养护环境及粉煤灰对水工混凝土导电性能影响研究

Effect of Different Curing Environment and Fly Ash on Conductivity of Hydraulic Concrete

为探究不同养护环境及粉煤灰对水工混凝土导电性能的影响,在混凝土试件内通过埋设片状电极的方式,测量养护期内不同养护环境下掺有粉煤灰的水工混凝土的电阻率,探究其导电性能与养护效果的关系.结果表明:养护环境湿度与混凝土导电性呈正相关,在掺有粉煤灰情况下可使混凝土电阻率呈线性变化,并基于电阻率变化率提出了一种判断混凝土养护效果的方法.

To study the effect of different curing environment and fly ash on the conductivity of hydraulic con- crete, this article adopts the test method that embedding plate electrode into concrete sample. The relation- ship between the conductivity and the curing effect of the hydraulic concrete is evaluated by measuring the re- sistivity in different curing conditions and different amount of fly ash. The results show that the greater the humidity of the curing environment, the stronger the conductivity of the concrete; and the optimal amount of fly ash can make the concrete to reach the similar conductivity and curing effect on the standard concrete. Based on the rate of resistivity, a method for determining the effect of concrete curing, is proposed.