硅酸盐通报2018，Vol.37Issue(6)：2002-2007,6.
碱激发剂浓度及模数对碱矿渣胶凝材料抗压性能及水化产物的影响研究
Effect of Alkali Concentration and Modulus of Alkaline Activator on the Compressive Properties and Hydration Products of Alkali Activated Slag Cementitious Materials
摘要
Abstract
Granulated blast furnace slag was activated by using water glass (sodium hydroxide was added in to adjust modulus) to prepare alkali activated slag paste specimens.Effect of alkali concentrations of 4%, 6% and 8% and moduli of 0.75, 1.00, 1.50 and 2.00 of the activator on the compressive properties and hydration products of alkali activated slag was studied by using compressive strength test, X-ray diffraction (XRD) and thermal analysis (TG-DSC) techniques.The results show that when a lower modulus was used, such as 0.75 and 1.00, compressive strength of alkali activated slag decreased with the increase of alkali concentration.While when the modulus used was higher, such as 1.50 and 2.00, the specimens could obtain the maximum compressive strength when alkali concentration was 6%.Under same alkali concentration, modulus of 1.50 could make the specimens get the maximum compressive strength.The main hydration products of alkali activated slag was C-S-H gels, certain amount of C-A-S-H gels was also formed simultaneously.Besides, small amount of gismondine (CaAl2Si2O8· 4H2O) was also detected in the system.Hydrotalcite (Mg6Al2(OH)6CO3· 4H2O) was found in some of the mixes. Larger amount of C-S-H gels was formed in the alkali activated slag system with higher alkali concentration.Use of higher modulus, such as 1.50 and 2.00, was beneficial for the formation of C-S-H gels in the system.When a lower alkali concentration/modulus was used, the C-S-H gels in alkali activated slag was more crystalline.Compared to the degree of crystallinity, amount of C-S-H gels was more influenced on the compressive strength of such system.关键词
碱矿渣胶凝材料/碱浓度/模数/抗压强度/水化产物Key words
alkali activated slag cementitious material/alkali concentration/modulus/compressive strength/hydration product分类
建筑与水利引用本文复制引用
马倩敏,黄丽萍,牛治亮,郭荣鑫,颜峰,林志伟,杜海云..碱激发剂浓度及模数对碱矿渣胶凝材料抗压性能及水化产物的影响研究[J].硅酸盐通报,2018,37(6):2002-2007,6.基金项目
国家自然科学基金(51502121,11562010) （51502121,11562010）
昆明理工大学引进人才基金(KKSY201406112) （KKSY201406112）
昆明理工大学分析测试基金(2017M20162210057) （2017M20162210057）
