粉煤灰复合水泥对改善混凝土性能的试验研究

Experimental Research on Composite Portland Cement with Fly Ash to Improve Concrete Performance

复合水泥对混凝土性能的影响,尤其是耐久性能的影响,一直是人们普遍关心的问题.通过混凝土抗压强度试验和混凝土耐久性加速试验,对以粉煤灰作为主要混合材的复合水泥配制的混凝土的综合性能进行了研究.研究表明,复合水泥基混凝土3 d,28 d强度大于粉煤灰混凝土,和同强度等级的普通硅酸盐水泥基混凝土较为接近,而抗氯离子渗透性能则明显优于普通水泥基混凝土和粉煤灰混凝土.用粉煤灰作为主要混合材的高性能复合水泥来配制混凝土,是改善混凝土综合性能的非常有效的方法.

The effects of composite portland cement on concrete performance, particularly durability, always attract great attention. The comprehensive performance of composite portland cement concrete was studied by compressive strength test and durability accelerated tests. The test results indicate that 3 d and 28 d strength of the composite portland cement concrete is greater than that of the fly ash concrete. It is close to that of normal concrete. But the composite portland cement concrete has better penetrability resistance ability than the fly ash concrete and normal concrete. Therefore, the composite portland cement with fly ash can improve the comprehensive performance of concrete.