Application of Binder Bond Strength (BBS) Test as a Simple Method for Evaluation of Moisture-Induced Damage Potential in Asphalt Mixtures

December 12, 2019

Application of Binder Bond Strength (BBS) Test as a Simple Method for Evaluation of Moisture-Induced Damage Potential in Asphalt Mixtures

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Presented By: Dr. Rouzbeh Ghabchi

Abstract: Adhesion between asphalt binder and aggregates is known to significantly affect several important mechanical properties as well as performance and durability of Hot-Mix Asphalt (HMA). Moisture-induced damage is a result of insufficient bond between asphalt binder and aggregates in presence of moisture. In absence of a reliable and quick method for screening of mixes for their moisture-induced damage potential, using a simple and quick test method with a strong mechanistic basis is of critical importance. In this study sponsored by the Mountain-Plains Consortium, Binder Bond Strength (BBS) test was used to evaluate the tensile bond strength between different asphalt binders and aggregates. Also, different standard tests such as Tensile Strength Ratio (TSR) test used by the asphalt industry for evaluation of moisture-induced damage potential were conducted on different asphalt mixes and the results were compared with those obtained from the BBS tests.