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Resilient Moduli Of Typical Missouri Soils And Unbound Granular Base Materials
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Book Synopsis Resilient Moduli of Typical Missouri Soils and Unbound Granular Base Materials by :
Download or read book Resilient Moduli of Typical Missouri Soils and Unbound Granular Base Materials written by and published by . This book was released on 2009 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project was to determine the resilient moduli for common Missouri subgrade soils and typical unbound granular base materials in accordance with the AASHTO T 307 test method. The results allow Missouri Department of Transportation pavement engineers to calibrate software included with the National Cooperative Highway Research Program Project 1-37A Mechanistic-Empirical Pavement Design Guide according to Missouri's conditions and materials. The test results included resilient moduli data from 27 common subgrade soils out of the 99 Missouri soil associations and from five unbound granular base materials. The subgrade soils, selected and provided by MoDOT, were tested at their optimum water content (as determined from AASHTO T 99 testing (AASHTO, 2001)) and at an elevated water content. The five unbound granular base materials, again selected and provided by MoDOT and representing a typical range in geologic source, were tested at two different gradations (typical as-delivered percent minus #200 sieve size and at an elevated amount of fines). All testing included three replications for all materials. Data are provided in the form of tables and graphs. As a part of the granular base material resilient moduli (Mr) specimen preparation deliberation, MDD and OMC were determined for each of the 10 material/gradation combinations. The Mr testing program results indicate that both the material source and fines content are highly significant in the level of attained resilient modulus. In regard to material source, the range between the highest and lowest Mr values was more than two-fold. Also, two of the five aggregate sources suffered a 15 to 20% loss in Mr with the addition of five percent fines.
Book Synopsis Prediction of the Resilient Modulus of Unbound Granular Base and Subbase Materials Based on the California Bearing Ratio and Other Test Data by : Steven Michael Lusher
Download or read book Prediction of the Resilient Modulus of Unbound Granular Base and Subbase Materials Based on the California Bearing Ratio and Other Test Data written by Steven Michael Lusher and published by . This book was released on 2004 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The paper describes methods for predicting the reilient (elastic) modulus of unbound granular base and subbase materials used in flexible pavement construction based on California Bearing Ratio (CBR) and/or other test data. Current pavement design methods employ relationships that estimate the resilient modulus from CBR results. The most commonly referenced of these relationships are limited in that they were developed using roadbed soils with CBR values no larger than approximately 15%. Therefore, it could be helpful if a model were available that would reliably predict the resilient modulus over a wider range of CBR values and be more specific to unbound granular materials. In this study, four different Missouri aggregates were analyzed that are commonly used in pavement base layers. Two of the aggregates were gravels and two were crushed stone."--Abstract, leaf iii.
Book Synopsis Proceedings of the Indian Geotechnical Conference 2019 by : Satyajit Patel
Download or read book Proceedings of the Indian Geotechnical Conference 2019 written by Satyajit Patel and published by Springer Nature. This book was released on 2021-06-04 with total page 779 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Modelling of the Resilient and Permanent Deformation Behaviour of Subgrade Soils and Unbound Granular Materials by : Haithem Soliman
Download or read book Modelling of the Resilient and Permanent Deformation Behaviour of Subgrade Soils and Unbound Granular Materials written by Haithem Soliman and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory characterization of subgrade soils and unbound granular materials is an essential component of the Mechanistic-Empirical Pavement Design Guide (Pavement ME). The design thickness and performance of a pavement structure are highly dependent on the deformation behaviour of subgrade and granular material. Specifications for granular materials vary among transportation agencies based on the availability of materials, climatic conditions, and function. Specifications aim to provide durable materials that meet design requirements and achieve the target design life with cost effective materials. The objectives of the research are to: • evaluate resilient modulus of typical fine-grained soils under traffic loading. • evaluate resilient modulus, permanent deformation, and permeability of typical unbound granular materials. • evaluate the effect of moisture and fines fraction on the performance of unbound granular materials and subgrade soil. • develop prediction models for resilient modulus to improve reliability of Level 2 inputs in the Pavement ME. • provide test data in support of updating Manitoba Infrastructure and Transportation specifications for unbound granular materials to improve the performance of pavement structures. Resilient modulus tests were conducted on three types of subgrade soil (high plastic clay, sandy clay, and silty sand/sandy silt) at four levels of moisture content. Resilient modulus, permanent deformation and permeability tests were conducted on six gradations representing two types of granular material (100% crushed limestone and gravel) at two levels of moisture content. Prediction models were developed for resilient modulus and compared to the models developed under the Long Term Pavement Performance program. The proposed models provided more reliable predictions with lower root mean square error. The deformation behaviour of the granular materials was classified according to the shakedown and dissipated energy approaches. Among the tested fines contents, limestone and gravel materials with optimum fines contents of 4.5% and 9%, respectively, had better resistance to plastic deformation and higher resilient modulus. The dissipated energy approach can be used to determine the stress ratio for the boundary between post compaction and stable zones from multistage triaxial testing. Result of permeability tests showed that the hydraulic conductivity of unbound granular material increased as the fines content decreased.
Book Synopsis Laboratory determination of resilient modulus of Missouri subgrade soils by :
Download or read book Laboratory determination of resilient modulus of Missouri subgrade soils written by and published by . This book was released on 1990 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laboratory Determination of Resilient Modulus of Missouri Subgrade Soils by :
Download or read book Laboratory Determination of Resilient Modulus of Missouri Subgrade Soils written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Resilient Properties of Unsaturated Base Materials by : Ranjan Kumar Rout
Download or read book Resilient Properties of Unsaturated Base Materials written by Ranjan Kumar Rout and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A pavement system basically consists of a surface layer, a base course, a subbase (optional) and the subgrade. As per MEPDG and 1993 AASHTO flexible pavement design guide Resilient Modulus (MR) is used as the primary input parameter to determine the stiffness parameters and the constitutive behavior of pavement components, such as subgrade and unbound bases. Generally, pavements are constructed on compacted soils that are typically unsaturated with degrees of saturation varying from 75 to 90%. The main focus of this research is to determine the effect of matric suction on the resilient moduli property of the base materials. The second objective of the research is to study the use of MEPDG models to calibrate resilient moduli properties either as a function of moisture content or soil suction variables. In order to assess these objectives, these unbound materials were tested using suction controlled MR and moisture controlled MR procedures. Amendments were done by preparing the specimens at five different moisture content and dry density conditions. Suction controlled MR testing took longer time to reach the equilibrium conditions and the results obtained were close to the results obtained from moisture controlled MR procedure. The initial suction conditions are studied using Fredlund device (Tempe cell). Test results indicate that the specimens compacted on the dry side of the optimum have high resilient modulus due to the stress hardening behavior. MEPDG program procedure was followed to predict the soil water characteristic curve. Lastly, two three model parameter models developed by Cary and Zapata (2010) and Modified Universal model are studied and analyzed in detail. Validity of the correlation equations are addressed by comparing measured MR to predicted MR values. Results suggest that the models used are well suited for predicting the resilient modulus and soil water characteristic curve of the two unbound base materials.
Book Synopsis Final Report on Determination of the Resilient Modulus of Wisconsin Granular Base and Subgrade Soils by : Tuncer B. Edil
Download or read book Final Report on Determination of the Resilient Modulus of Wisconsin Granular Base and Subgrade Soils written by Tuncer B. Edil and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Pavement Design through Full-scale Accelerated Pavement Testing by : David Jones
Download or read book Advances in Pavement Design through Full-scale Accelerated Pavement Testing written by David Jones and published by CRC Press. This book was released on 2012-10-08 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pack: Book and CDInternationally, full-scale accelerated pavement testing, either on test roads or linear/circular test tracks, has proven to be a valuable tool that fills the gap between models and laboratory tests and long-term experiments on in-service pavements. Accelerated pavement testing is used to improve understanding of pavement behavior,
Book Synopsis Final Report on Determination of the Resilient Modulus of Wisconsin Granular Base and Subgrade Soils by : Tuncer B. Edil
Download or read book Final Report on Determination of the Resilient Modulus of Wisconsin Granular Base and Subgrade Soils written by Tuncer B. Edil and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a Predictive Model for the Resilient Modulus of Unbound Materials by : Dragos Andrei
Download or read book Development of a Predictive Model for the Resilient Modulus of Unbound Materials written by Dragos Andrei and published by . This book was released on 2003 with total page 1204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NDT Technology for Quality Assurance of HMA Pavement Construction by : Harold L. Von Quintus
Download or read book NDT Technology for Quality Assurance of HMA Pavement Construction written by Harold L. Von Quintus and published by Transportation Research Board. This book was released on 2009 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program
Book Synopsis Resilient Modulus of Freeze - Thaw Affected Granular Soils for Pavement Design and Evaluation, Part 1: Laboratory Tests on Soils from Winchendon, Massachusetts, Test Sections by : Cold Regions Research and Engineering Laboratory (U.S.)
Download or read book Resilient Modulus of Freeze - Thaw Affected Granular Soils for Pavement Design and Evaluation, Part 1: Laboratory Tests on Soils from Winchendon, Massachusetts, Test Sections written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1986 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is the first of a series of four reports about laboratory and field testing of various granular road and airfield subgrades. This report details the acquisition, testing and analysis of six soils from a test site in Winchendon, Massachusetts. Repeated load triaxial tests were done on frozen and thawed soils to characterize the variations in their resilient properties through out the seasons. Linear regression yielded empirical equations relating the resilient modulus to applied stress, unfrozen water content (for frozen soils), moisture tension (for thawed soils) and density. Equipment and test procedures (given in detail) were developed that allowed simulation in the laboratory of the gradual recovery of stiffness that occurs in the field after thawing. The resilient moduli were strongly dependent on soil state, dropping at least two orders of magnitude upon thawing. For all soils the moduli increased with increasing confining stress, generally decreased with increasing principal stress ratio, and increased with increasing moisture tension levels. The resilient moduli increased by a factor of approximately two as the materials recovered from the effects of a freeze-thaw cycle. This recovery process is well modeled as a function of soil moisture tension level. The stress sensitivity did not appear to be a function of the soil moisture tension level. The report also includes tabulations of all the repeated load triaxial test data.
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 Resilient Modulus Testing for Pavement Components by : Mary Stroup-Gardiner
Download or read book Resilient Modulus Testing for Pavement Components written by Mary Stroup-Gardiner and published by ASTM International. This book was released on 2003 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Resilient modulus indicates the stiffness of a soil under controlled confinement conditions and repeated loading. The test is intended to simulate the stress conditions that occur in the base and subgrade of a pavement system. Resilient modulus has been adopted by the U.S. federal highway administration as the primary performance parameter for pavement design. We thank those who prepared these papers, the reviewers who provided anonymous peer reviews, and those who participated in the symposium. We hope this STP encourages more work to improve the testing standard and the value of the Resilient Modulus test."
Book Synopsis Third International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics [proceedings] by : Shamsher Prakash
Download or read book Third International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics [proceedings] written by Shamsher Prakash and published by . This book was released on 1995 with total page 580 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.
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