详情

RES2013-42: Evaluation of Intelligent Compaction in Asphalt Pavement Construction in Tennessee

项目名称：	RES2013-42: Evaluation of Intelligent Compaction in Asphalt Pavement Construction in Tennessee
摘要：	This study aims to evaluate the applicability of intelligent compaction (IC) in construction of soil subgrade, granular bases and/or subbases, and asphalt layers in flexible pavements in Tennessee. In the research project, a total of six asphalt mixture projects and one soil project were constructed to evaluate the IC technologies for various construction materials. Three different in-situ testing methods were employed to evaluate the correlation between in-situ soil properties and IC measurement values (ICMVs), and four in-situ and laboratory testing methods were used to evaluate the relationship between physical and mechanical properties of asphalt mixtures and ICMVs. Simple linear and multiple linear regression analyses were performed to develop correlations between ICMVs and various in-situ test results. Geostatistical semivariogram analysis was performed on spatially referenced ICMVs to evaluate the spatial uniformity of IC measurements and to quantify the compaction quality of soil and asphalt mixtures. Based on the results of the laboratory and on-site tests, the following conclusions can be summarized: (1) For soil compaction, water content of soil had a significant effect on compaction meter value (CMV). A strong and stable linear relationship could be identified between CMV and deflection of soil layer when water content of soil was consistent. (2) A theoretical analysis showed that the difference in 1/CMV at the same point could filter out the effect of underlying support on CMV and reflect the increase in compaction degree of the newly placed asphalt resurfacing layer. Based on the core test results, it is recommended that three IC parameters be selected for evaluating the compaction quality of the resurfacing project: the difference in 1/CMV, the starting surface temperature of compaction (>110℃), and the total number of passes (>2 passes). (3) Two specific cycle costs were developed based on costs for construction of a pavement and savings from improved compaction uniformity over the pavement lifecycle. The benefit-cost analysis indicated a nearly 50% reduction in construction costs for all four projects using IC. The increased service life resulting from using IC was determined based on increased compaction uniformity, which led to a significant annual cost saving for all projects.
状态：	Completed
资金：	154217
资助组织：	Tennessee Department of Transportation
执行机构：	University of Tennessee, Knoxville
开始时间：	20130530
预计完成日期：	20180814
主题领域：	Construction；Highways；Materials；Pavements