Physical and anti-aging characteristics of nano-TiO2/irganox 1010 composite modified asphalt

Asphalt aging is the main cause of fatigue failure from asphalt pavements, and it can be divided into thermaloxidative and ultraviolet (UV) aging. In this study, nano-TiO 2 /Irganox 1010 were added to neat asphalt to simultaneously improve the aging phenomenon of asphalt in a variety of complex conditions of asphalt. We then analyzed and discussed physical properties of nano-TiO 2 /Irganox 1010 modified asphalt composites. In addition, MSCR (Multiple Stress Creep Recovery) and DSR (Dynamic Shear Rheometer) rheological tests were performed on nano-TiO 2 /Irganox 1010 modified asphalt with different contents. Aging simulation of nano-TiO 2 /Irganox 1010 modified asphalt was conducted through the TFOT (The Thin Film Oven Test) and UV test, and microstructure of UV aging was analyzed through scanning electron microscopy. Data analysis showed that the nano-TiO 2 /Irganox 1010 increased softening point and reduced penetration (25 °C) and ductility (5 °C). The nano-TiO 2 /Irganox 1010 also improved the creep resistance and rheological properties of the composites. Finally, the analysis of test results under different conditions showed that the addition of nano-TiO 2 /Irganox 1010 significantly enhanced the ability of asphalt to deal with aging in a variety of complex environments.