Paper Details

Pervious concrete technology is a unique and effective means to meet growing environmental demands. Bycapturing rainwater and allowing it to seep into the ground, pervious concrete is instrumental in recharging groundwater,reducing storm water runoff and meeting Environmental Protection Agency (EPA) storm water regulations. In fact, theuse of pervious concrete is among the best management practices recommended by the EPA and by other agencies andgeotechnical engineers across the world, for the management of storm water runoff on a regional and local basis. Perviousconcrete is a composite material consisting of coarse aggregate, Portland cement, water and chemical admixtures. It islittle bit different from the conventional concrete in that it contains little to no fine aggregates. The coarse aggregateusually consists of a single size and is bonded together at its points of contact by a paste formed by the cement and water.The result is a concrete with a high percentage of interconnected voids that, when functioning correctly, permit the rapidpercolation of water through the concrete. The main objective of this project work is to study the strength of perviousconcrete. To determine an appropriate mix design of pervious concrete at which we can get the optimum strength andpermeability characteristics. In this project work, the effect of variation in quantity of a component (sand) in mix design ofpervious concrete on its strength is investigated. The goal is to achieve a maximum strength without inhabiting thepermeability characteristics of the pervious concrete. For the project study, three mixes were prepared i.e. Control Mix,Mix no 1 and Mix no 2 with varying sand percentage as 2.20 %, 0.0 % and 4.0 % respectively. The mix consisted of ½ inchdown coarse aggregate, ordinary Portland cement, fly ash and water. The mix also included admixtures including a highrange water reducer (HRWR) and hydration stabilizer. Cylinders and beams specimens were casted for this study. Perviousconcrete slab was also casted to perform the infiltration test of pervious concrete pavement. The results of compressiontest, flexure test and infiltration rate test of the three mixes were then compared to make conclusions about the researchstudy. The results of all the tests performed on the specimens casted for this project work study shows that with increasingthe sand percentage in the previous concrete mixes, the strength of the concrete increases but the permeability of theconcrete decreases.

Ijaz Ul Haq, Fawad Ahmad, “Experimental analysis of pervious concrete with high water reducer and fly ash for strength development”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 7, Issue 7, pp. 10-17, July 2020.