Performance of Coarse-Graded Mixes at Westrack - Premature Rutting

007891451998PDFTech ReportFHWA-RD-99-134Asphalt mixturesCoarse aggregatesConstructionHeavy duty trucksHot mix paving mixturesLoadsPavement performanceRuttingSuperpaveTest facilitiesNorth AmericaUnited States. Federal Highway AdministrationUnited States. Federal Highway AdministrationNTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATIONNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and PerformanceFederal Highway AdministrationWesTrack is the Federal Highway Administration's (FHWA) test facility in Nevada for developing performance-related specifications for hot-mix asphalt pavement construction. It is also providing some of the earliest data on the performance of Superpave asphalt mixture designs under high rates of heavy truck loading. When Superpave-designed test sections placed at the track in June 1997 had very rapid rutting failures, the highway community was concerned that the mixture design and construction procedures might be missing important, but unknown, constraints. A forensic team composed of academicians, asphalt industry representatives, and State highway agency engineers was assembled to study the early failures, and, if appropriate, to make recommendations for revising the Superpave procedures. This is their report