Pervious concrete is considered to be an advanced pavement material in terms of the\nenvironmental benefits arising from its basic featureââ?¬â?high water-permeability. This paper presents\nthe results of experimental work that is aimed at testing technically important properties of pervious\nconcrete prepared with three different water-to-cement ratios. The following properties of pervious\nconcrete were testedââ?¬â?compressive and splitting tensile strength, unit weight at dry conditions, void\ncontent, and permeability. The mix proportions were expected to have the same volume of cement\npaste, and, to obtain the same 20% void content for all of the samples. The results show that changes\nof water-to-cement ratio from 0.35 to 0.25 caused only slight differences in strength characteristics.\nArising tendency was found in the case of compressive strength and a decreasing tendency in the\ncase of splitting tensile strength. The hydraulic conductivity ranged from 10.2 mm/s to 7.5 mm/s.\nThe values of both the unit weight and void content were also analysed to compare the theoretical\n(calculated) values and real experiment results. A fairly good agreement was reached in the case of\nmixtures with 0.35 and 0.30 water-to-cement ratios, while minor differences were found in the case of\n0.25 ratio. Finally, a very tight correlation was found between void content, hydraulic conductivity,\nand compressive strength.
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