Download or read book Method for Separately Evaluating the Structural Performance of Subgrades and the Overlying Flexible Pavements written by Nari K. Vaswani and published by . This book was released on 1972 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method for Separately Evaluating the Structural Performance of Subgrades and the Overlying Flexible Pavements written by Nari K. Vaswani and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method for Evaluating the Structural Performance of Subgrades And or the Overlying Flexible Pavements written by Nari K. Vaswani and published by . This book was released on 1970 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The structural evaluation of flexible pavement is now carried out mostly by deflection measuring devices such as the dynaflect or Benkelman beam. The object of this investigation was to determine whether the properties of the deflected basin measured by these devices on the pavement surfaces could enable evaluation of the subgrade and/or its overlying pavement separately. The properties of the deflected basin are defined by the maximum deflection and the spreadability, which is the average deflection expressed as a percentage of the maximum deflection. A theoretical analysis showed that these properties are a function of the modulus of elasticity of the subgrade, the average modulus of elasticity of the pavement over the subgrade, and the thickness index of the overlying pavement. A general chart was developed which correlates maximum deflection and spreadability with (i) the subgrade strength, (ii) the average pavement strength, and (iii) the thickness index of the pavement. This chart was tested for structural evaluations of the subgrade and/or its overlying pavement for satellite projects in Virginia. Ten typical examples of the satellite projects are given in the report and the change in their structural behavior with time is discussed.

Download or read book Proceedings of the Pavement Management Workshop written by Ronald L. Terrel and published by . This book was released on 1978 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Highway Research Record written by and published by . This book was released on 1971 with total page 1130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Structural Evaluation Methodology for Pavements Based on Dynamic Deflections written by Waheed Uddin and published by . This book was released on 1985 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flexible Pavement Performance Evaluation Using Deflection Criteria written by R. J. Wedner and published by . This book was released on 1980 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Project monitored flexible pavement dynamic deflections, roughness, and distress over a six-year period. Results show present surface condition and serve as a basis for evaluating rehabilitation needs.

Download or read book Mechanical Alteration of the Texture of Old Concrete Pavement with the Klarcrete Machine written by Marion F. Creech and published by . This book was released on 1974 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pavement Systems written by and published by . This book was released on 1971 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Structural Performance of Flexible Pavements Under Extreme Events written by Narges Matini and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selected Library Acquisitions written by United States. Department of Transportation and published by . This book was released on with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book HRIS Abstracts written by and published by . This book was released on 1988 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interpretation of Fwd Data when Pavement Layers are Not Intact written by Y. Richard Kim and published by . This book was released on 1999 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: When FWD tests are performed on broken or cracked pavements (of which information is crucial in making rehabilitation and overlay decisions), the multi-layered elastic theory-based backcalulation programs assume that the effect of these discontinuities in a cracked layer on deflection basins would be accounted for by the reduction of the elastic modulus for that layer. However, it has been concluded and confirmed by researchers and practitioners that the backcalculation algorithms based on the multi-layered elastic theory produce large variation in the algorithms based on the multi-layered elastic theory produce large variation in the 'effective' moduli of the cracked layers. Studies have also shown that significant errors in the backcalculated pavement moduli can accrue from performing a static analysis of what is inherently a dynamic test. Unfortunately, dynamic analysis usually involves complex calculations and requires significant computation time, thus making it impracticable for routine applications. This study presents a methology based on deflection basin parameters.

Download or read book Evaluation of Procedure to Estimate Subgrade Resilient Modulus for Use in Pavement Structural Design written by Harold L. Von Quintus and published by . This book was released on 2007 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Kansas Department of Transportation (DOT) uses the 1993 DARWin version of the 1986 AASHTO Guide to design rigid and flexible pavements. One of the inputs needed for the flexible pavement design procedure is the modulus of the subgrade soils, which has an effect on the total pavement thickness. Different procedures can be used to estimate the effective roadbed resilient modulus for flexible pavement design and effective modulus of subgrade reaction for rigid pavement design. As part of the study entitled Determination of the Appropriate Use of Pavement Surface History in the KDOT Life-Cycle Cost Analysis Process, an evaluation of the procedure that Kansas DOT uses to estimate the effective subgrade resilient modulus was completed. This report provides the results of that evaluation.

Download or read book Evaluation of Experimental Flexible Pavements written by Kenneth H. McGhee and published by . This book was released on 1979 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 assess the flexibility of these concepts for further use.

Download or read book Transportation Research Record written by and published by . This book was released on 1988 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Public Roads written by and published by . This book was released on 1972 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: