Research progress of aggregate mechanics test methods

Abstract

Aggregate mechanical properties directly affect the structural performance of asphalt mixtures. Aggregates must be hard and wear-resistant, with the ability to resist disintegration to ensure good pavement performance. Appropriate and effective experimental evaluation methods of aggregate properties will contribute to a better understanding of material performance. This paper reviewed the literature on the applications of various types of aggregate mechanical test methods and analyzed the relationships among them. Aggregate degradation changes the aggregate gradation, and hence the volume characteristics of the asphalt mixture. Aggregate degradation in different compaction processes of asphalt mixtures during construction was described, and related influencing factors were analyzed. Finally, suggestions were made to overcome the deficiencies of the existing test methods and the problem of aggregate degradation.