Comparison of Several Asphalt Design Methods

摘要

This laboratory study compared several methods of selecting the optimum asphaltcontent of surface mixes. Six surface mixes were tested using the 50-blow Marshall design, the 75-blow Marshall design, two brands of SHRP gyratory compactors, and the U.S. Army Corps of Engineers' gyratory testing machine (GTM) with the oil-filled and the air-filled rollers. The Georgia loaded wheel tester (GLWT) was also used in an attempt to define the maximum allowable asphalt content.