Relationship of Superpave Gyratory Compaction Properties of HMA Rutting Behavior

摘要

At the time the NCHRP Project 9-16 research was initiated, the Superpave mix design procedure did not include any testing to evaluate a design asphalt mixture for adequate resistance to permanent deformation. This gap in the Superpave mix design process was originally intended to be filled by the advanced performance tests and analyses developed during the Strategic Highway Research Program (SHRP). Unfortunately, the cost of purchasing a Superpave shear tester to validate asphalt mixture performance and the experience required to execute the tests and perform the associated analyses were prohibitive. Without performance-related tests, users became increasingly uncomfortable relying strictly on mixture volumetric properties and component material requirements. Consequently, many state agencies began using supplemental tests, such as loaded wheel tests, to complement the Superpave material selection and mix design process.