关键词: 蒸汽养护;复合胶凝材料;水泥;水化产物

Abstract: The properties and hydration characteristics of cement mixed with slag and fly ash composite on the condition of high temperature steam curing were studied by using XRD , SEM, DSC and other test methods.The results show that the hydration products under the steam curing condition at 85 ℃ are basically the same as normal curing condition at 20 ℃, while the amount of hydration products is higher than the latter , and metastable hydrated calcium silicate and ettringite existed .The proper proportion of secondary cementitious material made the cement stone structure more compact and the strength of cement stone under steam curing condition is higher .Mixed with a little silica fume , the structure of cement stone is optimized , and strength of cement under steam curing condition is promoted .

Key words: steam curing;composite cementitious material;cement;hydration product