ABSTRACT
In view of the demand for ecological road projects, this research focuses on the filtration layer added in porous pavement. The material for a filtration layer is required to meet road sewage purification and bear the load of road conditions. The addition of a filtration layer in porous pavement could reduce the pollutants in roadway runoff, and protect ground water to be polluted. The water sample for treatment was prepared, and then the performances of different materials of the filtration layer and multi-material combination filtration layer were tested, respectively. The results showed that the concentration of pollutants in roadway runoff was apparently reduced when a filtration layer was added to the porous pavement, which suggests its promising effects in reducing groundwater pollution.
