Fractional linear viscoelastic constitutive relations of anhydride-cured thermosetting rubber-like epoxy asphalt binders

Epoxy asphalt binders (EABs) are thought to be a prior choice for long-life paving materials for their excellent performances. To facilitate design of epoxy asphalt pavement structures, anhydrides-cured EABs' (AC-EABs') linear viscoelastic constitutive equations were studied. Results indicated that, for weak-crosslinking AC-EABs, the fractional 2S2P1D model degraded into simpler Huet-Sayegh (HS) model, thus, HS model was selected to describe the constitutive relations at all reduced frequencies. Moreover, with HS model and arc tangent function for the temperature dependence of AC-EABs, properties of their concretes could be mapped from those of AC-EABs based on empirical correlation between binders and concretes. (C) 2018 Elsevier Ltd. All rights reserved.