Experimental Study on Mechanics and Permeability of Fly Ash Permeable Concrete

Abstract

In order to explore the effects of the changes of water-glue ratio, target porosity and fly ash content on the mechanics and permeability properties of permeable concrete after being mixed with fly ash, the compressive strength, flexural strength and permeability coefficient of permeable concrete with different water-cement ratios, target porosity and fly ash content were tested. The test results show that the increase of the water-glue ratio from 0.24 to 0.33 will improve the mechanical properties of permeable concrete but reduce its permeability, and after 0.33, it will reduce its mechanical and permeability properties at the same time; the increase of target porosity will enhance the permeability of permeable concrete and reduce its mechanical properties; the increase of fly ash content from 4% to 12% will improve the mechanical and permeability properties of permeable concrete at the same time, but only increase its permeability and reduce its mechanical properties after 12%.