Evaluation of the Effect of Crumb Rubber Properties on the Performance of Asphalt Binder

Abstract

The purpose of the research was to determine the most influential factors of crumb rubber that affect the performance characteristics of crumb rubber modified binder. The first phase of the study required the characterization of crumb rubber products used for asphalt binder modification. The second phase of the study consisted of asphalt binder modification and quantification of the influence of crumb rubber properties through performance testing of the binder. The third phase of the study investigated strategies to reduce the separation tendency of crumb rubber modified binder. The study shows that asphalt binder is influenced by rubber content and the mean particle size of crumb rubber modifier. The study concluded that mean particle size is the most influential crumb rubber property characterizing modified asphalt binder separation tendency.