STUDY ON PERVIOUS CONCRETE

Most cities today are covered with impermeable areas. During heavy rains or floods, water flowing to the surface causes inconvenience to users. In areas with a poor drainage system, this leads to severe flooding in low areas. In this situation, it is important that the surface is permeable. This is just the surface of the permeable concrete. Permeable concrete should have more voids compared to conventional concrete, which is achieved by the small amount or absence of fine aggregates. The important feature of permeable concrete is its permeability. This property allows water to enter the concrete. However, there are very limited standards for measuring this property. In particular, there is still no clear laboratory test for measuring the permeability of permeable concrete. We measure the unique property of permeable concrete, i.e. its permeability, and also try to increase the strength of permeable concrete without affecting the percolation properties. Experiments were performed on blends of zero fine granules and water / cement ratios of 0.3 to 0.35. We also tested the properties for small amounts of sand, namely 5%, 10% and 15% of the total aggregates, to obtain the optimum water / cement ratio obtained in our tests. To test the permeability used, the soil is replaced with a concrete sample of suitable dimensions. For a fine zero aggregate it was observed that the percolation coefficient increases with decreasing water / cement ratio of 0.32, at which the resistance is also comparatively maximal. We therefore found that the optimum water / cement ratio for the permeable concrete mix was 0.32.