Mitigation of Flooding & Improvement of Ground Water Table Using Permeable Concrete

Abstract

Pervious concrete (no-fines concrete) is a concrete containing little or no fine aggregate; it consists of coarse aggregate and cement paste. It consumes less raw material than normal concrete (no sand), it provide direct drainage of rainwater, it helps recharge groundwater in pavement applications. The previous studies gives an important idea about the pervious concrete about its mixing and installation processes it also concludes that pervious concrete has a large open pore structure hence less heat storage. In our project work we adopt trial mixes which gives M20 grade concrete. Coarse aggregate with nominal size 20mm passed and 10mm retained. Fine particals are replaced by 32% of river sand. Use of river sand in small amount helps to improve strength as well as maintain the void ratio in required percentage. Main goal of our project is to achieve the maximum strength with proper drainage properties. The mix without river sand and using small aggregate give fine void ratio and compressive strength is more than the mix using large size aggregate. The concrete mix with 32% of river sand gives void ratio within permissible limit (15% - 25%) and also improves the compressive strength as compare to previous mix. Hence from this study we have concluded that use of river sand gives improves the strength without lowering the void ratio.