Development of an asphalt aging procedure to assess long-term binder performance
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AbstractNine asphalts, including seven Strategic Highway Research Program asphalts and two Texas asphalts, were aged at several conditions of temperature and oxygen pressure to develop an aging test. Values for a dynamic shear rheometer function, a combination of both elastic and viscous properties that serves as an indicator of susceptibility to age-related pavement cracking, were measured for both aged and unaged samples. Each aging condition was ranked and calibrated against environmental room aging (60°C, 1 atm air), used to simulate road aging. PAV thin-film aging at 90°C, 20 atm air for 32 hr best represented environmental room aging. © Taylor & Francis Group, LLC.
SponsorsSupport for this work by the Texas Department of Transportation (TxDOT), Mr. Jerry Peterson, Project Director, in cooperation with the Federal Highway Administration (FHWA), is greatly appreciated.
PublisherInforma UK Limited
JournalPetroleum Science and Technology