高硅贝利特-硫铝酸盐水泥的热分析实验研究  

Thermoanalysis experimental study on rich-silica belite aluminosulphate cement

作　　者：张巨松[1] 李好新[1] 隋智通[2] 

机构地区：[1]沈阳建筑工程学院材料系,辽宁沈阳110015 [2]东北大学材冶学院,辽宁沈阳110006

出　　处：《沈阳建筑工程学院学报（自然科学版）》2003年第2期143-147,共5页Journal of Shenyang Architectural and Civil Engineering University(Nature Science)

基　　金：国家自然科学基金项目(59574021)

摘　　要：为了探明在1200℃左右烧制时高硅贝利特硫铝酸盐水泥其强度高于烧成温度更高这一特性的原因,在文献[1,2]XRD的分析基础上,笔者对石膏、铝酸钙、无水硫铝酸钙、硅酸二钙和铁铝酸四钙、高硅贝利特硫铝酸盐水泥进行了热分析,研究表明:当水泥的煅烧温度低于1200℃时,硅酸二钙和无水硫铝酸钙并没有大量生成,石膏的化合率仅为4%,因此强度很低.当温度超过1250℃时,石膏开始分解,石膏、无水硫铝酸钙和高硅贝利特水泥在1375℃的石膏分解率分别为8%、30 5%、26 68%,不利于无水硫铝酸钙的稳定存在,甚至可导致无水硫铝酸钙的分解,最终降低水泥的强度.Richsilica belite aluminosulphate cement burned in the temperature of 1?200℃ in rough has higher strength than that burned in higher temperature. In order to look into the causes of this phenomenon, thermoanalysis of CaSO3·2H2O, CA,C4A3,C2S,C4AF and richsilica belite aluminosulphate cement are done on the basis of XRD analysis of document［1,2］. When the burning temperature of cement is below 1?200℃,C2S and C4A3 is not formed in large quantity and chemical combination rate of gypsum is only 4%, therefore the strength of cement is low. When the burning temperature of cement is above 1?250℃, gypsum begins to decompose and the decomposing rate of CaSO3·2H2O,C4A3 and richsilica belite aluminosulphate cement is 8%, 305% and 2668% respectively, which is not beneficial to the stable existence of C4A3, and even leads to the decomposing of C4A3 and lowers the cement strength eventually.

关 键 词：高硅贝利特-硫铝酸盐水泥 差热分析 热重分析 烧成温度 实验研究 强度 

分 类 号：TQ172.727[化学工程—水泥工业]