详情

Mechanistic Characterization of Soils and Aggregates

项目名称：	Mechanistic Characterization of Soils and Aggregates
摘要：	As the Utah Department of transportation (UDOT) moves to implement the Mechanistic-Empirical Pavement Design Guide (MEPDG), new information about the properties of individual pavement layers will be needed. Particular to soils and aggregates, the mechanistic-empirical pavement design process requires knowledge of Poisson's ratio, coefficient of lateral earth pressure, and resilient modulus as strength properties. While resilient modulus can be estimated in the MEPDG software from CBR and selected other parameters, the application of the correlations to typical Utah materials warrants investigation. Therefore, research to establish resilient modulus values for typical Utah materials is needed, and existing correlations among these test results and those of more commonly performed tests need to be evaluated and new correlations developed as needed; for example, developing correlations between modulus and CBR for typical Utah materials would be very useful to UDOT pavement and materials engineers. In addition, understanding the effects of freezing on the strength properties of soils and aggregates would be useful in determining representative properties to use as inputs in the MEPDG software. The objective of this study is to conduct mechanistic characterizations of typical Utah soils and aggregates to support implementation of the new MEPDG. Tasks for this study include (1) Conduct a literature review and prepare a summary of available information related to mechanistic characterization of soils and aggregates for the MEPDG and correlations between modulus and other properties; (2) Identify and obtain approximately 10 samples of soils and aggregates of greatest interest to UDOT; (3) Design laboratory experimentation to measure resilient modulus (at normal and freezing temperatures), as well as other selected strength properties of each material; (4) Perform analyses of test results, including evaluations of correlations used within the MEPDG software and calculations of representative modulus values for given climates within Utah; (5) Develop an implementation plan; and (6) Prepare a research report documenting the full project.
状态：	Active
资金：	75000.00
资助组织：	Utah Department of Transportation
项目负责人：	Nichol, Kevin
执行机构：	Brigham Young University
开始时间：	20110401
实际结束时间：	20130401
主题领域：	Highways；Pavements；I30: Materials