关键词: 铝酸盐水泥;硅酸盐水泥;粉煤灰;耐热性能

Abstract: Fly ash as mineral admixture was added into aluminate cement and portland cement respectively.With the aid of mechanical property test,X-ray diffraction (XRD) and scanning electron microscope (SEM) analyses,the effect of fly ash on the heat-resistant property of aluminate cement and Portland cement under 750 ℃ was investigated.The results show that fly ash don't react with aluminate cement and cant enhance the heat-resistant property of aluminate cement.Fly ash could enhance heat-resistant property of portland cement,and residual strength of cement stone after high temperature calcination is improved with the increasing of the content of fly ash below 40％.By the comparison,the heat-resistant property of fly ash-portland cement is better than that of fly ash-aluminate cement.

Key words: aluminate cement;portland cement;fly ash;heat-resistant property