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原文传递 Validation of Contractor HMA Testing Data in the Materials Acceptance Process Phase II

题名：	Validation of Contractor HMA Testing Data in the Materials Acceptance Process Phase II
作者：	Carr, E. A.; Shuler, M. G.; Burati, J. L.
关键词：	Bridge (Structure)##South Carolina (State)##Real time measurements##Validation and verification##Specification limits##Risk assesment##Recommendation##Bridge engineering##Bridge construction##Verification testing##South Carolina Department of Corrections (SCDC)##
摘要：	This study conducted an analysis of the SCDOT HMA specification. A Research Steering Committee provided oversight of the process. The research process included extensive statistical analyses of test data supplied by SCDOT. A total of 2,789 AC tests, 2,234 AV tests, and 2,230 VMA tests were provided from 20 different projects, with some projects having multiple Mix Types and JMFs involved. A total of 2,010 density test results also were provided from 15 of the 20 projects. Relatively small amounts of data from certain Courses and Mix Types limited analyses only to Surface Type A and Surface Type B mixes. The analyses led to a recommendation that SCDOT switch to using the differences from the AC, AV, and VMA target values rather than the actual AC, AV, and VMA values. This will allow the possibility of combining test results from more than 1 JMF in the Lot payment decision. In addition, SCDOT verification test results were provided from 16 of the 20 projects. These data consisted of 487 AC and 452 AV and VMA test results from SCDOT. In addition, the data set included 411 AC, and 387 AV and VMA Contractor verification test results. These data were analyzed to evaluate current SCDOT verification procedures and issues concerning them were presented and discussed. Power curves were developed for various sample sizes for the F-test, the two-sample t-test, and the paired-sample t-test to allow SCDOT to evaluate the risks associated with their current verification procedures as well as any possible changes to the current procedures.
总页数：	331
报告类型：	科技报告