Estimate Stiffness Of Subgrade And Unbound Materials For Pavement Design PDF Download
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Author | : Anand J. Puppala |
Publisher | : Transportation Research Board |
Total Pages | : 139 |
Release | : 2008 |
Genre | : Technology & Engineering |
ISBN | : 0309098114 |
Download Estimating Stiffness of Subgrade and Unbound Materials for Pavement Design Book in PDF, ePub and Kindle
At head of title: National Cooperative Highway Research Program.
Author | : Transportation Research Board. National Cooperative Highway Research Program |
Publisher | : |
Total Pages | : |
Release | : 2008 |
Genre | : |
ISBN | : |
Download Estimate Stiffness of Subgrade and Unbound Materials for Pavement Design Book in PDF, ePub and Kindle
Author | : Anand J. Puppala |
Publisher | : |
Total Pages | : |
Release | : |
Genre | : Electronic book |
ISBN | : |
Download NCHRP Synthesis 382 Book in PDF, ePub and Kindle
Author | : Hani Hasan Titi |
Publisher | : |
Total Pages | : 316 |
Release | : 2011 |
Genre | : Pavements |
ISBN | : |
Download Determination of Resilient Modulus Values for Typical Plastic Soils in Wisconsin Book in PDF, ePub and Kindle
The objectives of this research are to establish a resilient modulus test results database and to develop correlations for estimating the resilient modulus of Wisconsin fine-grained soils from basic soil properties. A laboratory testing program was conducted on representative Wisconsin fine-grained soils to evaluate their physical and compaction properties. The resilient modulus of the investigated soils was determined from the repeated load triaxial (RLT) test following the AASHTO T307 procedure. The laboratory testing program produced a high-quality and consistent test results database.
Author | : Hannah Margaret Curran |
Publisher | : |
Total Pages | : |
Release | : 2016 |
Genre | : |
ISBN | : 9781369615258 |
Download Guidance for Selection of Unbound Pavement Layer Seasonal Stiffnesses Book in PDF, ePub and Kindle
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.
Author | : Erol Tutumluer |
Publisher | : Springer Nature |
Total Pages | : 976 |
Release | : 2021-09-05 |
Genre | : Science |
ISBN | : 3030772349 |
Download Advances in Transportation Geotechnics IV Book in PDF, ePub and Kindle
This volume presents selected papers presented during the 4th International Conference on Transportation Geotechnics. The papers address the geotechnical challenges in design, construction, maintenance, monitoring, and upgrading of roads, railways, airfields, and harbor facilities and other ground transportation infrastructure with the goal of providing safe, economic, environmental, reliable and sustainable infrastructures. This volume will be of interest to postgraduate students, academics, researchers, and consultants working in the field of civil and transport infrastructure.
Author | : Satyajit Patel |
Publisher | : Springer Nature |
Total Pages | : 159 |
Release | : 2021-03-18 |
Genre | : Science |
ISBN | : 9813365900 |
Download Indian Geotechnical Conference 2019 Book in PDF, ePub and Kindle
This book comprises select proceedings of the annual conference of the Indian Geotechnical Society. The conference brings together research and case histories on various aspects of geotechnical and geoenvironmental engineering. The book presents papers on geotechnical applications and case histories, covering topics such as (i) Characterization of Geomaterials and Physical Modelling; (ii) Foundations and Deep Excavations; (iii) Soil Stabilization and Ground Improvement; (iv) Geoenvironmental Engineering and Waste Material Utilization; (v) Soil Dynamics and Earthquake Geotechnical Engineering; (vi) Earth Retaining Structures, Dams and Embankments; (vii) Slope Stability and Landslides; (viii) Transportation Geotechnics; (ix) Geosynthetics Applications; (x) Computational, Analytical and Numerical Modelling; (xi) Rock Engineering, Tunnelling and Underground Constructions; (xii) Forensic Geotechnical Engineering and Case Studies; and (xiii) Others Topics: Behaviour of Unsaturated Soils, Offshore and Marine Geotechnics, Remote Sensing and GIS, Field Investigations, Instrumentation and Monitoring, Retrofitting of Geotechnical Structures, Reliability in Geotechnical Engineering, Geotechnical Education, Codes and Standards, and other relevant topics. The contents of this book are of interest to researchers and practicing engineers alike.
Author | : American Association of State Highway and Transportation Officials |
Publisher | : AASHTO |
Total Pages | : 218 |
Release | : 2008 |
Genre | : Pavements |
ISBN | : 156051423X |
Download Mechanistic-empirical Pavement Design Guide Book in PDF, ePub and Kindle
Author | : Harold L. Von Quintus |
Publisher | : |
Total Pages | : 54 |
Release | : 2007 |
Genre | : Pavements, Asphalt |
ISBN | : |
Download Evaluation of Procedure to Estimate Subgrade Resilient Modulus for Use in Pavement Structural Design Book in PDF, ePub and Kindle
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.
Author | : James A. Schneider |
Publisher | : |
Total Pages | : 300 |
Release | : 2011 |
Genre | : Pavements |
ISBN | : |
Download Cone Penetrometer Comparison Testing Book in PDF, ePub and Kindle
A total of 61 cone penetration tests were performed at 14 sites in the state of Wisconsin. Data reinforced conclusions from practice in Minnesota and previously performed test programs related to the Marquette Interchange and Mitchell interchange project that use of the CPT can be successful in glacial geologies. Within in this study CPTs were performed to depths in excess of 75 feet in alluvial deposits, outwash, and lacustrine soils. Difficulties were encountered in clay tills and fill placed for highway structures. However, previous experience in Milwaukee by commercial CPT operators had success in clayey tills of eastern Wisconsin.