孔溶液的电导率与混凝土的电测渗透性

摘要

The chemicals and electric conductivity of pore solution have major effects on the permeability of concrete evaluated by electric method. Analysis of experiment results indicates that w/c ratio and replacement of fly-ash contributes to the variation of electric conductivity of concrete pore solution. Further research also shows that the electric conductivity of concrete pore solution correlates with the one of filtered concrete powder solution well with the linear correlation coefficient of 0.8550 when the concentration (mass ratio of powder to water) of filtered concrete powder solution remains at 3: 1. It is feasible to modify the electric measurement of concrete permeability by using electric conductivity of filtered concrete powder solution.%孔溶液的化学成分和电性能对混凝土渗透性的电测结果有重要影响.理论分析和试验表明,水灰比和粉煤灰的掺量对孔溶液的电导率影响很大.混凝土粉末浸液的电导率与孔溶液的电导率有良好的相关性,浓度为3:1的粉末浸液与孔溶液电导率的线性相关系数为0.8550.利用混凝土粉末浸液的电导率对混凝土的电测渗透性结果进行修正是可行的.