Intensification of Pervious Concrete Strength Using Polypropylene Fibre With Varying Aggregate-Cement And Water-Cement Ratio

Although strength is not the only important requirement from a pervious concrete, but it is equally important as permeability characteristics for structural applications. Previous studies clearly specified that pervious concrete possesses lesser compressive strength than traditional concrete and is only capable of supporting light loadings and low volume traffic. In this dissertation, investigation is made on prior studies on the various properties of pervious concrete, with the main focus on compressive strength of pervious concrete. The several factor that has impeccable impact on compressive strength of concrete are water- cement ratio, aggregate-cement ratio, aggregate size, quantity of admixture and compaction. The results were compared to the results that have been obtained from laboratory experiments conducted on samples of pervious concrete cube prepared. The effectiveness of pervious concrete is due to the voids that reduces the strength considerably. Like for every 5% voids the compressive strength of 1% reduces (as per Klieger, 2003). The aim is to find a balance between water- aggregate and water- cement ratios in order to increase strength and permeability. So the conclusions of this research will be a recommendation as to the water-cement ratio, the aggregate-cement ratio, and aggregate size, quantity of admixture and compaction which is necessary to optimize compressive strength without having any detrimental effects on the permeability of the pervious concrete. Researches indicate that the minimum compressive strengths of acceptable mixtures reached in to 2.8 Mpa- and maximum compressive strength reached to 28 Mpa. As far as permeability is concerned extreme permeable rates were achieved in almost all the concrete mixes designed regardless of the compressive strength.