Study on the Influence of Fly Ash on the Impermeability of Concrete
In order to analyze the correlation between fly ash content and concrete impermeability,the influences of fly ash content and curing age on compressive strength,porosity,seepage height,seepage pressure and chloride ion permeability coefficient of concrete were studied.The results show that the early compressive strength,water seepage height and chloride ion permeability coefficient of concrete decrease with the increase of fly ash content,and the water seepage pressure and porosity decrease with the increase of fly ash content.When the fly ash content is 25%,the compressive strength,porosity,seepage pressure,seepage height and chloride ion permeability coefficient of concrete are the best.For all types of concrete,the compressive strength,porosity,seepage pressure,seepage height and chloride ion permeability coefficient increase with the increase of curing age,and the change rate of the early performance is much higher than that of the late performance.
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