高掺CFB超细粉煤灰对水泥强度的影响研究  

Effect of Ultrafine Fly Ash on Strength Properties of Cement

作　　者：邱瑞芳 刘红宇[3] 薛芳斌 刘宏 

机构地区：[1]山西大学资源与环境工程研究所国家环保部煤系固废资源综合利用重点实验室,太原030006 [2]山西大学环境与资源学院,太原030006 [3]山西大学土木工程系,太原030013

出　　处：《电力学报》2017年第5期421-425,438,共6页Journal of Electric Power

基　　金：山西省煤基重点科技攻关项目(MC2014-04)

摘　　要：采用循环流化床锅炉低热值煤燃烧时产生的粉煤灰,并经蒸汽动能磨粉磨制得的超细粉煤灰为主要原材料,研究高掺量超细粉煤灰对水泥强度的影响,并通过SEM、XRD分析对水泥水化性能的影响机理。结果表明,超细粉煤灰具有较强的活性效应,掺加量为67%、77%和87%时,水泥胶砂试样的强度即可分别达到《通用硅酸盐水泥》GB175—2007对P·F52.5、P·F42.5和P·F32.5水泥的强度指标要求;而且,超细粉煤灰可促进水泥水化物的形成及其结构致密性。在水泥生产中合理的掺入超细粉煤灰,既可降低产品成本,也有利于节约资源、保护环境。To characterize roles of high additive volume ultrafine fly ash （U-FA） on strength properties of cement,the fly ash as the raw material,are ultrafined by out of circulating fluidized bed. Furthermore, effect of hydration capacity on cement by U-FA was investigated by X-ray diffraction analysis and scanning electron. The results indicate that U-FA has good activity property;and strength of cement mortar were respectively satisfied to Chinese national standard of P · F52.5, P · F42.5 and P · F32.5 cement when U-FA addictive volume were 67% ,77% and 82%. U-FA promotes formation of cement-hydrate and made it compact structure. It can decrease production cost and be beneficial to save resource and protect environment when the reasonable addictive volume of U-FA in cement production.

关 键 词：循环流化床 超细粉煤灰 水泥 强度 

分 类 号：TU528[建筑科学—建筑技术科学]