TRB’s National Cooperative Highway Research Program (NCHRP) Research Results Digest 357: Test Methods and Specification Criteria for Mineral Filler Used in Hot-Mix Asphalt summarizes the key findings of a project that identified test methods for mineral filler that characterize its physical and chemical effects on the performance of mastics and hot-mix asphalt. The project also explored proposed specification criteria for mineral filler that help optimize hot-mix asphalt performance.
The contractor’s final report, which is summarized by NCHRP RRD 357, is available online.