Effects of Inorganic Reinforcers on Strength and Permeability of Pervious Concrete
Cement-based pervious concrete was prepared respectively with quartz powder,fine sand and silica fume as inorganic reinforcers.The influence of different inorganic reinforcers to the compressive strength,effective porosity and permeability coefficient of pervious concrete was investigated.The results show that the compressive strength of pervious concrete can be improved by adding certain amount of the inorgan-ic reinforcing materials.In order to achieve the compressive strength of C25 and maintain good permeability,the content of quartz powder and fine sand should be 6%at least and 6%-8%of the total amount of coarse aggregate,and the content of silica fume should be 6%-10%of the total amount of cementitious material.Using the quadratic function equation,the permeability coefficient of pervious concrete can be ob-tained indirectly by measuring the effective porosity of pervious concrete.
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