Research on deicing performance of asphalt mixture containing salt

In order to effectively evaluate the deicing performance of asphalt mixture containing salt and find out the deicing mechanism and effect of asphalt mixture containing salt, firstly the road performance of asphalt mixture containing salt was studied, then the system for testing adhesion between ice and asphalt mixture was developed, and the extreme fracture tensile and damage interface level were proposed to assess the adhesion between asphalt mixture and ice. The effect of grading types and temperature on adhesion was also studied. The deicing mechanism of asphalt mixture containing salt was studied with the freezing point test. The deicing effect of asphalt mixture containing salt was verified by indoor test and outdoor actual project. The results show that asphalt mixture containing salt can effectively decrease the adhesion between ice and mixture and the extreme fracture tensile of mixture containing salt is 27. 8% lower than that of ordinary mixture at -5°C; the open gradation asphalt mixture has better adhesion with ice than the dense gradation, and the adhesion ability increases with the increase of the nominal maximum aggregate size, or the decrease of the temperature, and the interface level decreases with the decrease of temperature; the road performance and deicing performance of asphalt pavement containing salt are good.