Influences of different stone powders on pervious concrete strength

This paper focuses on the effect of different types of stone powders as a partial replacement of coarse aggregate on the strength and porosity of pervious concrete. The used stones in this study were gathered from the foothill of Haibat–Sultan Mountain of Koya city located in Kurdistan region of Iraq. Four types of stones were used; mudstone, sandstone, marlstone, and limestone as 7% partial replacement of coarse aggregate. For all mixes, the same mix proportion of 1:4.5:0.4 by weight for cement, coarse aggregate, and water, respectively, was used. The test results have shown a noticeable decrease of porosity for all types of mixes, with an increase in the compressive and splitting tensile strength. The results displayed also the great role played by the fineness of stone filler in improving the strength of pervious concrete with acceptable porosity. Besides, they indicated that the sandstone and marlstone powders are effective filler in improving the strength of pervious concrete.