Analysis of the Evaluation Indices from TSRST
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 10
Abstract
Because the thermal stress restrained specimen test (TSRST) is recommended by the Strategic Highway Research Program (SHRP) as a test method to evaluate low-temperature cracking resistance of asphalt mixtures, many studies have been carried out to investigate the performance of asphalt mixture with this test using fracture temperature as the indicator. However, few of them focus on discussing its reliability. In this paper, six kinds of asphalts mixtures are evaluated by TSRST, and it is found that the evaluation results obtained by the four indices are contradictory. It is also inferred from the results of each index coefficient of variation that fracture temperature and transition temperature are more stable when they are used to evaluate low-temperature performance of asphalt mixtures. Through the application of principal-component analysis (PCA) and the Boston Consulting Group’s matrix on the TSRST results, it is demonstrated that fracture temperature used as the indicator of low-temperature performance of asphalt mixture is reliable, and this conclusion is verified by gray relation analysis between the four indices from TSRST and bending-strain-energy density.
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Acknowledgments
The authors are grateful for the financial support from the National Natural Science Foundation of China (50808058), and many thanks should be given to Xue Zhongjun for his help.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 10 • October 2012
Pages: 1310 - 1316
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Mar 18, 2011
Accepted: Mar 5, 2012
Published online: Mar 7, 2012
Published in print: Oct 1, 2012
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