The performance of asphalt cement in pavement mixes has aroused considerable interest and debate in the past few years. As a result of this, the Texas State Department of Highways and Public Transportation has sponsored studies to compare the performance of asphalt cement from different sources through a series of full-scale trials and associated laboratory studies. The laboratory studies include penetration and viscosity tests on the asphalt cement, from which temperature susceptibility parameters have been derived; mix parameters such as void content and resilient modulus; and state-of-the-art chromatography. The purpose of this paper is to make the results obtainedto date available to other researchers and to draw some tentative conclusions about the interrelationship among the various tests that have been performed.(A).
Abstract