Development of an Asphalt Aging Procedure to Assess Long-Term Binder Performance
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Nine 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 (60C, 1 atm air), used to simulate road aging. PAV thin-film aging at 90C, 20 atm air for 32 hr best represented environmental room aging. Taylor & Francis Group, LLC.