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A Mechanistic Method For Evaluation Of Layer Moduli And Overlay Design
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Book Synopsis A Mechanistic Method for Evaluation of Layer Moduli and Overlay Design by : NA. Ali
Download or read book A Mechanistic Method for Evaluation of Layer Moduli and Overlay Design written by NA. Ali and published by . This book was released on 1989 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nondestructive testing (NDT) has long been used to evaluate flexible pavement structures. The increasing popularity of nondestructive pavement evaluation methods, based on interpretation of surface deflection, has promoted the development of several types of NDT devices. One such device is the falling weight deflectometer (FWD), which is used for the purpose of pavement evaluation in North Carolina. This paper presents a methodology for the testing, evaluation, and determination of overlay thickness required for a given pavement section and subgrade condition. The overlay design procedure presented makes use of some of the recent developments for analysis and design of asphaltic concrete overlays. The evaluation of in-service pavements includes the use of the deflection parameters developed by testing of the existing pavements with known geometry for determining the moduli of various pavement layers and the required overlay thickness. The method utilizes empirical values and the VESYS structural subsystem as an integral approach complementary to each other.
Book Synopsis Development of a Mechanistic Overlay Design Procedure for Flexible Pavements by : Haiping Zhou
Download or read book Development of a Mechanistic Overlay Design Procedure for Flexible Pavements written by Haiping Zhou and published by . This book was released on 1990 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes the development of a mechanistic overlay design procedure. The mechanistic analysis represents a new trend in both new pavement and overlay design. The greatest advantage of the mechanistic pavement analysis is that it considers the fundamental characteristics of materials to be used, is capable of considering changes in loading and tire pressure, and characterizes the response of the pavement to traffic loads in terms of strains and/or stresses. This type of analysis allows practicing engineers to more realistically address pavement structure, materials, and other influential variables such as environmental impacts so that the behavior of the pavement may be better understood. One of the critical steps in using the mechanistic type pavement analysis is the determination of pavement layer properties (e.g, resilient modulus). In this study, methods commonly used for determining resilient modulus have been reviewed. Three existing mechanistic overlay design procedures were also reviewed. Based on the review, improved procedures for determining pavement layer moduli and overlay design seem to be necessary. Significant contributions of this study are the development and computerization of an improved backcalculation procedure (BOUSDEF) for determining pavement layer moduli and an improved mechanistic overlay design procedure (MECHOD). Initial evaluations on both procedures were performed. For BOUSDEF, three approaches were used: 1) comparing with hypothesized theoretical moduli, 2) comparing with other developed backcalculation programs, and 3) comparing with laboratory tested modulus values. The evaluation showed BOUSDEF provided favorable comparisons. Therefore, the program can be effectively used as a tool to make initial evaluation of deflection testing data for determining pavement layer moduli. For MECHOD, actual pavement data from the states of Oregon and Alaska were used. All pavements evaluated are conventional structures consisting of an asphalt concrete surface, an aggregate base and/or a subbase, over subgrade. The evaluation showed that the improved method provided very similar results to those of standard procedures (ODOT, AASHTO, and The Asphalt Institute). The BOUSDEF and MECHOD programs can be implemented together as a pavement evaluation and overlay design system. That is; 1) use BOUSDEF to backcalculate pavement layer moduli, and 2) use MECHOD to perform overlay design.
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :156051423X Total Pages :218 pages Book Rating :4.5/5 (65 download)
Book Synopsis Mechanistic-empirical Pavement Design Guide by : American Association of State Highway and Transportation Officials
Download or read book Mechanistic-empirical Pavement Design Guide written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2008 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nondestructive Testing of Pavements and Backcalculation of Moduli by : Albert Jasper Bush
Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by Albert Jasper Bush and published by ASTM International. This book was released on 1989 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Evaluation of Flexible Pavement Using Deflection Basin by :
Download or read book Structural Evaluation of Flexible Pavement Using Deflection Basin written by and published by . This book was released on 1989 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a methodology for testing, evaluation and determination of overlay thickness required for a given pavement section. The overlay design procedure presented makes use of some of the recent developments for analysis and design of asphaltic concrete overlays. The evaluation of in-service pavements includes the use of the deflection parameters developed by testing of the existing pavements with known geometry for determining the moduli of various pavement layers and the required overlay thickness. The method utilizes empirical values and VESYS structural subsystem as an integral approach complementary to each other. Six pavement sections across the State of North Carolina were selected for deflection testing. Deflection parameters were developed to characterize the deflection data from these pavement sections. In addition, VESYS structural system was used to develop nomographs for the interpretation of the measured deflection basin parameters. These nomographs were used to backcalculate the layer moduli form deflection parameters and known layer thicknesses using iterative solutions. The backcalculated layer moduli from these nomographs correspond to the climate conditions that happen to exist during the time of testing and must therefore be adjusted to other climatic conditions. A procedure for such an adjustment is also included in the design procedure. Many different methods have been developed for determining an overlay thickness. These methods can be categorized in three groups : component analysis, deflection based, and analytically based. A mechanistic procedure is described in this paper. This procedure is based on the data and findings of a previous research and has been used to evaluate in-service pavements in North Carolina using Falling Weight Deflectometer (FWD) deflection parameters. The procedure includes four major parts : (a) FWD deflection parameters and data collection, (b) back-calculation of layer moduli, (c) adjustment of layer moduli and (d) prediction of overlay thickness. For the covering abstract of this Conference see IRRD abstract number 853851.
Download or read book Special Report written by and published by . This book was released on 1989 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :1560510552 Total Pages :622 pages Book Rating :4.5/5 (65 download)
Book Synopsis AASHTO Guide for Design of Pavement Structures, 1993 by : American Association of State Highway and Transportation Officials
Download or read book AASHTO Guide for Design of Pavement Structures, 1993 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 1993 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.
Author :National Research Council (U.S.). Transportation Research Board Publisher :Transportation Research Board National Research ISBN 13 : Total Pages :132 pages Book Rating :4.3/5 ( download)
Book Synopsis Design and Performance of Flexible Pavements by : National Research Council (U.S.). Transportation Research Board
Download or read book Design and Performance of Flexible Pavements written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1986 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :ASTM Committee D-18 on Soil and Rock. Subcommittee D-4 on Road and Paving Materials Publisher :ASTM International ISBN 13 :0803118651 Total Pages :528 pages Book Rating :4.8/5 (31 download)
Book Synopsis Nondestructive Testing of Pavements and Backcalculation of Moduli by : ASTM Committee D-18 on Soil and Rock. Subcommittee D-4 on Road and Paving Materials
Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by ASTM Committee D-18 on Soil and Rock. Subcommittee D-4 on Road and Paving Materials and published by ASTM International. This book was released on 1994 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of June 1993 international symposium held in Atlanta, Georgia, called specifically to develop and standardized evaluation procedures for non-destructive methods of testing pavements. The 29 papers discuss analytical models and techniques, measurement and calculation techniques in the field and laboratory, problems and errors associated with backcalculation methods and design parameters, and testing for other pavement uses. Also includes a history of the quest for a standard and the status of that effort. Reproduced from typescripts. Annotation copyright by Book News, Inc., Portland, OR
Book Synopsis Mechanistic Evaluation of Rubblized Pcc Pavements by : Yigong Ji
Download or read book Mechanistic Evaluation of Rubblized Pcc Pavements written by Yigong Ji and published by Purdue University Press. This book was released on 2008-04-01 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a mechanistic approach and procedures for determining layer coefficients to characterize the in-situ behaviors of rubblized pavements. This procedure was developed based on the 1993 AASHTO Pavement Design Guide utilizing Falling Weight Deflectometer (FWD) testing and in-place simulation using back-calculation layer modulus. In order to evaluate the rubblized pavement systematically, twelve constructed pavement sections were extensively tested by FWD annually after construction. The FWD data was processed using the proposed mechanistic procedure. In addition, statistical analysis was conducted to compare the pavement structure parameters each year, including layer coefficient and in-situ resilient modulus using Analysis of Variance (ANOVA) and Z-tests. In the ANOVA, the comparison of the structure capacities derived from the field FWD tests with those from the mechanistic procedure supports the null hypothesis, which concluded there is no difference between the structural numbers from these two methods. Also, statistically, the layer coefficients in each year are significantly different. The in-situ resilient moduli for each year varied significantly. The results from Z-test show that for Hot Mixed Asphalt (HMA) layers, the layer coefficient confidence interval could be as high as 0.70 and also as low as 0.38. For the base layers, the layer coefficient confidence interval could be as high as 0.25 and also as low as 0.16. A layer coefficient of 0.42 is recommended for HMA and 0.22 for rubblized layer for the design of HMA overlay on rubblized PCC pavement.
Book Synopsis Advancement in the Design and Performance of Sustainable Asphalt Pavements by : Louay Mohammad
Download or read book Advancement in the Design and Performance of Sustainable Asphalt Pavements written by Louay Mohammad and published by Springer. This book was released on 2017-07-11 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume on “Advancement in the Design and Performance of Sustainable Asphalt Pavements” includes a collection of research and practical papers from an international research and technology activities on Mixture Design Innovation, Structural Pavement Design, Advancement in Production and Construction, Climate Changes and Effects on Infrastructure, Green Energy, Technology and Integration. The volume constitutes an important contribution in view of the urgent need to develop materials, designs, and practices to ensure the sustainability of transportation infrastructure. This volume is part of the proceedings of the 1st GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2017.
Book Synopsis Nondestructive Testing of Pavements and Backcalculation of Moduli by : Shiraz D. Tayabji
Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by Shiraz D. Tayabji and published by ASTM International. This book was released on 2000 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: As with the previous two symposia, the 32 papers from the June/July, 1999, Seattle symposium present advances in the nondestructive testing of pavements using conventional falling weight deflectometer techniques and other promising techniques such as ground penetrating radar, rolling weight deflecto
Book Synopsis Mechanistic Pavement Overlay Design by : Nicholas P. Vitillo
Download or read book Mechanistic Pavement Overlay Design written by Nicholas P. Vitillo and published by . This book was released on 1992 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Research Record written by and published by . This book was released on 1996 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis PRO 11: 4th International RILEM Conference on Reflective Cracking in Pavement Research in Practice by : A. O. Abd El Halim
Download or read book PRO 11: 4th International RILEM Conference on Reflective Cracking in Pavement Research in Practice written by A. O. Abd El Halim and published by RILEM Publications. This book was released on 2000 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mechanistic Evaluation and Calibration of the AASHTO Design Equations and Mechanistic Analysis of the SHRP Asphalt Surfaced Pavement Sections by : Gilbert Y. Baladi
Download or read book Mechanistic Evaluation and Calibration of the AASHTO Design Equations and Mechanistic Analysis of the SHRP Asphalt Surfaced Pavement Sections written by Gilbert Y. Baladi and published by . This book was released on 1994 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanistic evaluation of the American Association of State Highway and Transportation Officials (AASHTO) flexible design equations was conducted by using 243 artificial pavement sections with various layer properties, roadbed soil modulus, and traffic volumes. A mechanistic-based modification procedure of the effects of the AASHTO drainage coefficient is presented. A nomograph for estimating the effects of drainage coefficients on the expected life of the pavement structures is also presented and discussed. Finally, the results of the backcalculated layer moduli of some of the Strategic Highway Research Program asphalt surfaced General Pavement Studies sections are presented and the accuracy of the values briefly discussed.
Book Synopsis FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Progress Report. 1989 by :
Download or read book FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Progress Report. 1989 written by and published by . This book was released on 1989 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
