硅酸盐学报2017，Vol.45Issue(8)：1080-1087,8.DOI:10.14062/j.issn.0454-5648.2017.08.05
养护条件对硅钙渣基碱激发胶凝材料性能、反应产物及微观结构的影响
Effects of Curing Condition on Properties, Reaction Products and Microstructure of Calcium Silicate Slag-based Alkali-activated Cementitious Materials
摘要
Abstract
The calcium silicate slag-based alkali-activated cementitious materials were synthesized and cured in moist air (MA),sealed air (SA),steam air (HA),respectively.The mechanical properties,reaction products and microstructure were investigated by X-ray diffraction,infrared spectroscopy,thermogravimetry analysis-differential scanning calorimetry,mercury intrusion porosimetry and scanning electron microscopy.The results show that the main reaction products under three curing conditions are calcium alumina silicate hydrate gels.The density and mechanical properties vary with curing conditions.The specimens cured in HA exhibitthe densest microstructure and optimum mechanical properties.As compared to MA,the content of reaction products in specimens cured in HA increases due to the promotion of elevated temperature,giving rise to the optimization of density and mechanical properties.When cured in SA,despite the fact that a higher temperature contributes to the alkali-activation,as well as the distribution shift of capillary pores to lower diameters,the decrease of inner relative humidity of specimens prevents the alkali-activation.As a result,it is difficult to increase the density and mechanical properties of specimens cured in SA.关键词
养护条件/硅钙渣/碱激发胶凝材料/产物/微观结构Key words
curing condition/calcium silicate slag/alkali-activated cementitious material/products/microstructure分类
化学化工引用本文复制引用
史迪,张文生,叶家元,孙俊民..养护条件对硅钙渣基碱激发胶凝材料性能、反应产物及微观结构的影响[J].硅酸盐学报,2017,45(8):1080-1087,8.基金项目
国家“863”计划(2012AA06A118) （2012AA06A118）
国家自然科学基金(51402279)资助项目. （51402279）
