活化煤矸石/粉煤灰水泥水化过程及性能差异  

Hydration Process and Properties Difference of Activated Coal Gangue Cement and Fly Ash Cement

作　　者：刘贤萍[1] 王培铭[1] 

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海200092

出　　处：《建筑材料学报》2010年第3期371-375,共5页Journal of Building Materials

基　　金：国家重点基础研究发展规划(973计划)项目(2001CB610704;2009CB623104)

摘　　要：用水化热、热分析、化学结合水量、压汞法和扫描电镜研究了20℃养护条件下硅酸盐水泥和活化煤矸石/粉煤灰硅酸盐水泥的水化过程、硬化浆体孔结构和微观结构,并研究了浆体抗压强度和收缩值随龄期的发展规律.结果表明:与粉煤灰相比,活化煤矸石较大的比表面积及其所含有的多孔或致密的惰性物质,使其对水泥熟料水化的早期稀释效应有所削弱,也使其后期火山灰反应对水泥熟料和活化煤矸石混合材整体水化程度的提高幅度有所下降,并且活化煤矸石硅酸盐水泥水化1 a后其硬化浆体的毛细孔含量高于粉煤灰硅酸盐水泥,其抗压强度和收缩值则低于粉煤灰硅酸盐水泥.The hydration process,pore structure and microstructure of Portland cement and Portland cement blended with activated coal gangue or fly ash at 20 ℃ were studied by isothermal calorimeter,thermal analysis,chemically bound water determination,mercury intrusion porosimetry and scanning electron microscope.Compressive strength and shrinkage were also studied.The results show that the activated coal gangue with large specific surface area,porous and dense inert components weakens its early ＂dilution＂ effect to clinker hydration compared with fly ash.The increase of total hydration degree of clinker and activated coal gangue by later pozzuolanic reaction are also weaker than that of clinker and fly ash.The capillary content of activated coal gangue cement hydrated for 1 a are higher than that of fly ash cement,and the compressive strength and shrinkage of the former are lower than that of the latter.

关 键 词：水化 硅酸盐水泥 活化煤矸石 粉煤灰 

分 类 号：TQ172.12[化学工程—水泥工业]