Preparation and performance of antifreeze adhesive materials for asphalt pavement

A new type of environmentally-friendly Anti-Freeze Filler (AFF) was prepared in this work firstly. The main components of the AFF included in carrier, deicing chemicals and surface modifier. Additionally, a corrosion retardant was employed to mitigate the impact on the environment. Various characterization methods were used to optimize the proportion of each component in the AFF, including ice-melting test, penetration test, corrosion test, specific surface area test and scanning electron microscope test. The anti-freeze asphalt concrete (AFAC) was prepared with AFF, and its engineered performance was tested. The results of engineered performance test indicated that both high-temperature and low-temperature performances of AFAC decreased with the increase of the AFF content, but still met the specification requirements. The AFAC had better water stability, when the replacement rate of filler is less than 75%. The ice-adhesion pulling/shearing tests indicated that the pulling and shearing strength of the AFAC was about 50% lower than that of the controlled sample within the test temperature of 0～ −10 ℃. An environment-induced deterioration of AFAC’s anti-freezing ability was evaluated with an environment simulation platform based on the climate conditions in central China. With the environmental deterioration came to the fifth cycle, the pulling strength of the AFAC was still 25% lower than the controlled specimen at −3 ℃.