沥青路面热反射涂层开发及耐久性能评价

Development and durability evaluation of thermal reflective coating for asphalt pavement

为开发高性能沥青路面热反射涂层,研究了功能填料配比对隔热性能的影响、粘结材料配比对粘结强度的影响以及功能填料掺量对隔热性能和粘结强度的影响,并在此基础上制备热反射涂层,对其耐久性能进行评价。结果表明:不同TiO_(2)和SiO_(2)质量比例下,随着TiO_(2)质量的增加,热反射涂层的隔热性能升高。相同固化剂掺量下,在增韧剂掺量为20%~30%时,粘结强度最大;相同增韧剂掺量下,当固化剂掺量为30%~40%时,粘结强度最大。随着功能填料掺量的增加,热反射涂层隔热性能升高,粘结强度先缓慢降低,后加速降低。根据各组分最佳配比制备热反射涂层,涂层磨耗率随磨耗次数的增加而升高,前期升高速率快;隔热性能随磨耗率的增大而线性减小;抗滑性能随磨耗次数的增加先迅速上升后缓慢下降。

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 coat⁃ing and evaluated its durability.The results show that,under different mass ratios of TiO_(2) and SiO_(2),the thermal insulation perfor⁃mance of the thermal reflective coating increases with the increase of TiO_(2) 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 perfor⁃mance decreases linearly with the increase of wear rate.With the increase of wear times,the skid resistance first increases rapidly and then decreases slowly.