Study on Photo-catalytic Efficiency and Durability of Nano-TiO2 in Permeable Concrete Pavement Structure

In terms of the problems of photo-catalytic degradation of exhaust gas, especially the low efficiency and short durability of NOx, an integrated loading method of fully reclaimed permeable concrete structure from the selection of photo-catalysts, aggregate infiltration and internal incorporation was designed and tested in this study. Through systematic tests, all those methods have fully improved the photo-catalytic oxidation effect, and the NO_x degradation efficiency can reach more than 80%. The realization of stereoscopic degradation of exhaust gas and the improvement of photo-catalytic durability provide a technological support for the application of nano-TiO₂ in the permeable concrete pavement structure. (paper)