Methods for Evaluating Asphalt Mix Compositions Containing Reclaimed Asphalt
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United States of America Patent
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Jun 22, 2017
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Jun 22, 2016
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Compositions including reclaimed asphalt may be optimized for performance that is comparable with asphalt compositions that do not contain any reclaimed asphalt. In a method to determine an optimal level of reclaimed asphalt for use with at least a rejuvenator, TSRST tests are carried out on test asphalt compositions with varying levels of reclaimed asphalt (RA) materials to obtain failure temperature and failure stress data for all compositions. The test results are compared to identify composition(s) with optimal amount of RA. The optimal asphalt composition containing the maximum amount of RA for comparable performance may have a failure temperature within±5% of the failure temperature of the reference composition, and a failure stress that may be equal to or greater than the failure stress of the reference composition.
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