掺粉煤灰对混凝土孔结构影响的试验研究

Experimental research on pore structure of concrete mixed with fly ash

采用压汞法和吸水动力学法测量了掺粉煤灰混凝土的亚微观孔结构参数,从粉煤灰种类、掺量及龄期三个方面对混凝土的孔结构的影响进行了研究分析,研究得出混凝土孔隙率随粉煤灰的细度和掺量的增加而减小,且随龄期的增长孔隙结构优化的速度大于基准混凝土的结论,为配制高强度高性能混凝土提供理论依据。

Mercury injection method and water absorption kinetics were used to measure sub - micro pore structure parameters of fly ash concrete, the effect of such three aspects as fly ash type ,content and age on concrete pore structure was studied and analyzed, it concluded that concrete porosity decreases with increase of fly ash fineness and content, further more,speed of pore structure optimization will be more than that of normal concrete with the growing age,and this offers theoretical basis for preparing high Strength and high performance concrete.