Abstract
In this study, the resistance of various RAP blended binders to permanent deformation was analyzed with consideration to the nonlinear response of asphalt binders. Multiple creep and recovery (MSCR) and repeated creep and recovery with multiple stress levels (RCRMS) were performed on the RAP blended binders at 64oC. For the binder used in this study, it was found that the linear viscoelasticity framework is sufficient to capture the MSCR results. However, the use of a nonlinear viscoelastic model was necessary to predict the response of the binders when subjected to the RCRMS protocol. The results highlight the advantages of using a nonlinear viscoelasticity framework instead of relying only on the non-recoverable creep compliance (Jnr) to evaluate the rutting resistance of asphalt binders.
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