During the service of SBS modified asphalt, which is affected by interactions with heat, oxygen, light and traffic load, its road performance is degraded. Therefore, investigating its aging behavior is significant. This paper analyzes the influence factors of SBS modified asphalt aging, elaborates the evaluation indexes and methods of asphalt aging, and summarizes the thermo-oxidation aging mechanism and thermo-photo-oxidation aging mechanism for SBS modified asphalt. The results indicate that during the aging of SBS modified asphalt, asphalt components are aging themselves, meanwhile SBS is degraded, including transformation of light components into heavy components. Furthermore, improving the polymeric structure of SBS or blending stabilizers such as nanocomposites can effectively delay aging of SBS modified asphalt.

road engineering  /  SBS modified asphalt  /  aging mechanism