ABSTRACT
Viscosity is an important property during asphalt production and compaction. For a given mixing and compaction temperatures, asphalt binder properties can be evaluated based on its viscosity. This paper evaluates the effects of a surfactant-wax based warm additive on the activation energy and aging properties of conventional and polymer modified binders based on results obtained from the rotational viscosity test. The warm additive was blended into the binders ranging from 0 to 4% by mass of binder. The activation energy and aging index were calculated from the viscosity of unaged and short-term aged binders at typical road construction temperatures. The activation energy results showed that incorporation of the warm additive helped to reduce the thermal susceptibility of the binders. The aging index showed that additive content, binder type and test temperature exhibited significant effects on the aging process of asphalt binders.
