Pervious cement concrete pavement is an innovative pavement system, which have the ability torndrain water and absorb traffic noise generated by tyre-pavement interaction. Its use in parkingrnlots, walkways and low traffic zone pavements has been promising in the past. The main featurernthat differentiates pervious cement concrete from any other mixes is, its large interconnectedrnpores measuring up to 35% of the total volume of concrete. Despite the effectiveness of thesernlarge interconnected pores to drain water and absorb noise, their negative effect on strength isrnsignificant. Therefore strength and permeability are of special properties that need to bernbalanced. rnWhether conventional dense graded concrete or pervious concrete, the structure of the aggregaternto cement matrix remains the same i.e. aggregate, hardened cement paste (hcp) and interfacialrntransition zone (ITZ) are the main components. ITZ is the weakest in the solid system ofrnpervious concrete and is a region where crack initiation and propagation occur with less energy.rnTherefore, a mechanism to increase the strength of ITZ i.e. which can be taken as the wholernconcrete system shall be devised. rnLittle research has been conducted that characterizes the performance of grounded pumice (GP)rnon pervious concrete. In this research, the performance of GP as OPC replacement isrninvestigated. The characterizations are done using compressive, splitting tensile strength,rnpermeability, hardened density and porosity tests. The experiment is designed by preparingrncontrol mix containing 100% OPC and the experimental mix that contains 5%, 10%, 15%, 20%,rn25% and 30% GP. Tests are conducted at the ages of 3,7,28 and 56 days. rnBased on the experimental investigations, GP has resulted an increase in compressive andrnsplitting tensile strength up to 11% and 26%, respectively. It is also found that, GP can partiallyrnreplace OPC up to 15%. The optimum replacement level both for strength and permeability isrnfound to be 5%. The ideal porosity that reconciles hydraulic conductivity and strength is found tornbe 17%. The high water demand by addition of GP has also been mitigated by proposingrnconsistency driven water demand for pervious concrete mixes containing GP.