Asphalt Cement Specifications and HMA Performanceby James S. Moulthrop, Univ of Texas at Austin, United States,
Abstract: The standard specifications generally used for hot mix asphalt (HMA) are those published by the American Society for Testing and Materials (ASTM) or the American Association of State Highway and Transportation officials (AASHTO). Physical property measurements are made to determine specification compliance with these standards. However, little is known or understood as to how physical properties relate to performance of asphalt cements. Current studies funded by the Strategic Highway Research Program (SHRP) are attempting to identify those meaningful characteristics of asphalt cement that relate to performance. This paper addresses the various specifications and focuses on those properties that are currently considered to be most important regarding performance.
Subject Headings: Material tests | Highways and roads | Asphalts | Cement | Asphalt pavements | Construction materials
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