Ultraviolet and PAV aging procedures influence on rheological characteristics of Sasobit/SBS modified binder containing titanium dioxide nanoparticles

Abstract

The objective of this study is to evaluate the rheological properties of styrene-butadiene-styrene and Sasobit modified asphalt binder blended with various contents (0%, 1%, 3% and 5%) of nano-titanium dioxide (TiO2) after Ultraviolet (UV) aging and PAV aging procedures. Rheological test results showed that nanoparticles generally had no effect on the complex modulus and phase angle of binders. UV aged binders showed better fatigue and cracking resistance than the PAV aged binders. Finally, compared to the control binder, the binder with nanoparticles had a higher fatigue resistance after UV aged, but worse fatigue resistance after PAV aged.