高掺量粉煤灰水泥的复合活化研究  

Study on Compound Activation of High Fly-Ash Cement

作　　者：万雪峰[1] 马保国[1] 李相国[1] 余小刚 向波涌 

机构地区：[1]武汉理工大学,硅酸盐材料工程教育部重点实验室,湖北武汉430070 [2]湖北华新水泥(仙桃)有限公司,湖北仙桃433000

出　　处：《水泥工程》2007年第4期27-29,41,共4页Cement Engineering

基　　金：湖北省科技攻关计划(2004AA103B01)

摘　　要：研究了机械活化和复合活化对粉煤灰水泥的粉体特性以及浆体的物理化学性能的影响。结果表明:(1)采用复合活化(加有自动污化剂A1一起粉磨)比单纯机械活化对粉煤灰水泥有更好的激发效果;在粉体勃氏比表面积保持不变的情况下,复合活化对磨机台时产量略有提高,水泥标准稠度用水量增大,凝结时间缩短,3d,28d强度分别提高了3.6MPa,6.9MPa,强度达到了42.5RP·F水泥的标准。(2)用SEM对粉煤灰水泥浆体分析表明,复合活化能促进粉煤灰参与水化,生成更多的水化产物。This paper presents influence of complex activation and mechanical activation on powder properties as well as physical and chemical performances of Portland fly-ash cement paste. Results indicate that complex activation has much better effect on fly-ash cement than simple mechanical activation at the same Blain specific surface area of powder, which includes enhancing output of mill slightly, increasing water requirement of normal consistency, decreasing setting time, improving compressive strength by 3.6 MPa, 6.9 MPa respectively at age of 3 d, 28 d, making fly-ash cement satisfying standard of 42.5R P.F. SEM images show that complex activation can accelerate hydration of fly ash, and generate still more hydrates.

关 键 词：粉煤灰水泥 活化 增强 

分 类 号：TQ172.44[化学工程—水泥工业]