Download or read book Characterizing Seasonal Variations in Pavement Material Properties for Use in a Mechanistic empirical Design Procedure written by Jill Marie Ovik and published by . This book was released on 1998 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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.
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:
Download or read book Review of the New Mechanistic empirical Pavement Design Guide a Material Characterization Perspective written by and published by . This book was released on 2005 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterization of pavement materials in the three hierarchical design levels of the proposed mechanistic-empirical pavement design (MEPD) guide involves application of the dynamic modulus technique for asphalt concrete and the resilient modulus for unbound materials. This approach, if adequately implemented, is expected to improve the road design processes. The advance design level recommends using actual laboratory test data of the dynamic and resilient modulus determined under simulated environmental and traffic loading conditions. To circumvent the need for conducting the mechanical test in lower design levels, predictive equations and correlations established with physical properties are used to estimate the mechanistic properties needed as input to the design software. This paper examines the simplifications incorporated in the model using results of dynamic and resilient modulus tests performed at the National Research Council Canada (NRC). For the covering abstract of this conference see ITRD number E211426.
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
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:
Download or read book Material Properties for Implementation of Mechanistic empirical M E Pavement Design Procedures written by and published by . This book was released on 2004 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanistic empirical Pavement Design Guide Implementation Plan written by Todd E. Hoerner and published by . This book was released on 2007 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: As AASH is expected to eventually adopt the MEPDG at its primary pavement design method, it is critical that the SDDOT become familiar with the MEPGD documentation and associated design software. The research conducted under this project was a first step toward achieving this goal.
Download or read book Transportation Research Record written by and published by . This book was released on 2003 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Guidance for Selection of Unbound Pavement Layer Seasonal Stiffnesses written by Hannah Margaret Curran and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the benefits of using mechanistic-empirical (ME) design methods for pavements is the ability to calculate pavement response to various loading and climate conditions, and then in turn model the entire damage process that is expected to occur over the pavement life time. One property that is currently not accounted for within California’s ME design software (CalME) is the change in stiffness of unbound materials that may occur due to seasonal moisture patterns. Engineering properties of unbound material may change due to a variety of factors, such as fluctuations in water content, changes in suction during wetting or drying periods, changes in overburden stress, and geologic setting. Before implementing more complex relationships to model changes associated with different environmental factors, the University of California Pavement Research Center (UCPRC) wishes to evaluate the extent of variation that is observed in the field. The goals of this research are to evaluate whether or not these speculated seasonal changes in unbound material properties warrant further design optimization, and if so, how research to characterize such optimization should proceed in the future.In this research, an experiment was performed to evaluate if noticeable changes in subgrade stiffness can be identified and explained using available, pertinent, and easy to use pavement monitoring equipment. Testing was performed twice on sections across California, once in the wet season and once in the dry season, to get a broad picture of the types of materials present and their corresponding properties during wet and dry seasons. Monitoring of a test section at UC Davis was also performed to observe changes in stiffness occurring after rainfall events and during wetting and drying cycles. The literature and various laboratory experiments investigating the influence of moisture and suction on the resilient response of unbound materials strongly suggest that a large degree of variability in stiffness should be encountered in different moisture conditions. However, the results of the study revealed that a majority of the unbound material tested experienced minor, if any, changes in stiffness between the two rounds of testing. The most susceptible materials to stiffness variation were not necessarily the compacted subgrade material, but were the stabilized and unstabilized granular materials directly underlying the asphalt surface. While changes in moisture content and penetration resistance were observed between the two rounds of testing, they did not necessarily correspond to significant fluctuation in field-tested stiffness of the unbound materials; rather, other factors such as spatial variability, drainage conditions, soil type, and influences from overlying layers tended to have a much larger influence on the resilient response of these materials than did seasonal moisture change.
Download or read book Characterization of Unbound Materials for Mechanistic Empirical Pavement Design Guide MEPDG written by Jeyakaran Thavathurairaja and published by . This book was released on 2017 with total page 0 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.
Download or read book Department of Transportation and Related Agencies Appropriations for 1999 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and published by . This book was released on 1998 with total page 2014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FWD Testing and Seasonal Characterization of Pavement Materials for Use in Mechanistic Overlay Design written by Mohan H. Javaregowda and published by . This book was released on 1994 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Material Properties for Implementation of Mechanistic empirical M E Pavement Design Procedures in Ohio written by Basel A. Abdalla and published by . This book was released on 2003 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
