塑性混凝土渗透性能室内试验研究

LABORATORY EXPERIMENTAL STUDY ON PERMEABILITY OF PLASTIC CONCRETE

目前众多学者对塑性混凝土的渗透性能进行了大量研究,但其渗透系数的测定方法不同,渗水高度的取值差异也较大,且尚不统一,文中欲通过相对渗透试验和土工渗透试验研究清楚塑性混凝土的渗透性能,渗透系数的测定方法和渗水高度的取值建议。结果表明塑性混凝土的相对渗透系数和渗水压力和渗透时间有一定关系,渗水高度的取值应以中间值为基准,取其(1±0.3)倍范围为有效值,取有效值的平均值计算其相对渗透系数,再以渗透系数的平均值作为该组塑性混凝土的相对渗透系数。研究为塑性混凝土渗透系数测定时的渗水高度选取方法提供了参考。

At present,a lot of research are carried out on the permeability of plastic concrete,but the method of measuring the permeability coefficient is not uniform,resulting in different value of the seepage height.The relative permeability tests and soil permeability tests are used to study the permeability of plastic concrete.The results show that the relative permeability coefficient of plastic concrete is related to the seepage pressure and seepage time.The value of seepage height should be based on the middle value,and the effective value should be taken as the range of1±0.3 times;the average of the effective value is taken to calculate the relative permeability coefficient,and the average of the permeability coefficient is taken as the relative permeability coefficient of the group of plastic concrete.The study may provide the reference for the selection of seepage height in the determination of permeability coefficient of plastic concrete.