Oxidation hardening kinetics of the rheological function G'/('/G') in asphalts
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AbstractThe authors used 9 asphalts oxidized at various temperatures and pressures to determine the hardening kinetics for the DSR function, an easily measured and meaningful surrogate for 15C ductility that relates well to age-related binder deterioration. For each asphalt, there is a rapid initial period that slows to a constant rate period. This constant rate period can be represented by carbonyl formation (oxidation) rate times a hardening susceptibility (HS). For the DSR function and viscosity, the HS and initial jump were pressure-but not temperature-dependent. The DSR function initial jump was relatively higher than the viscosity initial jump. © 2011 Taylor & Francis Group, LLC.
SponsorsSupport for this work provided by the Texas Department of Transportation (TxDOT), Mr. Jerry Peterson, Project director, in cooperation with the Federal Highway Administration (FHWA), is greatly appreciate.
PublisherInforma UK Limited
JournalPetroleum Science and Technology