Evaluation of Superpave Gyratory Compaction of Hot Mix Asphalt

摘要

This study was carried out to evaluate the effect of restricted zone on volumetric properties of mixes consisting of all crushed, and all crushed and partially uncrushed materials. Mix designs were conducted with the Superpave gyratory compactor for two types of aggregate blends: one with all crushed granite and another with crushed granite and 20 percent natural sand. Three gradations for each type of aggregate blend consisted of gradations passing above, through, and below the restricted zone. For a given aggregate blend, gradations below or above the restricted zone provided higher VMA than mixes through the restricted zone. Mixes with crushed aggregate provided higher VMA than mixes with partially crushed aggregate.