摘要
采用分析纯的化学原料,将高铝水泥中的惰性成分硅铝酸二钙(C2AS,又称钙铝黄长石)转化为水化活性良好的Q相,组成Q相-铝酸一钙(CA)-七铝酸十二钙(C12A7)水泥系统,并研究转变前后两系统的抗压强度.结果表明:高铝水泥系统中的C2AS,在加入MgO和系统补钙的条件下,经过高温煅烧能够转化为Q相,高铝水泥系统CA-二铝酸一钙(CA2)-C2AS变化为Q相-CA-C12A7.Q相-CA-C12A7的烧成温度为1 260～1 300℃,保温时间为30～60 min.组成为Q相-CA-C12A7水泥的抗压强度比组成为CA-CA2-C2AS的高,而且其后期强度持续发展.
With chemical raw material in analytically pure, the transformation of C2 AS to Q phase were investigated in high-alumina cement CA-CA2-C2 AS system. The compressive strength of the two system cements which were Q phase-CA-C12A7 and CA-CA2-C2 AS was studied respectively. Results show that C2 AS in high-alumina cement with CA-CA2-C2 AS system can be transformed into the Q phase when adding MgO and abundant CaO after calcined at high temperature. After the transformation, the CA-CA2-C2 AS system changes into the Q phase-CA-C12A7 system. The sintered temperature of the Q phase-CA-C2A17 system is 1260-1300°C for 30-60 min. The cement compressive strength of the Q phase-CA-C12A7 system is higher than that of the CA-CA2-C2 AS system.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2005年第4期462-466,共5页
Journal of The Chinese Ceramic Society
基金
武汉理工大学硅酸盐材料工程教育部重点实验室开放基金(SYSJJ2003 03)资助项目。
关键词
高铝水泥
Q相-铝酸一钙-七铝酸十二钙系统
烧成
抗压强度
Alumina
Calcination
Calcium compounds
Compressive strength
Magnesium compounds
Phase transitions
Scanning electron microscopy
Sintering
X ray diffraction analysis
