塑性混凝土防渗墙渗透系数影响因素分析

Analysis of Influencing Factors on Permeability Coefficient of Plastic Concrete Anti-seepage Wall

该文通过采用不同膨润土掺量、水胶比、砂率等研究各因素对塑性混凝土渗透系数的影响。并采用三种方法分别对塑性混凝土防渗墙进行渗透系数检测,比较不同试验方法之间的差异。结果表明:塑性混凝土的渗透系数随着水胶比的增大而增大,随膨润土掺量的增大而减小,砂率由70%增大到90%,渗透系数会有一定程度的增大。室内成型试件渗透系数均在10^(-9)cm/s的数量级,芯样和注水试验渗透系数均在10^(-8)cm/s的数量级,相差一个数量级。

The paper studies the influence of various factors on the permeability coefficient of plastic concrete by adopting different mixing amount of bentonite,water-binder and sand ratio,etc.Three methods are used to test the permeability coefficient of plastic concrete anti-seepage wall respectively,and the differences between different test methods are compared.The test results show that the permeability coefficient of plastic concrete increases with the increasing of the water-binder ratio,and decreases with the increasing of bentonite content;the sand rate increases from 70%to 90%,and the permeability coefficient will increase to a certain extent.The permeability coefficient of the indoor molding test-piece is in the order of magnitude of 10^(-9)cm/s,and that of core samples and water injection test is in the order of magnitude of 10^(-8)cm/s,with a difference of one order of magnitude.