Study on purification performance of nano-TiO2 emulsified asphalt fog seal layer
In this paper,TiO2 modified emulsified asphalt was prepared and its indoor purification effect on the fog seal layer and engineering application were tested.The results showed that the degradation rate of NO2 of nano-TiO2 emulsified asphalt fog seal layer with spraying amount of 0.3 kg/m2 and 0.4 kg/m2 could reach more than 60％within 120 min.It has obvious degradation effect on CO,NO and HC in automobile exhaust.When the spraying amount is 0.3 kg/m2,the degradation efficiency is higher,and the degradation rate of NO can reach 92.7％in the first 30 min.In the engineering example,compared with the original pavement,the air pollutants in the pavement after the fog sealing layer,such as particulate matter(PM2.5 and PM10),SO2 and CO,showed a basic downward trend,while ozone showed an upward trend,and the daily traffic volume and temperature also had a great impact on the degradation efficiency.
nano-TiO2photocatalysisfog seal layerengineering application
万方数据
