Impact statement: This research utilizes advanced imaging technology in the selection of proper shaped and textured aggregates to build more durable and longer lasting asphalt concrete pavements.  

An aggregate image analysis device, the University of Illinois Aggregate Image Analyzer is used to automate determination of coarse aggregate size and shape properties, such as the gradation, angularity, flatness and elongation, surface texture, and the surface area. The impact of these imaging based shape and size indices on the performances of asphalt concrete mixes is investigated in this pooled fund study. The field rutting performances of the National Center for Asphalt Technology test track mixes are studied together with the laboratory rutting performances of asphalt mixes received from 8 participating States and the Federal Lands and Highways Division.