Abstract
The pursuit of improving the special properties of modified asphalt using advanced nanomaterials and understanding its mechanism based on material properties is highly attractive topic. In this study, four types of MXene (Ti3C2Tx) (prepared by adjusting the synthesis methods) were incorporated into styrene–butadienestyrene (SBS) block copolymer modified asphalt as ultraviolet (UV) aging resistant modifiers. The UV aging behaviors, such as asphalt photo-oxidation and SBS copolymer degradation, were evaluated by simulating UV aging of modified asphalts using indoor equipment. The chemical and rheological results showed that MXene incorporated modified asphalts had excellent high-temperature performance and rutting resistance. Furthermore, MXene incorporation significantly inhibited asphalt oxidation and SBS copolymer degradation. The underlying mechanism of these intriguing properties was found to be the few-layered structure and -F, -O surface end groups of MXene, which were the key factors responsible for the enhanced anti-UV aging performance of modified asphalt.
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