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Author : Gary J. Wang
Publisher :
ISBN 13 :
Total Pages : 390 pages
Book Rating : 4.:/5 (34 download)
Download or read book Seasonal Variation of Flexible Pavement Backcalculated Moduli written by Gary J. Wang and published by . This book was released on 1995 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : JM. Ovik
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (125 download)
Download or read book Seasonal Variations in Backcalculated Pavement Layer Moduli in Minnesota written by JM. Ovik and published by . This book was released on 2000 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in flexible pavement design have prompted agencies to move toward the development and use of mechanistic-empirical (M-E) design procedures. The purpose of this paper is to analyze seasonal trends in flexible pavement layer moduli in order to calibrate a mechanistic-empirical design procedure specific to Minnesota. The relationships investigated were between climate factors, surface and subsurface conditions, and pavement material properties. The results presented focus on the base and subgrade layers and show that the layer moduli vary with the state of moisture in the pavement. The data used to develop this approach were collected from four flexible pavement Long Term Pavement Performance Seasonal Monitoring Program sites (LTPP SMP) and the Minnesota Road Research Project (Mn/ROAD). Temperature data are used in this study to characterize the severity of a winter and to approximate the onset of freezing and thawing cycles. Finally, seasonal trends in pavement layer moduli were quantified for use in an M-E design of flexible pavements.
Author : Shiraz D. Tayabji
Publisher : ASTM International
ISBN 13 : 0803128584
Total Pages : 534 pages
Book Rating : 4.8/5 (31 download)
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
Author : Jill M. Ovik
Publisher :
ISBN 13 :
Total Pages : 238 pages
Book Rating : 4.:/5 (1 download)
Download or read book Characterizing Seasonal Variations in Pavement Material Properties for Use in a Mechanistic-empirical Design Procedure written by Jill M. Ovik and published by . This book was released on 2000 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seasonal Variations of Pavements written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Falling Weight Deflectometer (FWD) is become a popular device for measuring deflection basins used for backcalculation of layered elastic properties of pavements systems. It was used to study the seasonal variation of asphalt pavements in the severe climatic conditions met in Quebec. FWD tests were carried out on five road sections, located on the north shore of the St-Lawrence River between Quebec and Trois-Riviáeres, and selected on the base of one granular and four cohesive subgrade soils. Each site was generally characterized by four boreholes and visual observations and also equipped with one frostprobe and two piezometers. FWD deflection tests were conducted at regular time intervals over a one year period initiated in November 1993. The backcalculated moduli were determined with the VIEM and VIEMBACK programs developed by the National Research Council of Canada. This paper discussed some of the research findings obtained from three sites. The use of the backcalculation approach for quantifying seasonal variations in subgrade stiffness due to environmental changes is promising. In spite of the fact that the frost depth is more important in the granular subgrade with 2,6 m, the backcalculated subgrade modulus was found constant after the thaw period up to the beginning of the cold time in December. In the other cases with cohesive subgrade and frost depth of 1,6 m, the backcalculated subgrade stiffness have shown a significant reduction upon thawing, followed by a gradual recovery in time. The seasonal effects on long term performance have been evaluated with structural life model simulation. Relative damage factors have been determined in term of fatigue failure and permanent deformation to take into account in the design of flexible pavements. For the covering abstract of this conference see IRRD number 872978.
Author : Samuel H. Carpenter
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (891 download)
Download or read book Layer Coefficients for Flexible Pavements written by Samuel H. Carpenter and published by . This book was released on 1990 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mustaque Hossain
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.3/5 (555 download)
Download or read book Seasonal and Hourly Variation of Pavement Deflections Measured with the Falling Weight Deflectometer (FWD) written by Mustaque Hossain and published by . This book was released on 1996 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research project was to evaluate and quantify the effect of seasonal variation in material properties on the deflections measured with the Falling Weight Deflectometer (FWD). The study was initiated to quantify the effects of moisture content of subgrade soil and pavement temperature on the structural response of the pavement. The data collected from October 1993 to September 1994 at each site included deflections using a Dynatest 8000 FWD, pavement surface and air temperatures while conducting FWD tests, monthly precipitation and average air temperature for five days preceding the FWD tests and moisture content in the subgrade using principles of time domain reflectometry (TDR).
Author : EO. Lukanen
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (125 download)
Download or read book Variations in Backcalculated Pavement Layer Moduli in LTPP Seasonal Monitoring Sites written by EO. Lukanen and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seasonal variations in structural parameters were calculated from Falling Weight Deflectometer data on 25 LTPP flexible seasonal monitoring sections. In all, 23,976 deflection basins were analyzed. The deflection basins were collected monthly between the fall of 1993 and the spring of 1995. The test locations were distributed around North America from Saskatchewan to South Texas and from Idaho to Maine. The sections all consisted of asphalt surfacing and granular bases (and some granular subbases) over subgrades. Asphalt thicknesses ranged from 46 to 277\mm. Seasonal variations observed on selected sections in this database and documented in this paper include variations in asphaltic materials with temperature, variations in moduli of the unbound materials with precipitation, and variations in moduli of unbound materials due to freeze/thaw. For moderately thick to thick asphalt sections (>125 mm) the temperature dependency can clearly be seen in the deflection basins. As expected, this variation in deflections, and AC modulus is sinusoidal over the year. The amplitude of the sinusoidal variations were found to be heavily influenced by the thickness of the AC layer. Thicker AC sections exhibited higher sinusoidal variations. Base and subgrade values tended to be influenced by temperature but remained more consistent throughout the year except in cases where freezethaw effects were seen. During freeze conditions, the moduli of the unbound (base and subgrade) layers drastically increased.
Author : Cheryl Allen Richter
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (52 download)
Download or read book Seasonal Variations in the Moduli of Unbound Pavement Layers written by Cheryl Allen Richter and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Albert Jasper Bush
Publisher : ASTM International
ISBN 13 : 0803112602
Total Pages : 701 pages
Book Rating : 4.8/5 (31 download)
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:
Author : National Research Council (U.S.). Transportation Research Board
Publisher : Transportation Research Board National Research
ISBN 13 :
Total Pages : 148 pages
Book Rating : 4.3/5 ( download)
Download or read book Backcalculation of Pavement Moduli, 1991 written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1991 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seasonal Variation in Material Properties of a Flexible Pavement written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Seasonal variation of temperature and moisture cause considerable changes in the load-carrying capacity of pavements in geographical areas subject to extreme freeze/thaw conditions. Pavement engineers in these areas must be able to quantify the variation in the load-carrying capacity of a pavement in order to design it adequately. The Seasonal Monitoring Program (SMP) of the Long Term Pavement Performance (LTPP) study of the U.S.A. Federal Highway Administration (FHWA) is monitoring seasonal variations in Falling Weight Deflectometer (FWD) deflections, air temperature, rainfall, soil temperature, moisture content, and soil electrical resistance at numerous sites across North America. The present study relates changes in pavement load carrying capacity represented by the pavement layer resilient moduli to selected environmental factors on the SMP site near Oak Lake, Manitoba. The most significant environmental parameters causing seasonal variation in pavement layer resilient moduli are identified as surface temperature (asphalt layer) and Thawing Index (base and subgrade layers). The examination of the material properties of this single pavement site during any time of the year is an important first step towards the adoption of mechanistic pavement design and rehabilitation procedures at the Manitoba Department of Highways and Transportation. For the covering abstract of this conference see IRRD number 872978.
Author : K. Anupam
Publisher : CRC Press
ISBN 13 : 1000343480
Total Pages : 501 pages
Book Rating : 4.0/5 (3 download)
Download or read book Advances in Materials and Pavement Performance Prediction II written by K. Anupam and published by CRC Press. This book was released on 2020-12-08 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inspired from the legacy of the previous four 3DFEM conferences held in Delft and Athens as well as the successful 2018 AM3P conference held in Doha, the 2020 AM3P conference continues the pavement mechanics theme including pavement models, experimental methods to estimate model parameters, and their implementation in predicting pavement performance. The AM3P conference is organized by the Standing International Advisory Committee (SIAC), at the time of this publication chaired by Professors Tom Scarpas, Eyad Masad, and Amit Bhasin. Advances in Materials and Pavement Performance Prediction II includes over 111 papers presented at the 2020 AM3P Conference. The technical topics covered include: - rigid pavements - pavement geotechnics - statistical and data tools in pavement engineering - pavement structures - asphalt mixtures - asphalt binders The book will be invaluable to academics and engineers involved or interested in pavement engineering, pavement models, experimental methods to estimate model parameters, and their implementation in predicting pavement performance.
Author :
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.3/5 (555 download)
Download or read book Analyses Relating to Pavement Material Characterizations and Their Effects on Pavement Performance written by and published by . This book was released on 1998 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 Management System. The goal of this research activity was to enhance implementation and use of the 1993 AASHTO Design Guide through improved materials characterizations. Specifically, the focus of this research activity was to identify the differences that exist between laboratory measured and backcalculated resilient moduli; determine the applicability of the C values, drainage coefficients, and relative damage factors that are included in the Design Guide; and provide procedures to adequately consider the seasonal variation of material properties as related to flexible pavement designs. Based on these results, design pamphlets have been prepared in support of the AASHTO Design Guide. These design pamphlets are documented and included in other reports. The results reported here form the basis and background for those design pamphlets.
Author :
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.:/5 (1 download)
Download or read book Material Characterization and Seasonal Variation in Material Properties written by and published by . This book was released on 2006 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Veera Venkata Koppisetti
Publisher :
ISBN 13 :
Total Pages : 316 pages
Book Rating : 4.:/5 (23 download)
Download or read book Modeling Seasonal Variation in Pavement Subgrade Modulus written by Veera Venkata Koppisetti and published by . This book was released on 2004 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Prithvi S. Kandhal
Publisher : ASTM International
ISBN 13 : 0803124929
Total Pages : 182 pages
Book Rating : 4.8/5 (31 download)
Download or read book Flexible Pavement Rehabilitation and Maintenance written by Prithvi S. Kandhal and published by ASTM International. This book was released on 1998 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers from a December 1997 symposium detail innovative and effective strategies for rehabilitation and maintenance of existing highways. Primary topics addressed include pavement evaluation for rehabilitation and management, cold in-place recycling techniques for pavement rehabilitation, effectiven
