Development and durability evaluation of thermal reflective coating for asphalt pavement.

In order to develop high performance thermal reflective coating for asphalt pavement, this paper studied the effect of the ratio of functional fillers on thermal insulation performance, the effect of the ratio of binder materials on bond strength and the effect of the content of functional fillers on thermal insulation performance and bond strength, and then prepared the thermal reflective coating and evaluated its durability. The results show that, under different mass ratios of TiO₂ and SiO₂, the thermal insulation performance of the thermal reflective coating increases with the increase of TiO₂ mass ratio. Under the same dosage of curing agent, the maximum bond strength is obtained when the dosage of toughening agent is 20%-30%. With the same amount of toughening agent, the maximum bond strength is obtained when the amount of curing agent is 30%-40%. With the increase of the content of functional fillers, the thermal insulation performance of the thermal reflective coating increases, and the bond strength decreases slowly at first and then rapidly. The thermal reflective coating was prepared according to the optimum ratio of each component. The wear rate of the coating increases with the increase of wear times, and the increase rate is fast in the early stage. The thermal insulation performance decreases linearly with the increase of wear rate. With the increase of wear times, the skid resistance first increases rapidly and then decreases slowly. [ABSTRACT FROM AUTHOR]