Abstract:
In order to study the infiltration and purification effects of different types of permeable pavement on runoff and rainwater,this paper designs three permeable concrete pavement systems(PCPS)with different structures by using recycled aggregate of construction waste,namely recycled brick aggregate permeable concrete pavement system(PCPS1),recycled concrete aggregate permeable concrete pavement system(PCPS2) and ordinary permeable concrete pavement system(PCPS0). The rainwater infiltration capacity and the purification capacity of typical pollutant SS,COD,TP and TN are tested under different rainfall return periods and pollutant concentrations. The results show that the infiltration and purification capacity of PCPS decreases with the increase in rainfall return period and pollutant concentration;the PCPS1 has the best purification capacity of pollutant SS,COD and TN,the maximum purification rates are 98.95%,56.31% and 34.11% respectively,and the PCPS2 has the best infiltration capacity and purification capacity of pollutant TP,the maximum purification rate is 76.50%. Recycled aggregate PCPS has high internal porosity,and the attachments carried on the surface have adsorption function,which has good infiltration capacity and purification effect on runoff and rainwater,which provides a good way for the reuse of construction waste in the future.