Utilization of Fly Ash Aggregates in Pervious Concrete

Abstract

As most of the places were covered with impermeable surfaces like cement concrete and bitumen. This has a major impact on the ground water table. Pervious Concrete pavement is an effective ways to minimize this issue. Pervious concrete is an open graded structure with interconnected voids through which rain and storm water is permitted to percolate into the aquifer. In reviewing technology advances through the centuries it is evident that material development plays a key role. Considerable efforts are still being made in every part of the world to develop the new construction materials. Porous concrete is an innovative material which is a mixture of coarse aggregate (25%Fly ash Aggregates and 75% of Coarse Aggregates), cement, water and little amount of sand to no sand along with or without chemical admixtures, A laboratory experiment was conducted to evaluate the properties of porous concrete. This study on permeability and strength properties of porous concrete. Trail Mix was done on the W/C Ratio of 0.45 and cement of 414 kg/m^3 for M20 grade by reducing the percentage of Fine aggregates and replaced by Coarse Aggregates(CA:FA-30:70, 20:80, 10:90,0:100) and tested, As the cement slurry had settled down this caused obstruction to Permeability so the W/C Ratio of 0.375 and 0.35 are used with fixing cement of 400 kg/m3After the test we came to know that Permeability of 0.35 W/C ratio with 0:100 is having more permeability and W/C 0.375 with 20:80 ratio has more compressive strength. Porous concrete has wide range of applications so that it is applicable for-Sidewalks, pathways, parking lots, floors for green houses, noise barriers,and play grounds. Moreover it has several environmental benefits such as-allows groundwater to infiltrate into the ground to replenish groundwater aquifers, allows parking lots, Hence we can finally conclude that porous concrete is an environmental friendly .