A laboratory investigation into the effects of aggregate-related factors of critical VMA in asphalt paving mixtures.

794451640PDFTech ReportIDOT TR-415CTRE 98-20Asphalt mixturesAsphalt pavementsPaving materialsAggregatesAggregate mixturesLaboratory testsHot mix paving mixturesIowaIowa State University. Center for Transportation Research and EducationCoree, BrianHislop, Walter P.Iowa State University. Center for Transportation Research and EducationIowa. Dept. of TransportationIowa. Highway Research BoardNTL-HIGHWAY/ROAD TRANSPORTATION-DesignNTL-HIGHWAY/ROAD TRANSPORTATION-Construction and MaintenanceNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and PerformanceNTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsUS Transportation CollectionThis report summarizes research conducted at Iowa State University on behalf of the IowaDepartment of Transportation, focusing on the volumetric state of hot-mix asphalt (HMA)mixtures as they transition from stable to unstable configurations. This has traditionally beenaddressed during mix design by meeting a minimum voids in the mineral aggregate (VMA)requirement, based solely upon the nominal maximum aggregate size without regard to othersignificant aggregate-related properties. The goal was to expand the current specification toinclude additional aggregate properties, e.g., fineness modulus, percent crushed fine and coarseaggregate, and their interactions. The work was accomplished in three phases: a literature review,extensive laboratory testing, and statistical analysis of test results