Guidelines for Project Selection and Materials Sampling, Conditioning, and Testing in WMA Research Studies

This digest summarizes the results of a workshop held on May 13, 2011 in Irvine, California, to coordinate key warm mix asphalt (WMA) research projects. The results of the workshop are presented in tables which contain a proposed core set of criteria, methods, and protocols, including the following: field project selection criteria (Table 1); specimen preparation methods (Table 2); conditioning methods for laboratory-mixed, laboratory-compacted (LMLC) specimens, plant-mixed, laboratory-compacted (PMLC) specimens, and plant-mixed, field-compacted (PMFC) specimens (Table 3); performance test methods for LMLC, PMLC, and PMFC specimens (Table 4, Table 5, Table 6, and Table 7); and binder and aggregate test methods (Table 8).