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Effect Of Fine Aggregate Angularity On Asphalt Mixture Performance, Chih-Jen Lee, Thomas D. White, Terry R. West
Effect Of Fine Aggregate Angularity On Asphalt Mixture Performance, Chih-Jen Lee, Thomas D. White, Terry R. West
JTRP Technical Reports
Superpave aggregate qualification includes the fine aggregate angularity (FAA). Fine aggregate angularity levels used in the Superpave system are below 40, 40 to 45 and above 45. The higher values are specified for layers near the surface and for higher traffic levels. The objective of this study was to address the effect of fine aggregate angularity on asphalt mixture rutting performance. A total of 18 mixtures were designed according to the Superpave volumetric design criteria. A surface mixture utilizing a partially crushed 9.5mm coarse aggregate and a single PG 64-22 binder were utilized. The poor quality coarse aggregate was used …