Investigating the performance of pervious concrete pavement to clogging control for urban runoff management

The main purpose of this research is to investigate the effect of increasing porosity on concrete porous pavement (PP) clogging control. The delay due to the clogging process has been observed in order to extend pavement service life and improve storm water management performance in long term. By adding pumice to the pervious concrete mix design, porosity and permeability increased; hence, additional porosity for the accumulation of suspended solids has been formed. The results showed that adding the pumice as part of the concrete aggregates produces positive effect on the initial permeability. Affected by clogging, permeability of the specimens in which pumice was added reduced only 26%, 10%, and 29%, showing that the procedure successfully delays clogging and extends service life of the PP. Although adding pumice reduces the compressive strength, it is still within the acceptable range. By comparison the observed data with the results of the permeability prediction models, it is demonstrated that the models properly predict permeability of the pavement over time, in more than 73% of the observed data and the results of the prediction models merely less than 10% difference observed. The rainfall-runoff simulation indicates that adding pumice as part of the permeable concrete aggregates results in delaying of the clogging and improving the performance of concrete increasing the service life of permeable pavements.