Forensic investigation into the performance of hot-mix asphalt

Abstract

The discussion in this paper is based on the outcome of a detailed forensic investigation on the performance of Hot-Mix Asphalt (HMA) on five road sections in the Gauteng province. The investigation forms part of a larger project to improve the rutting and fatigue behaviour of HMA wearing courses in South Africa. The findings of the forensic investigation were used, in conjunction with the outcomes of a state of the art survey, to define the scope of a multi-year HMA research programme currently in progress. Selection of the five sections was based on the results of a preliminary forensic investigation by Benoit Verhaeghe, for which the performance of a large number of HMA sections in the province was studied