Influence of warm mix additives on viscosity and coating properties of asphalt binders modified with crumb rubber



In the present research four types of Warm Mix Asphalt (WMA) additives are investigated with the aim of identifying the most appropriate additive for improving Crumb Rubber Modified Binders (CRMBs) in terms of viscosity and coating properties. Viscosity tests are performed on the CRMBs with Dynamic Shear Rheometer and Rotational
Viscosimeter, while the binder aggregate affinity is then evaluated. The experimental findings indicate that wax results in a larger reduction of viscosity for CRMBs together with good workability at significantly lower production temperatures. In addition, no CRMB modified with WMA additives shows moisture damage potential.

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