Porous Concrete Based on Granite and Limestone Waste: An Innovative Solution for Drainage Channel Base

Abstract

Drainage systems are crucial component of urban infrastructure, but development reduced infiltration areas and lowers drainage channel capacity due to sedimentation, rubbish and channel narrowing. Decreased drainage channel performance causes water to overflow the surface and cause inundation. This research introduces an innovative solution to enhance drainage channel performance by using porous concrete, which allows water to pass through its voids. This research aims to develop porous concrete by utilising granite and limestone waste. Waste granite and waste limestone have no selling value and can damage the environment. The research method uses experimental tests with variations in the mixture of waste as an added material. The mix variation is used to determine the optimal value of porous concrete permeability. Different variations of porous concrete mixtures: normal concrete, C1, C2, C3, C4. The results obtained found that concrete mix B4 with the largest variation of waste mixture. The speed of passing water with the comparison of normal concrete with C1, C2, C3 decreased. Normal concrete with C4 has an increase in speed of 10%. The findings of this study indicate that the larger the voids in the concrete, the greater the ability of water to escape. This paper provides a basis for further studies on flood mitigation in urban areas with reduced infiltration areas.