the raw materials production phase is excluded, the measures to reduce GHG emissions should be aimed at the mixture mixing phase. PMID:27011196

  14. Vice President Pence lands at Redstone Army Airfield

    NASA Image and Video Library

    2017-09-25

    Air Force Two lands with Vice President Mike Pence along with Congressman Robert Aderholt at the Redstone Army Airfield in Huntsville, Alabama, on Monday, Sept. 25. They were greeted by NASA’s Marshall Space Flight Center Director Todd May and Redstone Arsenal’s Lt. Gen. Edward Daly. The Vice President is visiting NASA’s Marshall Center to meet with employees, view test hardware for NASA’s Space Launch System — America’s new deep-space rocket, and tour the Payload Operations Integration Center, “science central” for the International Space Station.

  15. Effects of Heavy Vehicle Characteristics on Pavement Response and Performance---Phase II

    DOT National Transportation Integrated Search

    1991-12-31

    The objective of this research was to analyze and evaluate the interaction between heavy vehicle characteristics and pavement performance for application in pavement management. Heavy vehicle (truck and bus) characteristics include tire types (bias p...

  16. Pavement scores synthesis.

    DOT National Transportation Integrated Search

    2009-02-01

    The purpose of this synthesis was to summarize the use of pavement scores by the states, including the : rating methods used, the score scales, and descriptions; if the scores are used for recommending pavement : maintenance and rehabilitation action...

  17. Evaluation of the effectiveness of converging chevron pavement markings.

    DOT National Transportation Integrated Search

    2011-10-01

    Converging chevron pavement markings have recently seen rising interest in the United States as a : means to reduce speeds at high-speed locations in a desire to improve safety performance. This report : presents an investigation into the effectivene...

  18. Extending the Service Life of Pavements

    NASA Astrophysics Data System (ADS)

    Gschwendt, Ivan

    2018-03-01

    The cost of road construction and expenditures on the maintenance of pavements, i.e., their whole life cost, represents a lot of money. The paper describes a procedure for a pavement management system with degradation models and estimates the length of time for the rehabilitation of an asphalt pavement. Using a theory of pavement mechanics, we calculated the stresses and strains on the layers of two pavement models. High modulus asphalt concrete, an asphalt mix with a high binder content, and an asphalt mix with binder modifications are new road building materials. Prolonging the time for the rehabilitation of pavements is possible.

  19. Impact of the variation in dynamic vehicle load on flexible pavement responses

    NASA Astrophysics Data System (ADS)

    Ahsanuzzaman, Md

    The purpose of this research was to evaluate the dynamic variation in asphalt pavement critical responses due to dynamic tire load variations. An attempt was also made to develop generalized regression equations to predict the dynamic response variation in flexible pavement under various dynamic load conditions. The study used an extensive database of computed pavement response histories for five different types of sites (smooth, rough, medium rough, very rough and severely rough), two different asphalt pavement structures (thin and thick) at two temperatures (70 °F and 104 °F), subjected to a tandem axle dual tire at three speeds 25, 37 and 50 mph (40, 60 and 80 km/h). All pavement responses were determined using the 3D-Move Analysis program (Version 1.2) developed by University of Nevada, Reno. A new term called Dynamic Response Coefficient (DRC) was introduced in this study to address the variation in critical pavement responses due to dynamic loads as traditionally measured by the Dynamic Load Coefficient (DLC). While DLC represents the additional varying component of the tire load, DRC represents the additional varying component of the response value (standard deviation divided by mean response). In this study, DRC was compared with DLC for five different sites based on the roughness condition of the sites. Previous studies showed that DLC varies with vehicle speed and suspension types, and assumes a constant value for the whole pavement structure (lateral and vertical directions). On the other hand, in this study, DRC was found to be significantly varied with the asphalt pavement and function of pavement structure, road roughness conditions, temperatures, vehicle speeds, suspension types, and locations of the point of interest in the pavement. A major contribution of the study is that the variation of pavement responses due to dynamic load in a flexible pavement system can be predicted with generalized regression equations. Fitting parameters (R2) in the

  20. Orion Stage Adapter move to Redstone Airfield

    NASA Image and Video Library

    2018-04-03

    NASA's Super Guppy aircraft arrives to the U.S. Army’s Redstone Airfield in Huntsville, Alabama, April 2, to pick up flight hardware for NASA’s Space Launch System – its new, deep-space rocket that will enable astronauts to begin their journey to explore destinations far into the solar system. The Guppy will depart on Tuesday, April 3 to deliver the Orion stage adapter to NASA’s Kennedy Space Center in Florida for flight preparations. On Exploration Mission-1, the first integrated flight of the SLS and the Orion spacecraft, the adapter will connect Orion to the rocket and carry 13 CubeSats as secondary payloads.

  1. Orion Stage Adapter move to Redstone Airfield

    NASA Image and Video Library

    2018-04-02

    Caption: NASA's Super Guppy aircraft arrives to the U.S. Army’s Redstone Airfield in Huntsville, Alabama, April 2, to pick up flight hardware for NASA’s Space Launch System – its new, deep-space rocket that will enable astronauts to begin their journey to explore destinations far into the solar system. The Guppy will depart on Tuesday, April 3 to deliver the Orion stage adapter to NASA’s Kennedy Space Center in Florida for flight preparations. On Exploration Mission-1, the first integrated flight of the SLS and the Orion spacecraft, the adapter will connect Orion to the rocket and carry 13 CubeSats as secondary payloads.

  2. Evaluation of Precast Portland Cement Concrete Panels for Airfield Pavement Repairs

    DTIC Science & Technology

    2015-05-01

    3 1.3 Research approach ...Figure 1.1. Research approach schematic. ................................................................................................ 4 Figure 2.1...220 Figure D.10. Locations of HWD tests pre-repair and posttest

  3. Evaluation of Warm-Mix Asphalt Technologies for Use on Airfield Pavements

    DTIC Science & Technology

    2013-12-01

    three different ways: mechanical injection of water at the plant, adding a material containing internal water, such as zeolites , and using a two...the nozzles, causing the asphalt binder to expand (Prowell and Hurley 2007). Zeolites are crystalline-hydrated aluminum silicates that are typically...sold in granular form with approximately a No. 50 mesh size and contain approximately 20% water by weight. The water is released from the zeolite

  4. Performance of Cracked and Seated Rigid Airport Pavements.

    DTIC Science & Technology

    1987-04-01

    situ properties of the cracked PCC material and of the uncracked PCC. Additionally, a visual condition survey of the pavements under investigation was...the overall pavement evaluation effort. Results of the NDT testing program were used to determine the in-situ properties of the cracked PCC material ...combined with the NDT deflection basin slopes, led to the conclusion that the cracked and seated PCC layer is behaving as a semi-rigid material . 45 OVERLAY

  5. Using recycled concrete as aggregate in concrete pavements to reduce materials cost.

    DOT National Transportation Integrated Search

    2013-08-01

    The main objective of this project was to evaluate the effects of using aggregate produced from crushed concrete pavement as a replacement for natural (virgin) coarse aggregate in pavement mixtures. A total of ten different concrete mixtures containi...

  6. GPR used in combination with other NDT methods for assessing pavements in PPP projects

    NASA Astrophysics Data System (ADS)

    Loizos, Andreas; Plati, Christina

    2014-05-01

    In the recent decades, Public-Private Partnerships (PPP) has been adopted for highway infrastructure procurement in many countries. PPP projects typically take the form of a section of highway and connecting roadways which are to be construction and managed for a given concession period. Over the course of the highway concession period, the private agency takes over the pavement maintenance and rehabilitation duties. On this purpose, it is critical to find the most cost effective way to maintain the infrastructure in compliance with the agreed upon performance measures and a Pavement Management Systems (PMS) is critical to the success of this process. For the prosperous operation of a PMS it is necessary to have appropriate procedures for pavement monitoring and evaluation, which is important in many areas of pavement engineering. Non Destructive Testing (NDT) has played a major role in pavement condition monitoring, assessments and evaluation accomplishing continuous and quick collection of pavement data. The analysis of this data can lead to indicators related to trigger values (criteria) that define the pavement condition based on which the pavement "health" is perceived helping decide whether there is the need or not to intervene in the pavement. The accomplished perception appoints required management activities for preserving pavements in favor not only of the involved highway/road agencies but also of users' service. Amongst NDT methods Ground Penetrating Radar (GPR) seems to be a very powerful toll, as it provides a range of condition and construction pavement information. It can support effectively the implementation of PMS activities in the framework of pavement monitoring and evaluation. Given that, the present work aims to the development and adaptation of a protocol for the use of GPR in combination with other NDT methods, such as Falling Weight Deflectometer (FWD), for assessing pavements in PPP projects. It is based on the experience of Laboratory of

  7. Implementation of the new AASHTO pavement design procedure in Louisiana : final report.

    DOT National Transportation Integrated Search

    1990-06-01

    This study was undertaken to provide the LA DOTD with an implementation package to facilitate adoption of the new AASHTO Guide for Design of Pavement Structures. The study included evaluation of design parameters for rigid and flexible pavements, inc...

  8. Re-Evaluation of the AASHTO-Flexible Pavement Design Equation with Neural Network Modeling

    PubMed Central

    Tiğdemir, Mesut

    2014-01-01

    Here we establish that equivalent single-axle loads values can be estimated using artificial neural networks without the complex design equality of American Association of State Highway and Transportation Officials (AASHTO). More importantly, we find that the neural network model gives the coefficients to be able to obtain the actual load values using the AASHTO design values. Thus, those design traffic values that might result in deterioration can be better calculated using the neural networks model than with the AASHTO design equation. The artificial neural network method is used for this purpose. The existing AASHTO flexible pavement design equation does not currently predict the pavement performance of the strategic highway research program (Long Term Pavement Performance studies) test sections very accurately, and typically over-estimates the number of equivalent single axle loads needed to cause a measured loss of the present serviceability index. Here we aimed to demonstrate that the proposed neural network model can more accurately represent the loads values data, compared against the performance of the AASHTO formula. It is concluded that the neural network may be an appropriate tool for the development of databased-nonparametric models of pavement performance. PMID:25397962

  9. Re-evaluation of the AASHTO-flexible pavement design equation with neural network modeling.

    PubMed

    Tiğdemir, Mesut

    2014-01-01

    Here we establish that equivalent single-axle loads values can be estimated using artificial neural networks without the complex design equality of American Association of State Highway and Transportation Officials (AASHTO). More importantly, we find that the neural network model gives the coefficients to be able to obtain the actual load values using the AASHTO design values. Thus, those design traffic values that might result in deterioration can be better calculated using the neural networks model than with the AASHTO design equation. The artificial neural network method is used for this purpose. The existing AASHTO flexible pavement design equation does not currently predict the pavement performance of the strategic highway research program (Long Term Pavement Performance studies) test sections very accurately, and typically over-estimates the number of equivalent single axle loads needed to cause a measured loss of the present serviceability index. Here we aimed to demonstrate that the proposed neural network model can more accurately represent the loads values data, compared against the performance of the AASHTO formula. It is concluded that the neural network may be an appropriate tool for the development of databased-nonparametric models of pavement performance.

  10. Comparative Study of Nondestructive Pavement Testing, MacDill Air Force Base, Florida

    DTIC Science & Technology

    1987-07-01

    a deflection-basin fitting program that prodicts moduli of the pavement layers and subgrade. A layered-elastic program AIRPOD is used in a fatigue...Layered-elastic Limiting stress in PCC; of pavement layers ( AIRPOD ) limiting strain in AC from deflection basin (ELSYM-5) (BASFIT) AFESC Elastic moduli of...need not be made. 121. Pavement evaluation computations were next accomplished using a series of computer programs referred to as ELSYM-5 and AIRPOD

  11. Nondestructive evaluation of the condition of subsurface drainage in pavements using ground penetrating radar (GPR).

    DOT National Transportation Integrated Search

    2013-11-11

    Subsurface drainage features are routinely incorporated in the design of pavement systems as they are believed to increase pavement service life provided that they are installed correctly and maintained. Maintenance, however, is challenging in that l...

  12. Onsite use of recycled asphalt pavement materials and geocells to reconstruct pavements damaged by heavy trucks.

    DOT National Transportation Integrated Search

    2011-07-01

    Asphalt pavements deteriorate with traffic (especially heavy trucks) and time. Maintenance and overlaying may solve minor to : medium pavement distress problems. When the condition of a pavement becomes badly deteriorated, reconstruction of the : pav...

  13. Evaluation of the Performance of Texas Pavements Made with Different Coarse Aggregates: Project Summary Report

    DOT National Transportation Integrated Search

    1998-09-01

    This report summarizes 23 years of work undertaken in Texas to understand the reasons for significant performance differences found in pavements placed around the state. To a significant degree, pavement performance can be predicted based on the conc...

  14. Evaluation of pavement design in Virginia based on layered deflections, subgrade and its moisture content.

    DOT National Transportation Integrated Search

    1974-01-01

    Studies were conducted to relate the deflection of flexible pavements to such environmental factors as temperature and moisture content of the pavements and their subgrade soils. Also considered were the thickness and the relative positions of the di...

  15. Analysis on mechanics response of long-life asphalt pavement at moist hot heavy loading area

    NASA Astrophysics Data System (ADS)

    Xu, Xinquan; Li, Hao; Wu, Chuanhai; Li, Shanqiang

    2018-04-01

    Based on the durability of semi-rigid base asphalt pavement test road in Guangdong Yunluo expressway, by comparing the mechanics response of modified semi-rigid base, RCC base and inverted semi-rigid base with the state of continuous, using four unit five parameter model to evaluate rut depth of asphalt pavement structure, and through commonly used fatigue life prediction model to evaluate fatigue performance of three types of asphalt pavement structure. Theoretical calculation and four years tracking observation results of test road show that rut depth of modified semi-rigid base asphalt pavement is the minimum, the road performance is the best, and the fatigue performance is the optimal.

  16. 78 FR 33965 - Establishment of Class E Airspace; Immokalee-Big Cypress Airfield, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-06

    ... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 71 [Docket No. FAA-2012-1051; Airspace Docket No. 12-ASO-39] Establishment of Class E Airspace; Immokalee-Big Cypress Airfield...: History Federal Register document FAA-2012-1051, Airspace Docket No. 12- ASO-39, published May 1, 2013...

  17. Implementation of Rolling Wheel Deflectometer (RWD) in PMS and Pavement Preservation : Tech Summary

    DOT National Transportation Integrated Search

    2012-08-01

    Evaluation of pavement structural capacity and integrity is an important component of the Pavement Management : System (PMS) to assist in the selection of suitable maintenance and rehabilitation strategies. The falling weight : defl ectometer (FWD) i...

  18. Application of high performance concrete in the pavement system : structural response of high performance concrete pavements.

    DOT National Transportation Integrated Search

    2002-03-01

    Rigid pavements make up a significant percentage of highway systems in the United States and abroad. Concrete pavements provide an economical and durable solution for highway systems, because the pavements last longer and require less maintenance. Re...

  19. MoDOT pavement preservation research program volume III, development of pavement family and treatment performance models.

    DOT National Transportation Integrated Search

    2015-10-01

    Pavement performance models describe the deterioration behavior of pavements. They are essential in a pavement management : system if the goal is to make more objective, reliable, and cost-effective decisions regarding the timing and nature of paveme...

  20. Motorist actions at a crosswalk with an in-pavement flashing light system.

    PubMed

    Karkee, Ganesh J; Nambisan, Shashi S; Pulugurtha, Srinivas S

    2010-12-01

    An in-pavement flashing light system is used at crosswalks to alert motorists and pedestrians of possible conflicts and to influence their behavior to enhance safety. The relative behaviors of the drivers and the pedestrians affect safety. An evaluation of motorist behavior at a pedestrian crosswalk with an in-pavement flashing light system is presented in this manuscript. Field observations provide the basis to evaluate motorist behavior at a crosswalk with an in-pavement flashing light system. Outcomes of pedestrian and motorists actions were observed to quantify measures of effectiveness (MOEs) such as yielding behavior of motorists, vehicle speeds, and yielding distance from the crosswalk. A before-and-after study design was used. The before condition was prior to the activation of the in-pavement flashing light system and the after condition was after the activation of the in-pavement flashing light system. The study was conducted on a relatively low-volume roadway located in the Henderson, Nevada. The significance of the differences in the MOEs between the 2 study periods was evaluated using statistical analysis tools such as a one-tailed test for proportions and the Welch-Satterthwaite t-test. The results show that the installation of the in-pavement flashing light system increased the yielding behavior of motorists significantly (P < 0.001). The vehicular speeds decreased when pedestrians were waiting at the curb to cross and when they were crossing (P < 0.001). Motorists yielded to pedestrians on an average about 3 m (∼10 feet) upstream from the yield markings and the yielding distances were consistent in both directions. The in-pavement flashing light system is seen to be effective to improve motorists' yielding behavior and the speeds of vehicles were also observed to decrease in the presence of pedestrians.

  1. Impact of pavement conditions on crash severity.

    PubMed

    Li, Yingfeng; Liu, Chunxiao; Ding, Liang

    2013-10-01

    Pavement condition has been known as a key factor related to ride quality, but it is less clear how exactly pavement conditions are related to traffic crashes. The researchers used Geographic Information System (GIS) to link Texas Department of Transportation (TxDOT) Crash Record Information System (CRIS) data and Pavement Management Information System (PMIS) data, which provided an opportunity to examine the impact of pavement conditions on traffic crashes in depth. The study analyzed the correlation between several key pavement condition ratings or scores and crash severity based on a large number of crashes in Texas between 2008 and 2009. The results in general suggested that poor pavement condition scores and ratings were associated with proportionally more severe crashes, but very poor pavement conditions were actually associated with less severe crashes. Very good pavement conditions might induce speeding behaviors and therefore could have caused more severe crashes, especially on non-freeway arterials and during favorable driving conditions. In addition, the results showed that the effects of pavement conditions on crash severity were more evident for passenger vehicles than for commercial vehicles. These results provide insights on how pavement conditions may have contributed to crashes, which may be valuable for safety improvement during pavement design and maintenance. Readers should notice that, although the study found statistically significant effects of pavement variables on crash severity, the effects were rather minor in reality as suggested by frequency analyses. Copyright © 2013 Elsevier Ltd. All rights reserved.

  2. California state of the pavement report, 1999

    DOT National Transportation Integrated Search

    2001-03-01

    This report presents the results of the 1999 Pavement Condition Survey for the State of California. It gives an overview of pavement conditions, vehicle miles traveled on rough pavements, needs classification, and pavement performance. For each of th...

  3. Mechanistic-empirical Pavement Design Guide Implementation

    DOT National Transportation Integrated Search

    2010-06-01

    The recently introduced Mechanistic-Empirical Pavement Design Guide (MEPDG) and associated computer software provides a state-of-practice mechanistic-empirical highway pavement design methodology. The MEPDG methodology is based on pavement responses ...

  4. Pollutant load removal efficiency of pervious pavements: is clogging an issue?

    PubMed

    Kadurupokune, N; Jayasuriya, N

    2009-01-01

    Pervious pavements in car parks and driveways reduce the peak runoff rate and the quantity of runoff discharged into urban drains as well as improve the stormwater quality by trapping the sediments in the infiltrated water. The paper focuses on presenting results from the laboratory tests carried out to evaluate water quality improvements and effects of long-term decrease in infiltration rates with time due to sediments trapping (clogging) within the pavement pores. Clogging was not found to be a major factor affecting pervious pavement performance after simulating 17 years of stormwater quality samples.

  5. Effect of Michigan multi-axle trucks on pavement distress and profile: volume 3.

    DOT National Transportation Integrated Search

    2009-02-01

    With the adoption of the new mechanistic-empirical pavement design method and the employment of axle load : spectra, the question of evaluating the pavement damage resulting from different axle and truck configurations has : become more relevant. In ...

  6. Effect of Michigan multi-axle trucks on pavement distress and profile : volume 1.

    DOT National Transportation Integrated Search

    2009-02-01

    With the adoption of the new mechanistic-empirical pavement design method and the employment of axle load : spectra, the question of evaluating the pavement damage resulting from different axle and truck configurations has : become more relevant. In ...

  7. Performance evaluation of Arizona's LTPP SPS-9 project : strategic study of flexible pavement binder factors.

    DOT National Transportation Integrated Search

    2015-06-01

    As part of the Long Term Pavement Performance (LTPP) Program, the Arizona Department of Transportation (ADOT) : constructed eight Specific Pavement Studies 9 (SPS9) test sections on Interstate 10 near Phoenix (04B900). SPS9A : 04B900 is an over...

  8. Permeable pavement study (Edison)

    EPA Pesticide Factsheets

    While permeable pavement is increasingly being used to control stormwater runoff, field-based, side-by-side investigations on the effects different pavement types have on nutrient concentrations present in stormwater runoff are limited. In 2009, the U.S. EPA constructed a 0.4-ha parking lot in Edison, New Jersey, that incorporated permeable interlocking concrete pavement (PICP), pervious concrete (PC), and porous asphalt (PA). Each permeable pavement type has four, 54.9-m2, lined sections that direct all infiltrate into 5.7-m3 tanks enabling complete volume collection and sampling. This paper highlights the results from a 12-month period when samples were collected from 13 rainfall/runoff events and analyzed for nitrogen species, orthophosphate, and organic carbon. Differences in infiltrate concentrations among the three permeable pavement types were assessed and compared with concentrations in rainwater samples and impervious asphalt runoff samples, which were collected as controls. Contrary to expectations based on the literature, the PA infiltrate had significantly larger total nitrogen (TN) concentrations than runoff and infiltrate from the other two permeable pavement types, indicating that nitrogen leached from materials in the PA strata. There was no significant difference in TN concentration between runoff and infiltrate from either PICP or PC, but TN in runoff was significantly larger than in the rainwater, suggesting meaningful inter-event dry de

  9. Concrete Cutting Refinement for Crater Repair

    DTIC Science & Technology

    2015-08-01

    Identification of damage sustained to the airfield operating surfaces, 2. Selection of minimum pavement surface areas required to support air- craft...also studied to identify the appropriate lineup and stop locations to achieve the desired overcut lengths. Edwards et al. (2015) recommends overcut

  10. 76 FR 59664 - Notice of Intent To Prepare an Environmental Impact Statement For Divert Activities and Exercises...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-27

    ... Mariana Islands. The proposed divert activities and exercises would involve airfield improvements designed... designed to support up to one tanker squadron of 12 KC-135 aircraft and its approximately 500 support... delivery capability; and associated pavement markings, lighting, security, and other related infrastructure...

  11. Using Value-Focused Thinking as an Alternative Means of Opportunity Assessment for Strategic Sourcing Applications

    DTIC Science & Technology

    2013-03-01

    comparison between two objectives at a time. The decision maker develops a micro - version of the value equation using only the two objectives that...variety of different functional areas. Table 10. New Alternatives Identified Alternative Source Base Recycling Services AFCEC Airfield Pavement Repair

  12. Evaluation of MIT-SCAN-T2 for thickness quality control for PCC and HMA pavements : research project capsule.

    DOT National Transportation Integrated Search

    2013-04-01

    Thickness is currently a pay item for portland cement concrete (PCC) pavements : and a quality control item for both PCC and hot mix asphalt (HMA) pavements. : A change in pavement thickness of 0.5 in. can result in a reduction of multiple : years of...

  13. Evaluation of deicer applications on open graded pavements : final report.

    DOT National Transportation Integrated Search

    2006-04-01

    The Oregon Department of Transportation (ODOT) winter maintenance practices include plowing, sanding, and applying winter anti-icing/deicing liquids. These activities are performed on dense-graded as well as open-graded pavements. During the winters ...

  14. Evaluation of a thin-bonded Portland cement concrete pavement overlay.

    DOT National Transportation Integrated Search

    1996-01-01

    This report discusses the performance of the Virginia Department of Transportation's first modern rehabilitation project involving a thin-bonded portland cement concrete overlay of an existing jointed concrete pavement. The performance of the rigid o...

  15. The Greenhouse Gas Emission from Portland Cement Concrete Pavement Construction in China.

    PubMed

    Ma, Feng; Sha, Aimin; Yang, Panpan; Huang, Yue

    2016-06-24

    This study proposes an inventory analysis method to evaluate the greenhouse gas (GHG) emissions from Portland cement concrete pavement construction, based on a case project in the west of China. The concrete pavement construction process was divided into three phases, namely raw material production, concrete manufacture and pavement onsite construction. The GHG emissions of the three phases are analyzed by a life cycle inventory method. The CO₂e is used to indicate the GHG emissions. The results show that for 1 km Portland cement concrete pavement construction, the total CO₂e is 8215.31 tons. Based on the evaluation results, the CO₂e of the raw material production phase is 7617.27 tons, accounting for 92.7% of the total GHG emissions; the CO₂e of the concrete manufacture phase is 598,033.10 kg, accounting for 7.2% of the total GHG emissions. Lastly, the CO₂e of the pavement onsite construction phase is 8396.59 kg, accounting for only 0.1% of the total GHG emissions. The main greenhouse gas is CO₂ in each phase, which accounts for more than 98% of total emissions. N₂O and CH₄ emissions are relatively insignificant.

  16. Pavement Performance : Approaches Using Predictive Analytics

    DOT National Transportation Integrated Search

    2018-03-23

    Acceptable pavement condition is paramount to road safety. Using predictive analytics techniques, this project attempted to develop models that provide an assessment of pavement condition based on an array of indictors that include pavement distress,...

  17. Effect of Michigan multi-axle trucks on pavement distress and profile: volume 2.

    DOT National Transportation Integrated Search

    2009-02-01

    With the adoption of the new mechanistic-empirical pavement design method and the employment of axle load spectra, the question of evaluating the pavement damage resulting from different axle and truck configurations has become more relevant. In part...

  18. Characterization of cementitiously stabilized subgrades for mechanistic-empirical pavement design

    NASA Astrophysics Data System (ADS)

    Solanki, Pranshoo

    Pavements are vulnerable to subgrade layer performance because it acts as a foundation. Due to increase in the truck traffic, pavement engineers are challenged to build more strong and long-lasting pavements. To increase the load-bearing capacity of pavements, subgrade layer is often stabilized with cementitious additives. Thus, an overall characterization of stabilized subgrade layer is important for enhanced short- and long-term pavement performance. In this study, the effect of type and amount of additive on the short-term performance in terms of material properties recommended by the new Mechanistic-Empirical Pavement Design Guide (MEPDG) is examined. A total of four soils commonly encountered as subgrades in Oklahoma are utilized. Results show that the changes in the Mr, ME and UCS values stabilized specimens depend on the soil type and properties of additives. The long-term performance (or durability) of stabilized soil specimens is investigated by conducting freeze-thaw (F-T) cycling, vacuum saturation and tube suction tests on 7-day cured P-, K- and C-soil specimens stabilized with 6% lime, 10% CFA and 10% CKD. This study is motivated by the fact that during the service life of pavement stabilized layers are subjected to F-T cycles and moisture variations. It is found that that UCS value of all the stabilized specimens decreased with increase in the number of F-T cycles. A strong correlation was observed between UCS values retained after vacuum saturation and F-T cycles indicating that vacuum saturation could be used as a time-efficient and inexpensive method for evaluating durability of stabilized soils. In this study, short- and long-term observations from stabilization of sulfate bearing soil with locally available low (CFA), moderate (CKD) and high (lime) calcium-based stabilizers are determined to evaluate and compare the effect of additive type on the phenomenon of sulfate-induced heave. The impact of different factors on the development of the

  19. Investigation and development of a non-destructive system to evaluate critical properties of asphalt pavements during the compaction process.

    DOT National Transportation Integrated Search

    2013-10-01

    The purpose of this report is to present findings from a two-stage investigation to develop a non-destructive system to : evaluate critical properties and characteristics of asphalt pavements during the compaction process. The first stage aligned : c...

  20. Safety performance evaluation of converging chevron pavement markings : final report.

    DOT National Transportation Integrated Search

    2014-12-01

    The objectives of this study were (1) to perform a detailed safety analysis of converging chevron : pavement markings, quantifying the potential safety benefits and developing an understanding of the : incident types addressed by the treatment, and (...

  1. Saw & seal, airport pavement.

    DOT National Transportation Integrated Search

    2009-05-01

    Due to extreme cold temperatures, hot bituminous pavements on Maines airports are subject to transverse : or thermal cracking. This can lead to poorly performing pavement structure causing heaving and : settlement problems. Studies have shown that...

  2. Quieter pavements guidance document

    DOT National Transportation Integrated Search

    2013-02-01

    This report provides guidance and better practice recommendations to the National Park : Service for selecting pavement surfaces to minimize tire-pavement noise. The report : contains an overview of common technologies and methods for quieter pavemen...

  3. Effective flow resistivity of highway pavements.

    PubMed

    Rochat, Judith L; Read, David R

    2013-12-01

    In the case of highway traffic noise, propagating sound is influenced by the ground over which it travels, whether it is the pavement itself or the ground between the highway and nearby communities. Properly accounting for ground type in modeling can increase accuracy in noise impact determinations and noise abatement design. Pavement-specific effective flow resistivity values are being investigated for inclusion in the Federal Highway Administration Traffic Noise Model, which uses these values in the sound propagation algorithms and currently applies a single effective flow resistivity value to all pavement. Pavement-specific effective flow resistivity values were obtained by applying a modified version of the American National Standards Institute S1.18 standard. The data analysis process was tailored to allow for increased sensitivity and extraction of effective flow resistivity values for a broad range of pavements (sound absorptive to reflective). For porous pavements (sound absorptive), it was determined that examination of the measured data can reveal influence from an underlying structure. Use of such techniques can aid in the design of quieter pavements.

  4. Evaluation of asphalt pavement interface conditions for enhanced bond performance.

    DOT National Transportation Integrated Search

    2017-05-01

    This project describes a comprehensive modeling effort aimed at examining the potential impact of interface debonding on near-surface longitudinal cracking in the wheelpath of asphalt pavements. A critical zone defined by high shear stress coupled wi...

  5. Structural evaluation of asphalt pavements with full-depth reclaimed base.

    DOT National Transportation Integrated Search

    2012-12-01

    Currently, MnDOT pavement design recommends granular equivalency, GE = 1.0 for non-stabilized full-depth : reclamation (FDR) material, which is equivalent to class 5 material. For stabilized full-depth reclamation (SFDR), : there was no guideline for...

  6. Evaluation and verification of two systems for mechanistic structural design of asphalt concrete pavements in Nebraska

    NASA Astrophysics Data System (ADS)

    Sneddon, R. V.

    1982-07-01

    The VESY-3-A mechanistic design system for asphalt pavements was field verified for three pavement sections at two test sites in Nebraska. PSI predictions from VESYS were in good agreement with field measurements for a 20 year old 3 layer pavement located near Elmwood, Nebraska. Field measured PSI values for an 8 in. full depth pavement also agreed with VESYS predictions for the study period. Rut depth estimates from the model were small and were in general agreement with field measurements. Cracking estimates were poor and tended to underestimate the time required to develop observable fatigue cracking in the field. Asphalt, base course and subgrade materials were tested in a 4.0 in. diameter modified triaxial cell. Test procedures used dynamic conditioning and rest periods to simulate service conditions.

  7. Concrete pavement joint deterioration.

    DOT National Transportation Integrated Search

    2015-12-01

    Concrete pavements are an important part of our national infrastructure. In recent years the relatively small number of reported joints deteriorating prematurely in concrete pavements around Indiana has increased. Changes over the past 45 years in IN...

  8. Verification of mechanistic-empirical design models for flexible pavements through accelerated pavement testing.

    DOT National Transportation Integrated Search

    2014-08-01

    The Midwest States Accelerated Pavement Testing Pooled Fund Program, financed by the highway : departments of Kansas, Iowa, and Missouri, has supported an accelerated pavement testing (APT) project to : validate several models incorporated in the NCH...

  9. Identification of pavement distress in Kentucky.

    DOT National Transportation Integrated Search

    2006-04-01

    In Kentucky, the roads are comprised primarily of two types of pavement. The first being Portland Cement Concrete (PCC) a rigid pavement, and the other is Asphaltic Concrete (AC), a flexible pavement. There is a noticeable difference in their appeara...

  10. Evaluation of the Long-Term Durability of Joints Cut Using Early Entry Saws on Rigid Pavements

    DOT National Transportation Integrated Search

    2011-01-01

    Early-entry sawing is an attractive operation to expedite the construction of jointed concrete pavements; however, : there are some concerns that the early-entry sawing may compromise the pavements long-term performance. The Illinois : Department ...

  11. Evaluation of long-term pavement performance and noise characteristics of open-graded friction courses : project 2.

    DOT National Transportation Integrated Search

    2012-06-01

    This report describes the second of three experimental installations of open-graded friction course (OGFC) quieter pavements designed to reduce the noise generated at the tire/pavement interface. Experimental sections of OGFC were built using a...

  12. Evaluation of consolidation problems in thicker Portland cement concrete pavements

    DOT National Transportation Integrated Search

    2003-08-01

    Minimizing the amount of entrapped air in concrete is necessary to produce quality concrete with a longer pavement performance life, lower maintenance costs and fewer delays to the roadway users. Good quality concrete with low entrapped air content w...

  13. 76 FR 70809 - Notice of Passenger Facility Charge (PFC) Approvals and Disapprovals

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-15

    .... Pavement condition index airfield inspection. Brief Description of Withdrawn Projects: Safety management... 1U19R and 7R/25L intersection repaving, construction. Perimeter road bridge over Howell Avenue, design. Inline baggage security, construction. Gate D56 improvements, design and construction. Snow removal...

  14. Asphaltic concrete pavement survey.

    DOT National Transportation Integrated Search

    1963-04-01

    The ever increasing problem of wheel path rutting and excessive desification of asphaltic concrete pavement has been the subject of asphalt technology for quite sometime. It is known that the density of the pavement, which is significant for several ...

  15. Evaluation of long-term pavement performance and noise characteristics of open-graded friction courses : project 3.

    DOT National Transportation Integrated Search

    2010-06-01

    This experimental project is being conducted as a part of WSDOTs effort to produce pavements that reduce the noise : generated at the tire/pavement interface. Experimental sections of open-graded friction courses were built using asphalt rubber : ...

  16. Development of Pavement Temperature Contours for India

    NASA Astrophysics Data System (ADS)

    Nivitha, M. R.; Krishnan, J. M.

    2014-06-01

    The stress-strain response of the bituminous pavements is highly sensitive to temperature. To systematically analyze the pavement performance, it is necessary that one understands the variation of pavement temperature spatially and temporally during the life time of a pavement. In this investigation, historic air temperature data for 37 locations across India was collected. Using this database, pavement temperature data was predicted by an appropriate air temperature-pavement temperature model. High and low temperature pavement temperature contours were generated for the first time for India. It was seen that the locations spanning from Srinagar to Madhya Pradesh and Rajasthan to Orissa were extremely critical. The minimum temperature in these locations was 10 C and the maximum temperature was around 68 C. Clearly such information is necessary when making choice of binder grade and bituminous layer thickness.

  17. Accelerated loading evaluation of stabilized BCS layers in pavement performance.

    DOT National Transportation Integrated Search

    2012-03-01

    BCS is short for blended calcium sulfate, a recycled fluorogypsum mixture that has been used in Louisiana as a roadway base for more than a decade. : Without further chemical stabilization, the major concern of using raw BCS as a pavement structural ...

  18. Evaluation of RePlay soy-based sealer for asphalt pavement.

    DOT National Transportation Integrated Search

    2009-07-01

    BioSpan Technologies has developed a product named RePlay. The product is a soy derivative and has been marketed to : drastically reduce the infiltration of air and water into pavement. The company further claims that the oils increase the : flexibil...

  19. Performance evaluation of Arizona's LTPP SPS-2 project : strategic study of structural factors for rigid pavements.

    DOT National Transportation Integrated Search

    2015-10-01

    As part of the Long Term Pavement Performance (LTPP) Program, Arizona Department of Transportation : (ADOT) constructed 21 Specific Pavement Studies 2 (SPS-2) test sections on Interstate 10 near Buckeye, : Arizona, to study a variety of structural se...

  20. Performance of warranted asphalt pavements : smoothness and performance of Indiana warranted asphalt pavements.

    DOT National Transportation Integrated Search

    2016-06-01

    In the early 1990s the Indiana Department of Transportation (INDOT) developed a five-year warranty specification for asphalt pavements : with the first project being built in 1996. In 2004, results indicated that the asphalt pavements built with the ...

  1. Performance evaluation of Arizona's LTPP SPS-5 project : strategic study of rehabilitation of asphalt concrete pavements.

    DOT National Transportation Integrated Search

    2015-06-01

    As part of the Long Term Pavement Performance (LTPP) Program, the Arizona Department of Transportation : (ADOT) constructed 11 Specific Pavement Study5 (SPS5) test sections on Interstate 8 near Casa Grande. The : SPS5 project studied a varie...

  2. The Greenhouse Gas Emission from Portland Cement Concrete Pavement Construction in China

    PubMed Central

    Ma, Feng; Sha, Aimin; Yang, Panpan; Huang, Yue

    2016-01-01

    This study proposes an inventory analysis method to evaluate the greenhouse gas (GHG) emissions from Portland cement concrete pavement construction, based on a case project in the west of China. The concrete pavement construction process was divided into three phases, namely raw material production, concrete manufacture and pavement onsite construction. The GHG emissions of the three phases are analyzed by a life cycle inventory method. The CO2e is used to indicate the GHG emissions. The results show that for 1 km Portland cement concrete pavement construction, the total CO2e is 8215.31 tons. Based on the evaluation results, the CO2e of the raw material production phase is 7617.27 tons, accounting for 92.7% of the total GHG emissions; the CO2e of the concrete manufacture phase is 598,033.10 kg, accounting for 7.2% of the total GHG emissions. Lastly, the CO2e of the pavement onsite construction phase is 8396.59 kg, accounting for only 0.1% of the total GHG emissions. The main greenhouse gas is CO2 in each phase, which accounts for more than 98% of total emissions. N2O and CH4 emissions are relatively insignificant. PMID:27347987

  3. Performance evaluation of Arizona's LTPP SPS-9 Project : strategic study of flexible pavement mix design factors.

    DOT National Transportation Integrated Search

    2016-01-01

    As part of the Long Term Pavement Performance (LTPP) Program, the Arizona Department of Transportation (ADOT) constructed five Specific Pavement Studies 9 (SPS9) test sections on U.S. Route 93 near Kingman. This project, SPS9B, studied the effe...

  4. Evaluation of concrete inlay for continuously reinforced concrete pavement rehabilitation.

    DOT National Transportation Integrated Search

    2010-06-01

    In 1996, WisDOT constructed a concrete inlay test section on I43 in Manitowoc County. The existing pavement was CRCP constructed in 1978 and was badly deteriorated with punchouts. In the area of the 2777foot test section, the existing paveme...

  5. Evaluation of retroreflective durability of raised pavement markers : final report.

    DOT National Transportation Integrated Search

    1975-08-01

    The Louisiana Department of Highways began using reflectorized raised pavement markers on a large scale basis in 1967 when such markers were placed on the Mississippi River Bridge along Route I-10 at Baton Rouge. The Department has engaged in a consi...

  6. Evaluation and Development of Pavement Scores, Performance Models and Needs Estimates for the TXDOT Pavement Management Information System : Final Report

    DOT National Transportation Integrated Search

    2012-10-01

    This project conducted a thorough review of the existing Pavement Management Information System (PMIS) database, : performance models, needs estimates, utility curves, and scores calculations, as well as a review of District practices : concerning th...

  7. Performance of I-57 recycled concrete pavements.

    DOT National Transportation Integrated Search

    2009-01-01

    In 1986-1987 the Illinois Department of Transportation (IDOT) constructed a demonstration project on I-57 near Effingham, Illinois to evaluate the viability : of recycling an existing jointed reinforced concrete pavement for use as its primary aggreg...

  8. Assessing performance of alternative pavement marking materials.

    DOT National Transportation Integrated Search

    2010-01-01

    Pavement markings need to be restriped from time to time to maintain retroreflectivity. : Knowing which material provides the most economically efficient solution is important. : Currently, no agreed upon method by which to evaluate the use of altern...

  9. Application of high performance concrete in the pavement system : structural response of high performance concrete pavement : executive summary.

    DOT National Transportation Integrated Search

    2002-01-01

    Rigid pavements make up a significant percentage of highway systems in the United States and abroad. Concrete pavements provide an economical and durable solution for highway systems, because the pavements last longer and require less maintenance. Re...

  10. Pavement design and performance studies : progress report no. 4 on phase A, performance study of typical Virginia pavements.

    DOT National Transportation Integrated Search

    1970-01-01

    The performance of in-service typical Virginia flexible and rigid pavements in all areas of the state is under evaluation. The objectives are to provide a ready reference for designers and field engineers and to provide background information for des...

  11. Guide to cement-based integrated pavement solutions.

    DOT National Transportation Integrated Search

    2011-08-01

    This guide provides a clear, concise, and cohesive presentation of cement-bound materials options for 10 : specific engineering pavement applications: new concrete pavements, concrete overlays, pervious concrete, : precast pavements, roller-compacted...

  12. Optimization and standardization of pavement management processes.

    DOT National Transportation Integrated Search

    2004-08-01

    This report addresses issues related to optimization and standardization of current pavement management processes in Kentucky. Historical pavement management records were analyzed, which indicates that standardization is necessary in future pavement ...

  13. Time series trends of the safety effects of pavement resurfacing.

    PubMed

    Park, Juneyoung; Abdel-Aty, Mohamed; Wang, Jung-Han

    2017-04-01

    This study evaluated the safety performance of pavement resurfacing projects on urban arterials in Florida using the observational before and after approaches. The safety effects of pavement resurfacing were quantified in the crash modification factors (CMFs) and estimated based on different ranges of heavy vehicle traffic volume and time changes for different severity levels. In order to evaluate the variation of CMFs over time, crash modification functions (CMFunctions) were developed using nonlinear regression and time series models. The results showed that pavement resurfacing projects decrease crash frequency and are found to be more safety effective to reduce severe crashes in general. Moreover, the results of the general relationship between the safety effects and time changes indicated that the CMFs increase over time after the resurfacing treatment. It was also found that pavement resurfacing projects for the urban roadways with higher heavy vehicle volume rate are more safety effective than the roadways with lower heavy vehicle volume rate. Based on the exploration and comparison of the developed CMFucntions, the seasonal autoregressive integrated moving average (SARIMA) and exponential functional form of the nonlinear regression models can be utilized to identify the trend of CMFs over time. Copyright © 2017 Elsevier Ltd. All rights reserved.

  14. Evaluation of NCHRP 747 Pavement Forensic Guide for GDOT’s Adoption

    DOT National Transportation Integrated Search

    2018-04-01

    This report presents the recommendation for whether the Georgia Department of Transportation (GDOT) should adopt the National Cooperative Highway Research Program (NCHRP) Report 747 (Guide for Conducting Forensic Investigations of Highway Pavements) ...

  15. Evaluation of pavement bleeding problem on I-55 in Illinois

    DOT National Transportation Integrated Search

    1991-01-01

    Shortly after construction fat spots began to appear throughout the project on a 3 inch hot mix asphalt (HMA) overlay of an existing PCC pavement. The fat spots appeared to occur at end of truck loads. After time the fat spots developed into potholes...

  16. Pavement temperature and burns: streets of fire.

    PubMed

    Harrington, W Z; Strohschein, B L; Reedy, D; Harrington, J E; Schiller, W R

    1995-11-01

    To measure pavement temperatures over a 24-hour period to determine when patients are at risk for burns and to report cases of pavement burns with predisposing factors. Descriptive study of pavement temperatures and retrospective case series of 23 patients with pavement burns admitted to the Maricopa Medical Center during the years 1986 to 1992. Twenty-three patients with pavement burns serious enough for them to be admitted to the burn center. We measured the temperatures of asphalt, cement, and other outdoor materials hourly for one 24-hour period using a thermocouple thermometer. Asphalt pavement was hot enough to cause burns from 9 AM to 7 PM during the summer months. It was hot enough to cause a second-degree burn within 35 seconds from 10 AM to 5 PM. The group of burned patients could be divided into three categories: incapacitated, restrained, and sensory deficient. All burns involved less than 13% of the total body surface area. During summer days in the desert, pavement is often hot enough to cause burns and does so with regularity in the southwestern United States. No one should be allowed to remain in contact with hot pavement, even transiently.

  17. Asphalt materials characterization in support of implementation of the proposed mechanistic-empirical pavement design guide.

    DOT National Transportation Integrated Search

    2007-01-01

    The proposed Mechanistic-Empirical Pavement Design Guide (MEPDG) procedure is an improved methodology for pavement design and evaluation of paving materials. Since this new procedure depends heavily on the characterization of the fundamental engineer...

  18. Layer moduli of Nebraska pavements for the new Mechanistic-Empirical Pavement Design Guide (MEPDG).

    DOT National Transportation Integrated Search

    2010-12-01

    As a step-wise implementation effort of the Mechanistic-Empirical Pavement Design Guide (MEPDG) for the design : and analysis of Nebraska flexible pavement systems, this research developed a database of layer moduli dynamic : modulus, creep compl...

  19. Desert Pavement Studies

    DTIC Science & Technology

    2003-11-30

    Desert Pavement: an Environmental Canary? P. K. Haff Journal of Geology, 109, 661-668, 2001. Neogeomorphology , Prediction , and the Anthropic ... Landscape P. K. Haff AGU special publication Prediction in Geomorphology, in press 2003. Neogeomorphology P. K. Haff EOS, 83, p310, p317, 2002... landscape (a fact that underlies their stability). The problem is to understand what pavements are likely to do when disturbed in certain ways, for

  20. The effect of cracking on the deflection basin of flexible pavements

    NASA Astrophysics Data System (ADS)

    Omar, Hadi Mohamed

    Because of the rapid development of hardware and software during the past decade, it is now possible to use an analytical-empirical (or mechanistic) method of structural pavement evaluation on a routine basis. One reason for using this approach is the increased need for pavement maintenance and rehabilitation. To make the right choice from many potentially feasible maintenance and rehabilitation measures, the engineer must base his decision on a rational evaluation of the mechanical properties of the materials in the existing pavement structure. One of the parameters in terms of pavement response are the deflections; these are of interest to this particular study. The Falling Weight Deflectometer (FWD) has been developed specifically for the purpose of obtaining deflection measurements in order to determine the in-situ elastic moduli. The profile of the deflection at the surface of the pavement is known as the deflection basin, because it resembles a bowl-shaped depression. The magnitude of the deflections and the basin shape are functions of the number of layers making up the pavement cross section, their thicknesses, and their moduli values. A variety of multi-layered linear elastic pavement models are available for use at this present time. A general-purpose finite-element program called ANSYS developed by Swanson Analysis System is very powerful and is capable of solving a layered system such as the pavement. A finite element model was developed to study the effect of the crack on the predicted deflection bowls. A general-purpose finite-element program was used in this study due to its ability to solve this problem and because of the availability of the program. A hypothetical crack problem was assumed and modeled in different ways. The crack depth, crack width, and distance of the crack from the loading point were among the many parameters that were investigated. Considering the shape of the deflection basin, it is very important to study the effect of the

  1. Nondestructive pavement evaluation using ILLI-PAVE based artificial neural network models.

    DOT National Transportation Integrated Search

    2008-09-01

    The overall objective in this research project is to develop advanced pavement structural analysis models for more accurate solutions with fast computation schemes. Soft computing and modeling approaches, specifically the Artificial Neural Network (A...

  2. The effect of loading time on flexible pavement dynamic response: a finite element analysis

    NASA Astrophysics Data System (ADS)

    Yin, Hao; Solaimanian, Mansour; Kumar, Tanmay; Stoffels, Shelley

    2007-12-01

    Dynamic response of asphalt concrete (AC) pavements under moving load is a key component for accurate prediction of flexible pavement performance. The time and temperature dependency of AC materials calls for utilizing advanced material characterization and mechanistic theories, such as viscoelasticity and stress/strain analysis. In layered elastic analysis, as implemented in the new Mechanistic-Empirical Pavement Design Guide (MEPDG), the time dependency is accounted for by calculating the loading times at different AC layer depths. In this study, the time effect on pavement response was evaluated by means of the concept of “pseudo temperature.” With the pavement temperature measured from instrumented thermocouples, the time and temperature dependency of AC materials was integrated into one single factor, termed “effective temperature.” Via this effective temperature, pavement responses under a transient load were predicted through finite element analysis. In the finite element model, viscoelastic behavior of AC materials was characterized through relaxation moduli, while the layers with unbound granular material were assumed to be in an elastic mode. The analysis was conducted for two different AC mixtures in a simplified flexible pavement structure at two different seasons. Finite element analysis results reveal that the loading time has a more pronounced impact on pavement response in the summer for both asphalt types. The results indicate that for reasonable prediction of dynamic response in flexible pavements, the effect of the depth-dependent loading time on pavement temperature should be considered.

  3. Evaluation of sandwich layer system of flexible pavements in Virginia.

    DOT National Transportation Integrated Search

    1972-01-01

    The use of a weak sandwich layer in a four-layer system is common in the construction of flexible pavements, but the use of a sandwich layer in a three-layer system is in the experimental stage in Virginia. Theoretical and field studies have been car...

  4. Evaluation of asphalt pavement interface conditions for enhanced bond performance : [summary].

    DOT National Transportation Integrated Search

    2017-05-01

    In this project, University of Florida researchers conducted a comprehensive program of modeling to understand interface debonding and near-surface longitudinal cracking in the wheel path of asphalt pavements. : To understand the interaction of debon...

  5. Evaluation of performance of asphalt pavements constructed using intelligent compaction techniques.

    DOT National Transportation Integrated Search

    2014-10-01

    The long-term performance of asphalt pavements depends on the quality of the subgrade and : asphalt layers. Intelligent compaction methods continuously monitor the modulus/stiffness of : subgrade and asphalt layers during compaction process and have ...

  6. Recycled asphalt pavement - fly ash geopolymer as a sustainable stabilized pavement material

    NASA Astrophysics Data System (ADS)

    Horpibulsuk, S.; Hoy, M.; Witchayaphong, P.; Rachan, R.; Arulrajah, A.

    2017-11-01

    Strength, durability, microstructure and leachate characteristics of Recycled Asphalt Pavement and Fly Ash (RAP-FA) geopolymers and RAP-FA blends as a sustainable pavement material are evaluated in this paper. The strength development of the stabilized materials with and without effect wetting-drying (w-d) cycles was determined by Unconfined Compression Strength (UCS) test. The mineralogical and microstructural changes of the stabilized material were analyzed by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The leachability of the heavy metals were measured by Toxicity Characteristic Leaching Procedure (TCLP) and compared with international standard. The results show that both RAP-FA blend and RAP-FA geopolymer increase with increasing the number of w-d cycles (C), reaching its peak at 6 w-d cycles. The XRD and SEM analyses indicate that the strength development of RAP-FA blend occurs due to stimulation of the chemical reaction between the high amount to Calcium in RAP and the high amount of Silica and Alumina in FA leaching to production of Calcium Aluminium (Silicate) Hydrate, while the geopolymerization reaction is observed in RAP-FA geopolymer. For C> 6, the significant macro- and micro-cracks developed during w-d cycles cause strength reduction for both RAP-FA blend and geopolymer. The TCLP results demonstrate that there is no environmental risk for these stabilized materials. Furthermore, FA-geopolymer can reduce the leachability of heavy metal in RAP-FA blend. The outcome from this research confirms the viability of using RAP-FA blend and RAP-FA geopolymer as alternative sustainable pavement materials.

  7. A guide for local agency pavement managers

    DOT National Transportation Integrated Search

    1994-12-01

    The purpose of this guide is to provide Washington's local agencies with a practical document that will assist pavement managers in understanding the pavement management process and the steps necessary to implement their own pavement management syste...

  8. Pavement profile viewer and analyzer : product brief.

    DOT National Transportation Integrated Search

    2003-06-01

    Pavement Profile Viewer and Analyzer, or ProVAL, is a software package that imports, displays, and analyzes the characteristics of pavement profiles from many different sources. ProVAL can analyze pavement profiles using several methods, including In...

  9. Strength and deformation characteristics of pavements

    NASA Astrophysics Data System (ADS)

    Shook, J. F.; Kallas, B. F.; McCullough, B. F.; Taute, A.; Rada, G.; Witczak, M. W.; Heisey, J. S.; Stokoe, K. H.; Meyer, A. H.; Huffman, M. S.

    The Colorado experimental base project was a full-scale field experment constructed with various thicknesses of two full depth hot mix sand asphalt beans, one full depth asphalt concrete base, and one thickness of a standard design with untreated base and subbase layers. Relative thicknesses of one asphalt concrete base, two hot mix sand asphalt bases, and one standard design with untreated base and subbase required to give an equal level of pavement performance were determined. Certain measured properties of the pavement and the pavement components were related to observed levels of performance by using both empirical and theoretical models for pavement behavior.

  10. Expedient Spall Repair Methods and Equipment for Airfield Pavements Preprint

    DTIC Science & Technology

    2009-08-01

    placement (3). RESEACH OBJECTIVES AND SCOPE The objective of this research was to develop one or more methods that will allow field personnel to...cores were used to perform in-situ tensile pull-off tests to evaluate the bond between the repair material and the substrate. Also, a series of 4...inch diameters cores were cut, and direct shear tests were performed on the repair material/substrate interface. Finally, all spalls were trafficked for

  11. Advanced Pavement Design: Finite Element Modeling for Rigid Pavement Joints, Report II: Model Development

    DOT National Transportation Integrated Search

    1998-03-01

    The contribution of a cement-stabilized base course to the strength of the rigid pavement structure is poorly understood. The objective of this research was to obtain data on the response of the rigid pavement slab-joint-foundation system by conducti...

  12. Using traffic speed deflectometer to measure deflections and evaluate bearing capacity of asphalt road pavements at network level

    NASA Astrophysics Data System (ADS)

    Březina, Ilja; Stryk, Josef; Grošek, Jiří

    2017-09-01

    The paper deals with diagnostics of bearing capacity of asphalt pavements by a Traffic Speed Deflectometer (TSD device), which allows to measure pavement deflections continually at the traffic speed on the basis of dynamic loading induced by moving wheel of a reference axle at the speed of up to 80 km/h. The paper aims to inform of a new method to measure road pavement deflections, describes the principles of measuring pavement deflections by TSD device, and presents results of comparative measurements between FWD (Falling Weight Deflectometer) and TSD devices organized by CDV in Italy and Slovakia. Particular attention was paid to the difference between deflections measured by FWD and TSD devices.

  13. Impact of variations in material properties on asphalt pavement life-evaluation of Warren-Scappoose project : interim report.

    DOT National Transportation Integrated Search

    1981-12-01

    Construction and short-term pavement performance problems were noted in the Pacific Northwest and throughout the United States during the past five years. Several reasons have been suggested to explain this sudden change in pavement performance, such...

  14. An evaluation of the effects of tread depth, pavement texture, and water film thickness on skid number-speed gradients : supplement.

    DOT National Transportation Integrated Search

    1975-03-01

    The raw data and the initial curves for the study entitled, "An Evaluation of the Effects of Tread Depth, Pavement Texture, and Water Film Thickness on Skid Number-Speed Gradients" are so voluminous that they are included in the Supplement rather tha...

  15. Finite element simulation of structural performance on flexible pavements with stabilized base/treated subbase materials under accelerated loading : tech summary.

    DOT National Transportation Integrated Search

    2011-12-01

    Accelerated pavement testing (APT) has been increasingly used by state highway agencies in recent years for evaluating pavement : design and performance through applying a simulative heavy vehicular load to the pavement section under controlled fi el...

  16. Pavement smoothness indices : research brief.

    DOT National Transportation Integrated Search

    1998-08-01

    Many in the asphalt industry believe that initial pavement smoothness directly relates to : pavement life. Public perception of smoothness is also important. Oregon is interested in : determining the appropriate method of measurement to quantify smoo...

  17. Training development for pavement preservation.

    DOT National Transportation Integrated Search

    2013-05-01

    This research project strives to help the Iowa Department of Transportation (DOT) fully achieve the full benefits of pavement : preservation through training on proper selection, design, and application of pavement preservation treatments. In some ca...

  18. Flexible pavement rehabilitation using pulverization.

    DOT National Transportation Integrated Search

    2008-06-01

    Pulverization is a roadway rehabilitation strategy that involves in-place recycling of the entire existing flexible pavement layer and some of the existing granular base layer (Figure 1). Pavement pulverization provides an alternative to conventional...

  19. Alternative pavements for snowmobile crossings.

    DOT National Transportation Integrated Search

    2009-09-01

    Excessive highway pavement wear from snowmobile traffic is a maintenance problem for the New Hampshire Department of : Transportation. The snowmobiles and trail grooming equipment scar and erode the pavement surfaces, eventually creating wide ruts ac...

  20. Accelerated loading evaluation of subbase layers in pavement performance : tech summary.

    DOT National Transportation Integrated Search

    2009-04-01

    The mighty Mississippi River formed and sculpted most of south Louisiana, creating large areas of alluvial : deposits consisting of soft, wet, and unconsolidated soil layers. Many Louisiana pavements were built in : these areas of naturally low shear...

  1. Laboratory evaluation of recycled concrete as aggregate in new concrete pavements.

    DOT National Transportation Integrated Search

    2014-09-01

    The Washington State Department of Transportation (WSDOT) has initiated a research project to investigate the use of recycled concrete as : aggregates (RCA) in Portland (hydraulic) cement concrete pavements (PCCP). The planned source for the RCA in t...

  2. Development of reliable pavement models.

    DOT National Transportation Integrated Search

    2011-05-01

    The current report proposes a framework for estimating the reliability of a given pavement structure as analyzed by : the Mechanistic-Empirical Pavement Design Guide (MEPDG). The methodology proposes using a previously fit : response surface, in plac...

  3. Verification of mechanistic-empirical design models for flexible pavements through accelerated pavement testing : technical summary.

    DOT National Transportation Integrated Search

    2014-08-01

    Midwest States Accelerated Pavement Testing Pooled-Fund Program, financed by the : highway departments of Kansas, Iowa, and Missouri, has supported an accelerated : pavement testing (APT) project to validate several models incorporated in the NCHRP :...

  4. Microorganism Removal in Permeable Pavement Parking Lots ...

    EPA Pesticide Factsheets

    Three types of permeable pavements (pervious concrete, permeable interlocking concrete pavers, and porous asphalt) were monitored at the Edison Environmental Center in Edison, New Jersey for indicator organisms such as fecal coliform, enterococci, and E. coli. Results showed that porous asphalt had much lower concentration in monitored infiltrate compared to pervious concrete and permeable interlocking concrete pavers. Concentrations of monitored organisms in infiltrate from porous asphalt were consistently below the bathing water quality standard. Fecal coliform and enterococci exceeded bathing water quality standards more than 72% and 34% of the time for permeable interlocking concrete pavers and pervious concrete, respectively. Purpose is to evaluate the performance of permeable pavement in removing indicator organisms from infiltrating stormwater runoff.

  5. Investigation of pavement permeability : Old Bridge Road.

    DOT National Transportation Integrated Search

    2001-01-01

    Several instances of wet pavement and pavement icing on Old Bridge Road were reported to VDOT's Lake Ridge Area Headquarters when no new precipitation had fallen. The pavement structure appears to hold water. This water seeps to the surface at a numb...

  6. Asphalt in Pavement Maintenance.

    ERIC Educational Resources Information Center

    Asphalt Inst., College Park, MD.

    Maintenance methods that can be used equally well in all regions of the country have been developed for the use of asphalt in pavement maintenance. Specific information covering methods, equipment and terminology that applies to the use of asphalt in the maintenance of all types of pavement structures, including shoulders, is provided. In many…

  7. Status report on pavement management.

    DOT National Transportation Integrated Search

    1984-01-01

    This report traces the developments in pavement management in the Virginia Department of Highways and Transportation from the initial efforts in the mid-1970s through early 1984. Included are status reports on pavement management for the interstate, ...

  8. Development of nondestructive methods for measurement of slab thickness and modulus of rupture in concrete pavements.

    DOT National Transportation Integrated Search

    2005-01-01

    This report describes work to develop non-destructive testing methods for concrete pavements. Two methods, for pavement thickness and in-place strength estimation, respectively, were developed and evaluated. The thickness estimation method is based o...

  9. Proactive pavement asset management with climate change aspects

    NASA Astrophysics Data System (ADS)

    Zofka, Adam

    2018-05-01

    Pavement Asset Management System is a systematic and objective tool to manage pavement network based on the rational, engineering and economic principles. Once implemented and mature Pavement Asset Management System serves the entire range of users starting with the maintenance engineers and ending with the decision-makers. Such a system is necessary to coordinate agency management strategy including proactive maintenance. Basic inputs in the majority of existing Pavement Asset Management System approaches comprise the actual pavement inventory with associated construction history and condition, traffic information as well as various economical parameters. Some Pavement Management System approaches include also weather aspects which is of particular importance considering ongoing climate changes. This paper presents challenges in implementing the Pavement Asset Management System for those National Road Administrations that manage their pavement assets using more traditional strategies, e.g. worse-first approach. Special considerations are given to weather-related inputs and associated analysis to demonstrate the effects of climate change in a short- and long-term range. Based on the presented examples this paper concludes that National Road Administrations should account for the weather-related factors in their Pavement Management Systems as this has a significant impact on the system outcomes from the safety and economical perspective.

  10. Statistical classification of road pavements using near field vehicle rolling noise measurements.

    PubMed

    Paulo, Joel Preto; Coelho, J L Bento; Figueiredo, Mário A T

    2010-10-01

    Low noise surfaces have been increasingly considered as a viable and cost-effective alternative to acoustical barriers. However, road planners and administrators frequently lack information on the correlation between the type of road surface and the resulting noise emission profile. To address this problem, a method to identify and classify different types of road pavements was developed, whereby near field road noise is analyzed using statistical learning methods. The vehicle rolling sound signal near the tires and close to the road surface was acquired by two microphones in a special arrangement which implements the Close-Proximity method. A set of features, characterizing the properties of the road pavement, was extracted from the corresponding sound profiles. A feature selection method was used to automatically select those that are most relevant in predicting the type of pavement, while reducing the computational cost. A set of different types of road pavement segments were tested and the performance of the classifier was evaluated. Results of pavement classification performed during a road journey are presented on a map, together with geographical data. This procedure leads to a considerable improvement in the quality of road pavement noise data, thereby increasing the accuracy of road traffic noise prediction models.

  11. Pavement marking restriping strategy for ODOT district 11.

    DOT National Transportation Integrated Search

    2016-01-01

    This study was initiated by ODOT to evaluate the performance of four : pavement marking materials (fast dry traffic paint, polyester, extruded : thermoplastic and epoxy) in order to determine which materials are most : suitable for the environmental ...

  12. Quiet pavement systems in Europe

    DOT National Transportation Integrated Search

    2005-05-01

    Noise pollution is a growing concern in the United States. A major contributor of highway noise is at the tire-pavement interface, which means that quieter pavements could lead to reductions in traffic-generated noise. The Federal Highway Administrat...

  13. Evaluation of the strength of cement-treated aggregate for pavement bases.

    DOT National Transportation Integrated Search

    2006-01-01

    Cement-treated aggregate (CTA) is commonly used to provide a stable base for pavements that are placed over weak soil subgrades. Because CTA reduces the thickness of the aggregate required to provide a durable base by approximately one-half, using it...

  14. Guidelines for rehabilitating flexible pavements.

    DOT National Transportation Integrated Search

    1986-01-01

    The guidelines presented in this report are intended as an aid to the engineer in selecting the most appropriate type of pavement rehabilitation from those that are available. The basic types of distress in pavement surfaces and their causes are desc...

  15. Estimation of Asphalt Pavement Life

    DOT National Transportation Integrated Search

    2002-01-01

    The milling of asphalt concrete (AC) pavement surface refers to the mechanical removal of a part of the pavement surface. The Kansas Department of Transportation (KDOT) and the Kansas Turnpike Authority (KTA) routinely mill the surfaces of some AC pa...

  16. Assessment of stripped asphalt pavement.

    DOT National Transportation Integrated Search

    1989-01-01

    Many miles of stripped pavement need to be restored to a serviceable condition, but there is no accepted procedure to determine whether the pavement should remain in place or be removed during the rehabilitation process. This report describes the att...

  17. The effect of contaminant on skid resistance of pavement surface

    NASA Astrophysics Data System (ADS)

    Lubis, A. S.; Muis, Z. A.; Gultom, E. M.

    2018-03-01

    Skid resistance of the pavement surface is the force generated by the movement of the wheels of the vehicle on the surface of the pavement. Contaminants are materials that cover the surface of the pavement affecting the skid resistance of the pavement surface. The contaminant acts as a coating interface or direct contact of the pavement surface with the wheels of the vehicle which can cause adverse effects, such as the decreasing value of skid resistance of the pavement surface. This study aims to analyze the effect of some types of contaminants on skid resistance of pavement surfaces. The contaminants that used in this study were water, sand, salt, and lubricating oil. The study was conducted by direct testing on two types of pavement: flexible pavement and rigid pavement. The measurements of the skid resistance were made using the British Pendulum Tester with British Pendulum Number for two conditions: before and after the pavement surface was covered with contaminants. The results showed that there was a contaminant effect on skid resistance of pavement surface. Skid resistance of pavement surfaces decreased after the contaminants were covered in water, sand, salt, and lubricant by 20.1%, 22.8%, 37.1% and 50.5% respectively.

  18. How to reduce tire-pavement noise : better practices for constructing and texturing concrete pavement surfaces.

    DOT National Transportation Integrated Search

    2012-08-01

    Concrete pavements can be designed and constructed to be as quiet as any other conventional pavement type in use today. This report provides an overview of how this can be doneand done consistently. In order to construct a quieter concrete pavemen...

  19. Minnesota Local Agency Pavement Marking : Mining Existing Data

    DOT National Transportation Integrated Search

    2017-11-01

    Pavement marking is important for safety. Maximizing pavement marking performance in terms of increased retroreflectivity, within limited budget constraints, allows agencies to make better decisions toward providing more effective pavement marking pe...

  20. Advanced road scene image segmentation and pavement evaluation using neural networks.

    DOT National Transportation Integrated Search

    2010-01-01

    The current project, funded by MIOH-UTC for the period 9/1/2009-8/31/2010, continues our : efforts in designing an image processing based pavement inspection system for the : assessment of highway surface conditions. One of the most important tasks i...

  1. Durability of saw-cut joints in plain cement concrete pavements.

    DOT National Transportation Integrated Search

    2011-01-01

    The objective of this project was to evaluate factors influencing the durability of the joints in portland cement concrete : pavement in the state of Indiana. Specifically this work evaluated the absorption of water, the absorption of deicing solutio...

  2. The effects of varying the tire cap ply, sidewall filler height and pavement surface texture on tire/pavement noise generation

    DOT National Transportation Integrated Search

    2003-02-01

    In order to better understand the effect of tire carcass construction and pavement texture on tire/pavement noise generation, a measurement program was conducted on a group of four automobile tires on three pavement textures. The tires included all c...

  3. Evaluating pavement markings on portland cement concrete (PCC) and various asphalt surfaces : results of year 1 data collection.

    DOT National Transportation Integrated Search

    2013-12-01

    The Illinois Department of Transportation (IDOT) uses a variety of different pavement marking : systems and has experienced a wide range of pavement marking performance. In an effort to : maximize marking performance and to optimize marking selection...

  4. Modeling the Hydrologic Processes of a Permeable Pavement ...

    EPA Pesticide Factsheets

    A permeable pavement system can capture stormwater to reduce runoff volume and flow rate, improve onsite groundwater recharge, and enhance pollutant controls within the site. A new unit process model for evaluating the hydrologic performance of a permeable pavement system has been developed in this study. The developed model can continuously simulate infiltration through the permeable pavement surface, exfiltration from the storage to the surrounding in situ soils, and clogging impacts on infiltration/exfiltration capacity at the pavement surface and the bottom of the subsurface storage unit. The exfiltration modeling component simulates vertical and horizontal exfiltration independently based on Darcy’s formula with the Green-Ampt approximation. The developed model can be arranged with physically-based modeling parameters, such as hydraulic conductivity, Manning’s friction flow parameters, saturated and field capacity volumetric water contents, porosity, density, etc. The developed model was calibrated using high-frequency observed data. The modeled water depths are well matched with the observed values (R2 = 0.90). The modeling results show that horizontal exfiltration through the side walls of the subsurface storage unit is a prevailing factor in determining the hydrologic performance of the system, especially where the storage unit is developed in a long, narrow shape; or with a high risk of bottom compaction and clogging. This paper presents unit

  5. Application of empirical and mechanistic-empirical pavement design procedures to Mn/ROAD concrete pavement test sections

    DOT National Transportation Integrated Search

    1997-05-01

    Current pavement design procedures are based principally on empirical approaches. The current trend toward developing more mechanistic-empirical type pavement design methods led Minnesota to develop the Minnesota Road Research Project (Mn/ROAD), a lo...

  6. Pavement Distress Evaluation Using 3D Depth Information from Stereo Vision

    DOT National Transportation Integrated Search

    2012-07-01

    The focus of the current project funded by MIOH-UTC for the period 9/1/2010-8/31/2011 is to : enhance our earlier effort in providing a more robust image processing based pavement distress : detection and classification system. During the last few de...

  7. Best practices for architectural pavement treatments : final report.

    DOT National Transportation Integrated Search

    2010-03-01

    Architectural Pavement Treatments are special treatments applied to pavements to enhance the aesthetic : character of the pavement and the surrounding environs in which they are applied. They achieve this objective : by imparting special colors and/o...

  8. Geotextiles in Flexible Pavement Construction

    ERIC Educational Resources Information Center

    Alungbe, Gabriel D.

    2004-01-01

    People everywhere in the developed world regularly drive on paved roads. Learning about the construction techniques and materials used in paving benefits technology and construction students. This article discusses the use of geosynthetic textiles in pavement construction. It presents background on pavements and describes geotextiles and drainage…

  9. Evaluation of the fatigue and toughness of fiber reinforced concrete for use as a new highway pavement design.

    DOT National Transportation Integrated Search

    2016-04-01

    Concrete pavement design is currently centered on steel reinforcement, whether that reinforcement be in the : form of dowel bars, as is the case in jointed plain concrete pavement (JPCP), or in the form of continuous rebar : reinforcement, continuous...

  10. Analysis of Cracking in Jointed Plain Concrete Pavements

    DOT National Transportation Integrated Search

    2017-03-01

    This paper investigates the trends of longitudinal and transverse cracking in jointed concrete pavements based on Long-Term Pavement Performance (LTPP) Program Strategic Study of Structural Factors for Rigid Pavements (SPS-2) data. The impacts of sla...

  11. A design guide for subdivision pavements in Virginia.

    DOT National Transportation Integrated Search

    1973-01-01

    The design method for secondary roads and that for subdivision roads are based on AASHO Road Test Results and Virginia's design experience. For flexible pavements, the methods are divided into two parts: (1) the evaluation of the soil support value o...

  12. High-volume recycled materials for sustainable pavement construction.

    DOT National Transportation Integrated Search

    2017-05-01

    The main objective of this research is to evaluate the feasibility of using high-volume recycled materials for concrete production in rigid pavement. The goal was to replace 50% of the solids with recycled materials and industrial by-products. The pe...

  13. Effectiveness of various public private partnership pavement rehabilitation treatments: A big data informatics survival analysis of pavement service life : final report.

    DOT National Transportation Integrated Search

    2017-09-29

    Past research efforts have used a wide variety of methodological approaches to analyze pavement performance indicators, pavement rehabilitation treatments, and pavement service life. Using big data informatics methods, the intent of this study is to ...

  14. Georgia concrete pavement performance and longevity.

    DOT National Transportation Integrated Search

    2012-02-01

    The Georgia Department of Transportation (GDOT) has effectively utilized its pavement management system (PMS) to make informed, data-driven pavement maintenance decisions, including project selection, project prioritization, and funding allocation. C...

  15. Greenhouse gas emissions of alternative pavement designs: framework development and illustrative application.

    PubMed

    Liu, Xiaoyu; Cui, Qingbin; Schwartz, Charles

    2014-01-01

    Pavement rehabilitation is carbon intensive and the choice of pavement type is a critical factor in controlling greenhouse gas (GHG) emissions. The existing body of knowledge is not able to support decision-making on pavement choice due to a lack of consensus on the system boundaries, the functional units and the estimation periods. Excessive data requirements further inhibit the generalization of the existing methodologies for design evaluation at the early planning stage. This study proposes a practical life-cycle GHG estimation approach, which is arguably effective to benchmark pavement emissions given project bid tabulation. A set of case studies conducted for this study suggest that recycled asphalt pavement (e.g., foam stabilized base (FSB), and warm mix asphalt (WMA)) would prevent up to 50% of GHGs from the initial construction phase. However, from a life-cycle perspective, pavement emissions are dictated largely by the traffic characteristics and the analysis period for the use phase. The benefits from using recycled materials (e.g., FSB) are likely to diminish if the recycled products do not perform as well as those properly proportioned with less recycled materials, or if the recycled materials are locally unavailable. When the AADT reaches 10,000, use phase releases more than 97% of the life cycle emissions and the emissions difference among alternative designs will be within 1%. Copyright © 2013 Elsevier Ltd. All rights reserved.

  16. Pavement thickness design for local roads in Iowa.

    DOT National Transportation Integrated Search

    2010-02-01

    Three pavement design software packages were compared with regards to how they were different in determining design input parameters and their influences on the pavement thickness. StreetPave designs the concrete pavement thickness based on the PCA m...

  17. Evaluating Cool Impervious Surfaces: Application to an Energy-Efficient Residential Roof and to City Pavements

    NASA Astrophysics Data System (ADS)

    Rosado, Pablo Javier

    heating savings of 4% and electric heating savings of 3%. The slightly positive fractional annual heating energy savings likely resulted from the tile roof's high thermal capacitance, which increased the overnight temperature of the attic air. Thus cool tile roofs should be perceived as a technology that provides energy and environmental benefits during the cooling season as well as the heating season. The second topic investigates the direct and indirect effects of cool pavements on the energy use of California's building stock. First, a simple urban canyon model was developed to calculate the canyon albedo after the user provides the solar position, canyon orientation, and dimensions of the canyon walls, road, and setbacks. Next, a method is presented to correct the values of temperature changes obtained from previous urban climate models to values that would be obtained from canyon geometries that distinguish between road and setbacks (e.g. sidewalk, front yard). The new canyon model is used to scale the temperature changes obtained from a recent urban climate model that simulated the climatological impact of cool pavements on various California cities. The adjusted temperature changes are then combined with building energy simulations to investigate the effect of cool pavements on the cooling, heating, and lighting energy uses of buildings as well as the environmental impact related to these energy uses. Net (direct + indirect) conditioning (cooling + heating) energy savings and environmental savings from cool pavements were smaller in residential buildings than in commercial buildings. Additionally, residential buildings strongly dominate the building stock in all of the evaluated cities. Therefore, even though most cities yielded conditioning energy and environmental savings, they were small due to the minuscule savings from the residential buildings. When increasing the albedo by 0.20 of all public pavements in different California cities, Los Angeles was the city

  18. Pavement sound absorption measurements in the U.S.

    DOT National Transportation Integrated Search

    2012-08-19

    In the U.S., the topic of pavement sound absorption in regard to tire-pavement noise has shown increased interest and research over the last several years. Four types of pavement sound absorption measurements with various applications are discussed: ...

  19. Sealants and cold regions pavement seals : a review

    DOT National Transportation Integrated Search

    1995-05-01

    A pavement joint seal prevents the passage of liquids into the pavement base and the intrusion of solids into the joint. The primary mechanical requirements of a pavement seal are that it respond elastically or viscoelastically to any movement of the...

  20. Quantifying Evaporation in a Permeable Pavement System ...

    EPA Pesticide Factsheets

    Studies quantifying evaporation from permeable pavement systems are limited to a few laboratory studies and one field application. This research quantifies evaporation for a larger-scale field application by measuring the water balance from lined permeable pavement sections. The U.S. Environmental Protection Agency (USEPA) constructed a 0.4-ha parking lot in Edison, NJ, that incorporated three different permeable pavement types in the parking lanes – permeable interlocking concrete pavers (PICP), pervious concrete (PC), and porous asphalt (PA). An impermeable liner installed 0.4 m below the driving surface in four 11.6-m by 4.74-m sections per each pavement type captures all infiltrating water and routes it to collection tanks that can contain events up to 38 mm. Each section has a design impervious area to permeable pavement area ratio of 0.66:1. Pressure transducers installed in the underdrain collection tanks measured water level for 24 months. Level was converted to volume using depth-to-volume ratios for individual collection tanks. Using a water balance approach, the measured infiltrate volume was compared to rainfall volume on an event-basis to determine the rainfall retained in the pavement strata and underlying aggregate. Evaporation since the previous event created additional storage in the pavement and aggregate layers. Events were divided into three groups based on antecedent dry period (ADP) and three, four-month categories of potential e

  1. Improving Rutting Resistance of Pavement Structures Using Geosynthetics: An Overview

    PubMed Central

    Karim, Mohamed Rehan; Khodaii, Ali; Almasi, Mohammad Hadi

    2014-01-01

    A pavement structure consists of several layers for the primary purpose of transmitting and distributing traffic loads to the subgrade. Rutting is one form of pavement distresses that may influence the performance of road pavements. Geosynthetics is one type of synthetic materials utilized for improving the performance of pavements against rutting. Various studies have been conducted on using different geosynthetic materials in pavement structures by different researchers. One of the practices is a reinforcing material in asphalt pavements. This paper intends to present and discuss the discoveries from some of the studies on utilizing geosynthetics in flexible pavements as reinforcement against permanent deformation (rutting). PMID:24526919

  2. Improving rutting resistance of pavement structures using geosynthetics: an overview.

    PubMed

    Mirzapour Mounes, Sina; Karim, Mohamed Rehan; Khodaii, Ali; Almasi, Mohammad Hadi

    2014-01-01

    A pavement structure consists of several layers for the primary purpose of transmitting and distributing traffic loads to the subgrade. Rutting is one form of pavement distresses that may influence the performance of road pavements. Geosynthetics is one type of synthetic materials utilized for improving the performance of pavements against rutting. Various studies have been conducted on using different geosynthetic materials in pavement structures by different researchers. One of the practices is a reinforcing material in asphalt pavements. This paper intends to present and discuss the discoveries from some of the studies on utilizing geosynthetics in flexible pavements as reinforcement against permanent deformation (rutting).

  3. Internally cured concrete for pavement and bridge deck applications.

    DOT National Transportation Integrated Search

    2015-07-01

    A laboratory and field testing program was conducted to evaluate the performance and usability of internally : cured concrete (ICC) using lightweight aggregates for bridge decks and concrete pavement slabs under Florida : conditions. The laboratory t...

  4. Vehicle tire-pavement interfacial surface pressure measurements and assessments.

    DOT National Transportation Integrated Search

    2009-05-01

    This report examines a method of using Piezoelectric Pressure-Sensitive Ink (Tekscan) Pressure Measurement System to evaluate vehicle tire pressures that are exerted on the surface of pavements. Upgrades to the Tekscan system facilitated refinements ...

  5. Future design of perpetual pavements for New Mexico.

    DOT National Transportation Integrated Search

    2009-12-29

    This study provides guidance for future designs of perpetual pavements in New Mexico. The perpetual pavement in this study refers to only hot mix asphalt (HMA) pavement sections designed for a useful life of 50 years or more without having major dist...

  6. Pavement Remaining Service Interval [Tech Brief

    DOT National Transportation Integrated Search

    2013-05-01

    This document is a technical summary of the Federal Highway Administration reports, "Reformulated Pavement Remaining Service Life Framework" (FHWA-HRT-13-038) and "Pavement Remaining Service Interval Implementation Guidelines" (FHWA-HRT-13-050). At t...

  7. Assessment of low temperature cracking in asphalt pavement mixes and rheological performance of asphalt binders

    NASA Astrophysics Data System (ADS)

    Sowah-Kuma, David

    Government spends a lot of money on the reconstruction and rehabilitation of road pavements in any given year due to various distresses and eventual failure. Low temperature (thermal) cracking, one of the main types of pavement distress, contributes partly to this economic loss, and comes about as a result of accumulated tensile strains exceeding the threshold tensile strain capacity of the pavement. This pavement distress leads to a drastic reduction of the pavement's service life and performance. In this study, the severity of low temperature (thermal) cracking on road pavements selected across the Province of Ontario and its predicted time to failure was assessed using the AASTHO Mechanistic-Empirical Pavement Design Guide (MEPDG) and AASHTOWARE(TM) software, with inputs such as creep compliance and tensile strength from laboratory test. Highway 400, K1, K2, Y1, Sasobit, Rediset LQ, and Rediset WMX were predicted to have a pavement in-service life above 15 years. Additionally, the rheological performance of the recovered asphalt binders was assessed using Superpave(TM) tests such as the dynamic shear rheometer (DSR) and bending beam rheometer (BBR). Further tests using modified standard protocols such as the extended bending beam rheometer (eBBR) (LS-308) test method and double-edge notched tension (DENT) test (LS-299) were employed to evaluate the failure properties associated with in service performance. The various rheological tests showed K1 to be the least susceptible to low temperature cracking compared to the remaining samples whiles Highway 24 will be highly susceptible to low temperature cracking. X-ray fluorescence (XRF) analysis was performed on the recovered asphalt binders to determine the presence of metals such as zinc (Zn) and molybdenum (Mo) believed to originate from waste engine oil, which is often added to asphalt binders. Finally, the severity of oxidative aging (hardening) of the recovered asphalt binders was also evaluated using the

  8. Operating the Portable Seismic Pavement Analyzer

    DTIC Science & Technology

    2006-12-01

    8 Thickness versus modulus...amplitude versus time waveforms....................................................................... 9 Figure 10. A thickness versus Young’s modulus plot...modulus of portland cement concrete (PCC) and asphalt concrete (AC) pavements. Additional strength parameters necessary for structural pavement

  9. Evaluation of high performance pavement and bridge deck wearing surface repair materials.

    DOT National Transportation Integrated Search

    2016-08-01

    This project provided for a laboratory and field testing of several high performance repair materials for : pavements and concrete bridge decks. The main purpose was to provide ODOT with materials and procedures : to shorten road and bridge closures....

  10. Hot in-Place Recycling of Asphalt Pavements.

    DTIC Science & Technology

    1987-08-04

    WEARING SPECIFIED THICKNESS SURFACE • b. With ’Tew Aggregate, Modifier, And Asphalt ," ..’ . ,,, /f",’"" 4.. Figure 8. Typical Cold In-Place...34. .. .; ’-. , .?-. . ; ,....",.’.". ’. .- +-;-?,..- . .-’. , .. ’.,,..-, . ..- ?.,,,..-N ....-, ..,-. -".,,’." - HOT IN-PLACE RECYCLING OF ASPHALT PAVEMENTS An Engineering Report by0 Michael Lawrence Dowdy Submitted...for asphalt pavements. This type of asphalt pavement recycling process is becoming

  11. Assessment of Asphalt Concrete Reinforcement Grid in Flexible Pavements

    DTIC Science & Technology

    2016-05-01

    Guide for the Design of Pavement Structures (1993) remains in use and describes in detail the accepted procedures for both the design and maintenance...of pavement structures. Design considerations include pavement perfor- mance, traffic, subgrade soil, construction materials, environment, drain- age...Association of State Highway and Transportation Officials). 1993. Guide for the Design of Pavement Structures. Washington, DC: American Association of

  12. Finite element simulation of structural performance on flexible pavements with stabilized base/treated subbase materials under accelerated loading.

    DOT National Transportation Integrated Search

    2011-12-01

    Accelerated pavement testing (APT) has been increasingly used by state highway agencies in recent years for evaluating pavement structures and/or materials. However, running an APT experiment is expensive. It requires costly accelerated loading devic...

  13. Perform an investigation of the effects of increased reclaimed asphalt pavement (RAP) levels in dense graded friction courses.

    DOT National Transportation Integrated Search

    2015-04-01

    In this study, a total of 28 mixture combinations were designed and evaluated to : determine the maximum allowable amount of reclaimed asphalt pavement (RAP) : material in friction courses without jeopardizing pavement cracking performance. The : exp...

  14. Crackscope : automatic pavement cracking inspection system.

    DOT National Transportation Integrated Search

    2008-08-01

    The CrackScope system is an automated pavement crack rating system consisting of a : digital line scan camera, laser-line illuminator, and proprietary crack detection and classification : software. CrackScope is able to perform real-time pavement ins...

  15. Double layer drainage performance of porous asphalt pavement

    NASA Astrophysics Data System (ADS)

    Ji, Yangyang; Xie, Jianguang; Liu, Mingxi

    2018-06-01

    In order to improve the design reliability of the double layer porous asphalt pavement, the 3D seepage finite element method was used to study the drainage capacity of double layer PAC pavements with different geometric parameters. It revealed that the effect of pavement drainage length, slope, permeability coefficient and structure design on the drainage capacity. The research of this paper can provide reference for the design of double layer porous asphalt pavement in different rainfall intensity areas, and provide guides for the related engineering design.

  16. High performance concrete pavement in Indiana.

    DOT National Transportation Integrated Search

    2011-01-01

    Until the early 1990s, curling and warping of Portland cement concrete pavement did not concern : pavement engineers in many transportation agencies. Since beginning construction of the interstate system in the : United States in the late 1950s throu...

  17. Pavement marking extensions for deceleration lanes.

    DOT National Transportation Integrated Search

    1974-01-01

    Pavement markings have definite and important functions in a proper scheme of traffic control. One such marking, the pavement edge line, has received much favorable public reaction. One of the limitations of the edge line as conventionally applied is...

  18. Implementation of warm-mix asphalt mixtures in Nebraska pavements.

    DOT National Transportation Integrated Search

    2012-07-01

    The primary objective of this research is to evaluate the feasibility of several WMA mixtures as potential asphalt paving : mixtures for Nebraska pavements. To that end, three well-known WMA additives (i.e., Sasobit, Evotherm, and Advera : synthetic ...

  19. An algorithm for pavement crack detection based on multiscale space

    NASA Astrophysics Data System (ADS)

    Liu, Xiang-long; Li, Qing-quan

    2006-10-01

    Conventional human-visual and manual field pavement crack detection method and approaches are very costly, time-consuming, dangerous, labor-intensive and subjective. They possess various drawbacks such as having a high degree of variability of the measure results, being unable to provide meaningful quantitative information and almost always leading to inconsistencies in crack details over space and across evaluation, and with long-periodic measurement. With the development of the public transportation and the growth of the Material Flow System, the conventional method can far from meet the demands of it, thereby, the automatic pavement state data gathering and data analyzing system come to the focus of the vocation's attention, and developments in computer technology, digital image acquisition, image processing and multi-sensors technology made the system possible, but the complexity of the image processing always made the data processing and data analyzing come to the bottle-neck of the whole system. According to the above description, a robust and high-efficient parallel pavement crack detection algorithm based on Multi-Scale Space is proposed in this paper. The proposed method is based on the facts that: (1) the crack pixels in pavement images are darker than their surroundings and continuous; (2) the threshold values of gray-level pavement images are strongly related with the mean value and standard deviation of the pixel-grey intensities. The Multi-Scale Space method is used to improve the data processing speed and minimize the effectiveness caused by image noise. Experiment results demonstrate that the advantages are remarkable: (1) it can correctly discover tiny cracks, even from very noise pavement image; (2) the efficiency and accuracy of the proposed algorithm are superior; (3) its application-dependent nature can simplify the design of the entire system.

  20. Analyses Relating to Pavement Material Characterizations and Their Effects......

    DOT National Transportation Integrated Search

    1998-01-01

    This report presents the analysis conducted on relating pavement performance or response measures and design considerations to specific pavement layers utilizing data contained in the Long Term Pavement Performance Program National Information Manage...

  1. Wet night visibility of pavement markings.

    DOT National Transportation Integrated Search

    2004-01-01

    This report describes an investigation into the performance of pavement markings in wet night conditions. The performance of a typical pavement marking will degrade when it gets wet. This is a result of the flooding of the marking optics, thereby red...

  2. Pelletized Asphalt for Airfield Damage Repair

    DTIC Science & Technology

    2009-08-01

    The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing...terms of resistance to rutting because the binder will dissipate less energy as permanent deformation per load cycle (7). The high pavement... Vessel ) material at 10 radian/sec oscillatory shear and 31°C, and 5) a maximum stiffness of 300 MPa and a minimum creep slope of 0.3 at -12°C for the

  3. Two-vehicle injury severity models based on integration of pavement management and traffic engineering factors.

    PubMed

    Jiang, Ximiao; Huang, Baoshan; Yan, Xuedong; Zaretzki, Russell L; Richards, Stephen

    2013-01-01

    The severity of traffic-related injuries has been studied by many researchers in recent decades. However, the evaluation of many factors is still in dispute and, until this point, few studies have taken into account pavement management factors as points of interest. The objective of this article is to evaluate the combined influences of pavement management factors and traditional traffic engineering factors on the injury severity of 2-vehicle crashes. This study examines 2-vehicle rear-end, sideswipe, and angle collisions that occurred on Tennessee state routes from 2004 to 2008. Both the traditional ordered probit (OP) model and Bayesian ordered probit (BOP) model with weak informative prior were fitted for each collision type. The performances of these models were evaluated based on the parameter estimates and deviances. The results indicated that pavement management factors played identical roles in all 3 collision types. Pavement serviceability produces significant positive effects on the severity of injuries. The pavement distress index (PDI), rutting depth (RD), and rutting depth difference between right and left wheels (RD_df) were not significant in any of these 3 collision types. The effects of traffic engineering factors varied across collision types, except that a few were consistently significant in all 3 collision types, such as annual average daily traffic (AADT), rural-urban location, speed limit, peaking hour, and light condition. The findings of this study indicated that improved pavement quality does not necessarily lessen the severity of injuries when a 2-vehicle crash occurs. The effects of traffic engineering factors are not universal but vary by the type of crash. The study also found that the BOP model with a weak informative prior can be used as an alternative but was not superior to the traditional OP model in terms of overall performance.

  4. Molecular mechanisms controlling pavement cell shape in Arabidopsis leaves.

    PubMed

    Qian, Pingping; Hou, Suiwen; Guo, Guangqin

    2009-08-01

    Pavement cells have an interlocking jigsaw puzzle-shaped leaf surface pattern. Twenty-three genes involved in the pavement cell morphogenesis were discovered until now. The mutations of these genes through various means lead to pavement cell shape defects, such as loss or lack of interdigitation, the reduction of lobing, gaps between lobe and neck regions in pavement cells, and distorted trichomes. These phenotypes are affected by the organization of microtubules and microfilaments. Microtubule bands are considered corresponding with the neck regions of the cell, while lobe formation depends on patches of microfilaments. The pathway of Rho of plant (ROP) GTPase signaling cascades regulates overall activity of the cytoskeleton in pavement cells. Some other proteins, in addition to the ROPs, SCAR/WAVE, and ARP2/3 complexes, are also involved in the pavement cell morphogenesis.

  5. Laboratory evaluation of characteristics of recycled asphalt pavement in Kansas : technical summary.

    DOT National Transportation Integrated Search

    2011-09-01

    The use of recycled asphalt pavement (RAP) has been in practice since the 1930s and is necessary to reduce the construction cost due to rising prices of virgin aggregates and binder, to conserve these rapidly depleting resources, and to minimize prob...

  6. Evaluation of potential benefits of wider and brighter edge line pavement markings.

    DOT National Transportation Integrated Search

    2010-07-01

    This report documents the findings of a two-year study that investigated the potential benefits of wider : edge line pavement markings. There were four general tasks discussed in the report: 1) review of literature, : 2) survey of the state of the pr...

  7. The Rigid Pavement Database: Overview and Data Collection Plan

    DOT National Transportation Integrated Search

    1998-06-01

    The rigid pavement (RP) database contains historical distress data obtained from more than 400 continuously reinforced concrete pavements(CRCP) and jointed concrete pavements (JCP) across the state of Texas. Data collection efforts began in 1974 and ...

  8. Composite pavement systems : synthesis of design and construction practices.

    DOT National Transportation Integrated Search

    2008-01-01

    Composite pavement systems have shown the potential for becoming a cost-effective pavement alternative for highways with high and heavy traffic volumes, especially in Europe. This study investigated the design and performance of composite pavement st...

  9. A probabilistic and adaptive approach to modeling performance of pavement infrastructure

    DOT National Transportation Integrated Search

    2007-08-01

    Accurate prediction of pavement performance is critical to pavement management agencies. Reliable and accurate predictions of pavement infrastructure performance can save significant amounts of money for pavement infrastructure management agencies th...

  10. Local agency pavement marking plan : final report, July 2010.

    DOT National Transportation Integrated Search

    2010-07-01

    The proposed FHWA amendments to the MUTCD will change the way local agencies manage their pavement markings and places a : focus on pavement marking quality and management methods. This research effort demonstrates how a pavement marking maintenance ...

  11. WMA pavements in Oklahoma : moisture damage and performance issues.

    DOT National Transportation Integrated Search

    2013-08-01

    This study explored the potential effects of using different Warm Mix Asphalt (WMA) technologies on the rut, fatigue and moisture-induced damage potential of WMA pavements. This task was pursued in two levels: (i) performance evaluation of WMA and co...

  12. Subgrade moisture & temperature variations under road pavements in Virginia.

    DOT National Transportation Integrated Search

    1974-01-01

    In this investigation the changes in the subgrade moisture content under five road pavements ranging in age from new to about ten years old were determined and evaluated. The moisture content was determined by means of a nuclear moisture depth probe....

  13. Pavement markings and safety : tech transfer summary.

    DOT National Transportation Integrated Search

    2010-11-01

    Objective: This study explores the statistical relationship between crash occurrence probability and longitudinal pavement marking retroreflectivity. : Problem Statement: Previous research on pavement markings, from a safety perspective, tackled vari...

  14. Long-term Plan for Concrete Pavement Research and Technology--The Concrete Pavement Road Map : Volume II, Tracks

    DOT National Transportation Integrated Search

    2005-09-01

    The Long-Term Plan for Concrete Pavement Research and Technology (CP Road Map) is a holistic, strategic : plan for concrete pavement research and technology transfer. The CP Road Map is a 7- to 10-year plan that : includes 12 distinct but integrated ...

  15. Seasonal variations in the moduli of unbound pavement layers.

    DOT National Transportation Integrated Search

    2006-07-01

    The in situ moduli of unbound pavement materials vary on a seasonal basis as a function of temperature and moisture conditions. : Knowledge of these variations is required for accurate prediction of pavement life for pavement design and other pavemen...

  16. Performance of pavements designed with low-cost materials

    NASA Astrophysics Data System (ADS)

    Grau, R. W.; Yrjanson, W. A.; Packard, R. G.; Barksdale, R. D.; Potts, C. F.; Ruth, B. E.; Smith, L. L.; Huddleston, I. J.; Vinson, T. S.; Hicks, R. G.

    1980-04-01

    The following areas are discussed. Utilization of marginal aggregate materials for secondary road surface layers; econocrete pavements; current practices; construction and performance of sand-asphalt bases and performance of sand-asphalt and limerock pavements in Florida. Cement stabilization of degrading aggregates use of crushed stone screenings in highway construction (abridgement); and sulfur-asphalt pavement technology are also reviewed.

  17. 23 CFR 971.208 - Federal lands pavement management system (PMS).

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 23 Highways 1 2012-04-01 2012-04-01 false Federal lands pavement management system (PMS). 971.208... lands pavement management system (PMS). In addition to the requirements provided in § 971.204, the PMS... the concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide...

  18. 23 CFR 971.208 - Federal lands pavement management system (PMS).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 23 Highways 1 2010-04-01 2010-04-01 false Federal lands pavement management system (PMS). 971.208... lands pavement management system (PMS). In addition to the requirements provided in § 971.204, the PMS... the concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide...

  19. 23 CFR 973.208 - Indian lands pavement management system (PMS).

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 23 Highways 1 2013-04-01 2013-04-01 false Indian lands pavement management system (PMS). 973.208... PROGRAM Bureau of Indian Affairs Management Systems § 973.208 Indian lands pavement management system (PMS... concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide,” AASHTO...

  20. 23 CFR 973.208 - Indian lands pavement management system (PMS).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 23 Highways 1 2010-04-01 2010-04-01 false Indian lands pavement management system (PMS). 973.208... PROGRAM Bureau of Indian Affairs Management Systems § 973.208 Indian lands pavement management system (PMS... concepts described in the AASHTO's “Pavement Management Guide.” 1 1 “Pavement Management Guide,” AASHTO...

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