Compared with Limestone and basalt, granite is a kind of obviously acidic stone with poor adhesion to asphalt, which seriously affects moisture damage resistance of granite asphalt pavement. This paper mainly studied the influence of TR-500S new anti-stripping agent on long-term moisture susceptibility of granite asphalt mixture and the interrelationship between asphalt, TR-500S and granite. The effects of TR-500S on the moisture stability of acid aggregate AC-20 asphalt mixture were evaluated by indirect tensile strength (ITS) test, accelerated aging test and Hamburg wheel tracking (HWT) test. The results showed that TR-500S anti-stripping agent could significantly improve the long-term moisture stability and high temperature stability of granite asphalt mixture than the control mixes and those containing hydrated lime, which could fully meet the requirements of heavy traffic. Finally, the interrelationship between asphalt with TR-500S and granite was characterized by FT-IR test. The results showed that TR-500S could make asphalt and granite to be chemically bonded to improve the adhesion of granite with asphalt mixed with the TR-500S.

CICTP