Effects of UV Aging on Physical Properties and Physicochemical Properties of ASA Polymer-Modified Asphalt

The purpose of this study was to characterize and evaluate the effects UV radiation on rheological physicochemical properties ASA polymer-modified asphalt. conventional (penetration, softening point, ductility, Brookfield viscosity) asphalt were tested. Based rheology, effect different irradiation times high-temperature performance systematically characterized, thermogravimetric analyzer (TGA) used analyze asphalt, micromorphological characteristics ASA-modified under characterized by scanning electron microscope (FIB-SEM). results show that polymer has a significant basic Compared with base stability modified decreased, low-temperature ductility improved. can effectively reduce aging ultraviolet inhibit generation microcracks. polymers improve thermal binders. During process, formation carbonyl sulfoxide groups inhibited, indicating delay