Performance of Gravel Aggregates in Superpave Mixes with 100/95 Angularity

摘要

The research conducted in this study evaluated the asphalt mixture performance of various gravels and crushed stone sources consisting of different levels of crushed face counts, as determined by ASTM D5821. Along with ASTM D5821, two additional aggregate angularity tests were conducted to evaluate the angularity and texture of the course aggregates: (1) AASHTO T326, Uncompacted Void Content of Coarse Aggregates, and (2) Aggregate Imaging System (AIMS). Each of the asphalt mixtures designed and tested during the study used three different asphalt binders: (1) Net PG64-22, (2) Polymer Modified PG64-22 meeting NYSDOT Elastic Recovery specifications (called PG64-22 ER), and (3) Polymer Modified PG76-22. The permanent deformation properties of the different asphalt mixtures using the Asphalt Pavement Analyzer (AASHTO TP63) and the Asphalt Mixture Performance Tester, AMPT (AASHTO TP79) with confining pressure applied to the specimens.