【摘要】 制备了TiO₂改性乳化沥青并对其雾封层室内净化效果和工程应用性进行测试。结果表明：在120 min内，喷洒量为0.3、0.4 kg/m²的纳米TiO₂乳化沥青雾封层对NO₂的降解率均大于60%；对汽车尾气中的CO、NO和碳氢化合物（HC）有明显的降解作用，喷洒量为0.3 kg/m²时降解效率更高，在前30 min内NO的降解率可达92.7%。在工程实例中，与原路面相比，雾封层后的路面空气污染物中颗粒物（PM2.5和PM10）、SO₂以及CO等气体浓度基本呈下降趋势，而O₃浓度则呈上升趋势，且每天的交通量和气温对降解效率影响较大。更多还原

【Abstract】 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.更多还原