粉煤灰混凝土碳化性能研究

Based on accelerated carbonation test, effect of replacing ratio of fly ash(0-50%),and the prediction model of carbonation depth is contrasted with the measured value. The results : the carbonation model based on fick principles and water-binder ratio, the mixed quantity of cementitious materials, the total amount of gelled material is relatively reliable. Beause the diffusion coefficient is obtained after carbonation, the prediction depth is more accurate when the carbonation last a long time.the depth of carbonation will be increase by the content of fly ash; when the fly ash content is less than 30%, the carbonation depth will be little influence; more than 30% is contrary.