Evaluation of compacted aggregate resistant test compared with the fine aggregate angularity standards

This paper describes the determination of fine aggregate angularity (FAA) characteristics of different mineralogical type and shape (both angular and round) of aggregates which were received from 14 different sources. The ASTM C1252 involving three different test methods (Methods A, B, and C) and the EN 933-6 were used to determine the FAA values. The compacted aggregate resistance (CAR) test was also conducted on the same group of fine aggregates with as received and standard gradation as well as on the aggregate blends (M0, M25, M50, M75, M100) to provide a more performance-based aggregate parameter. In this way, the CAR test and the FAA standard methods for evaluating the FAA characteristics of aggregates can be compared. Based on test results, four different dense graded HMA mixtures (S1, L1, L3, L7) having similar gradation and volumetric properties were prepared and tested in the LCPC wheel tracking device to determine their respective rutting properties. The results indicate that a relationship exists between the rutting and the CAR test results. However, among the FAA tests, ASTM C1252 results do not correlate well with rutting and CAR test results.