从提高光催化材料性能出发，以锐钛型纳米TiO2作为光催化材料应用在沥青路面中。采用 A（将纳米TiO2均匀分散在沥青中，以沥青为载体） 和B （将纳米TiO2与矿粉均匀混合，以矿粉 为载体） 两种掺加方式将5%的纳米TiO2掺入到沥青混合料中，成型OGFC—10 车辙板试件进行 试验，确定最佳的掺加方式。研究不同掺量、光照强度对纳米TiO2光催化性能的影响，并对其路 用性能进行试验分析。结果表明：相比B方式，A方式下成型的试件其光催化降解汽车尾气的效 果更好，故选定A方式为纳米TiO2的后续试验研究的掺加方式；随着纳米TiO2掺量的不断增加， 试件对HC、CO和NO三种尾气成分的降解效果越来越好，从综合降解效果和经济性考虑，选定 5%为最佳掺量；纳米TiO2对尾气的降解效果随光照强度的增强越来越好；混合料的各项路用性能 随着纳米TiO2的掺入而变得更好，所以实际工程应用中不必考虑其对混合料路用性能的不利影响。

Starting from the improvement of the performance of the photocatalytic material, the anatase nano-TiO2 was used as the photocatalytic material in the asphalt pavement. The 5% of nano-TiO2 was mixed into the asphalt mixture by two kinds of ways called A(the nano-TiO2 was well dispersed in as⁃ phalt , and the asphalt was the carrier) and B(the nano-TiO2 and powder were evenly mixed, and the pow⁃ der was the carrier) to form the specimen of OGFC-10 rut board and test it, in order to confirm the best way of mixing. The influence of different dosage and light intensity on the photocatalysis performance of nano-TiO2 was studied, and its pavement performance was tested. The results show that: comparing with the method B, the specimen formed by method A has better effect on photocatalytic degradation of auto⁃ mobile tail gas, so method A is selected as the mixing mode in subsequent tests; along with the increase of the content of nano-TiO2, the degradation effect of three kinds of automobile tail gas(HC, CO, NO) are becoming better and better; considering the degradation effect and the economic benefit, 5% is selected as the best dosage of nano-TiO2; the degradation effect of nano-TiO2 on the tail gas are getting better with the increase of the intensity of illumination; all the indexes of pavement performance are getting bet⁃ ter with the mixing of nano-TiO2, therefore it is not necessary to consider the influence of nano-TiO2 on the pavement performance of mixture in the practical engineering application.