Light weight no-fines pervious concrete experimental study for water filteration.

The Planning Commission, Government of India has estimated the water demand increase from 710 BCM (Billion Cubic Meters) in 2010 to almost 1180 BCM in 2050 with domestic and industrial water consumption expected to increase almost 2.5 times. The trend of urbanization in India is exerting stress on civic authorities to provide basic requirement such as safe drinking water, sanitation and infrastructure. There is a need for finding alternative to the traditional rapid sand filters employed in various cities for filtration purpose. Presently sand is being used as the filtration media which is limited resource. This paper discusses the use pervious concrete with specific aggregates as filtration device. Twelve concrete mixes were used to identify an optimum mix for treating turbidity effectively using lightweight expanded clay aggregates (LECA) considering the properties of w/c ratio and size of LECA and finding their impact on density, Infiltration rate, void ratio and removal of turbidity. It was observed that lower w/c ratio of 0.35 gave a higher density. The void ratio, infiltration rateand turbidity removal for LECA of size 10 mm and w/c ratio 0.4 gave the optimum results. [ABSTRACT FROM AUTHOR]