铝酸盐水泥结合莫来石不定形浇注料耐高温性能研究  

Study on high temperature resistance of aluminate cement combined with mullite amorphous castable

作　　者：李宣霖 文华[1] 周锦程 雷旭 范伟 蒋李志鸿 LI Xuanlin;WEN Hua;ZHOU Jincheng;LEI Xu;FAN Wei;JIANG Lizhihong(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《新型建筑材料》2024年第8期112-116,122,共6页New Building Materials

基　　金：国家科技重大专项课题(2016ZX05040006-001-011);国家自然科学基金项目(51108393)。

摘　　要：采用不同类型的铝酸盐水泥与电熔莫来石制成莫来石不定形耐火浇注料,研究了在不同温度煅烧后的线变化率、显气孔率、体积密度、力学性能及荷重软化温度的变化,采用XRD、SEM及EDS对物相组成及微观形貌进行分析。结果表明,线变化率在不同温度煅烧后均呈收缩的趋势,显气孔率随煅烧温度升高不断增大,体积密度随煅烧温度升高先减小而后增大;莫来石质浇注料经不同高温煅烧后,其抗折强度随温度升高不断提高,抗压强度随温度升高不断降低;使用CA80水泥、CA70水泥制备的耐火浇注料荷重软化温度最高,分别为1462、1442℃。Amorphous refractory castable were prepared by using different types of aluminate cement and fused mullite,and the changes in linear change rate,apparent porosity,bulk density,mechanical properties and load softening temperature after calcination at different temperatures were studied.The phase composition and microstructure were analyzed by XRD,SEM and EDS.The results show that the rate of linear change shows a trend of shrinkage after different calcination temperatures,apparent porosity increases with increasing temperature,and the bulk density increases first and then decreases with increasing temperature.After being calcined at different high temperatures,the bending strength of mullite castable increases continuously with increasing temperature,while the compressive strength decreases continuously with increasing temperature.The softening temperatures of CA80 and CA70 samples under load were the highest,which were 1462℃and 1442℃respectively.

关 键 词：铝酸盐水泥 莫来石 不定形浇注料 荷重软化温度 

分 类 号：TU541[建筑科学—建筑技术科学]