不同掺和料透水混凝土透水系数与孔隙率的关系探讨

Discussion on the relationship between permeability coefficient and porosity of permeable concrete with different admixture

研究了不同掺量粉煤灰、矿粉、钢渣粉对透水混凝土透水系数和孔隙率的影响规律及它们之间的关系,对比了同条件下7d、28d混凝土的透水系数。试验结果表明:W/B=(0.2-0.32)条件下,加入掺和料后,透水混凝土的透水系数与孔隙率均有不同程度的降低。同等条件下透水系数与孔隙率不呈线性关系,但有很好的相关性,通过曲线拟合得到了不同掺和料对应的关系式。28d透水系数与7d透水系数相近,但28d透水系数略有降低。

Study different volume fly ash,slag steel slag and steel slag powder on porous concrete permeable coefficient and the influence of porosity and the relationships between them,compared with 7 d,28 d permeability coefficient of concrete under the conditions.Test results show that W/B=（0.2-0.32） condition,after joining the admixture,pervious concrete of steel slag water permeability coefficients and reduction in porosity and to a different degree.Porosity and permeability coefficient under the same conditions is not linear,but there is a good correlation,obtained by curve fitting the corresponding relation of different admixtures.28 d permeability coefficient and 7 d permeability coefficient is similar,but 28 d permeability coefficient decreases slightly.