Effect of fine aggregate's surface texture on creep in asphaltic concrete

This report is concerned with the study of the effects of fine aggregate's surface texture on creep in asphaltic concrete mixtures. The "Time Index" method was applied to measure the degree of angularity and roughness of fine aggregates. The creep test method introduced by Shell Petroleum Company was studied and the review of literature appears to credit this method. A simple lever arm loading system was set up in a hot room with a temperature of 104 F. Variables of air void content, asphalt grade and content were studied in three different blends containing fine aggregates of low, medium and high surface texture indices. The creep test was easy to perform and during this study it showed to be a good reflectant of the influence of the effect of aggregate surface texture on plastic deformation of asphaltic concrete mixtures