Experimental Study on Mechanical and Hydrological Properties of Pervious Concrete with Different Water Cement Ratio

The aim of this research was to study the effect of various water-to-cement ratio on the properties of pervious concrete. Tests were carried out to find the optimum water-to-cement ratio that gives a high compressive strength with acceptable permeability. The tests of fresh density, compressive strength at 7days, porosity and water permeability for four mixes of pervious concrete with various water-to-cement ratio are investigated. A small single sized natural river aggregate ranged from (9.5 to 12.5mm) with aggregate cement ratio equal to (3.7) were used in the mixtures. The properties of pervious concrete such as compressive strength, fresh density, permeability and porosity are significantly affected by using different amount of water-to-cement ratio. The results indicates that the higher strength at 7 days is (17 Mpa) and acceptable water permeability can be achieved with optimum water cement ratio at (0.32). The results also showed that the water permeability of pervious concrete is primarily effected by porosity.