ABSTRACT
Air pollution has been a serious problem in China. Automobile exhaust gas is an important source. Titanium dioxide (TiO2) has been long used as photocatalyst against exhaust gas. One key problem lies in how to integrate it on pavement. In this paper, we studied solutions of carrying nanoparticles of TiO2 on the surface of pavement for an active degradation of exhaust gases. Epoxy resin was selected as the matrix material. An epoxy resin fog seal and an epoxy resin gravel thin layer topping were designed. The mechanical performance and exhaust gas degrading effect of these materials were studied. A test section of was built on a cement concrete pavement within a toll station. The concentration of exhaust gas in the toll zone was tested before and after the treatment. The solution turned out to effectively reduce the exhaust gas level and was strongly recommended for similar projects.
