混凝土孔径尺寸对其抗渗性的影响  

EFFECT OF APERTURE SIZE ON IMPERMEABILITY OF CONCRETE

作　　者：陈立军[1] 王永平[1] 尹新生[1] 张丹[1] 

机构地区：[1]吉林建筑工程学院,长春130021

出　　处：《硅酸盐学报》2005年第4期500-505,共6页Journal of The Chinese Ceramic Society

摘　　要：根据Darcy公式和Cantor方程,研究了混凝土孔径尺寸对其抗渗性的影响。重点探讨在不同水压力作用下,毛细孔半径对混凝土渗透速率和渗透深度的不同影响。指出用Darcy公式中的渗透系数反映混凝土抗渗性的不足及国家标准中混凝土抗渗等级确定方法的不足。混凝土中毛细孔半径越小,混凝土的抗渗性越差;非毛细孔和超微孔孔径越小,混凝土的抗渗性越好。同时,提出测试混凝土抗渗性的改进方法和提高混凝土抗渗性的两种途径。On the basis of the Darcy formula and the Cantor equation, the impact of the aperture size of concrete to its impermeability was discussed. The different influences of the capillary radius to the permeating speed and depth of concrete under different water pressure were investigated. The weaknesses of expressing the concrete impermeability by using the permeating coefficient in the Darcy formula was pointed out, and the deficiency of methods to determine the concrete impermeability in the National Standards was also demonstrated. The conclusion is that the smaller concrete capillary radius results in the worse impermeability, and the smaller non-capillary radius or super-tiny aperture in the concrete is, the better impermeability is obtained. In addition, an improved method to measure the concrete impermeability and two ways to increase this impermeability are presented.

关 键 词：混凝土 孔径尺寸 毛细孔半径 抗渗性 渗透系数 渗透速率 抗渗等级 临界渗透深度 

分 类 号：TU528[建筑科学—建筑技术科学]