Effect Investigation of Ultraviolet Ageing on the Rheological Properties, Micro-Structure, and Chemical Composition of Asphalt Binder Modified by Modifying Polymer

In order to investigate the effect of nano polymer materials on UV aged performance asphalt binder, a PA modifying agent was selected prepare modified asphalt. Under radiation, rheological properties studied. With extension ageing time, microstructure variation characterized by using focused ion beam scanning electron microscope (FIB-SEM). The thermophysical were investigated thermogravimetric analysis (TG). Furthermore, functional group compositions dynamic FTIR. results showed that with modifier could mitigate radiation binder. achieve an increasing viscoelasticity during process. suppressed generation microcracks in surface microzone samples. promote thermal stability improvement binder when subjected radiation. carbonyl and sulfoxide groups inhibited period, which indicated induced reaction be postponed agent.