蒸汽养护对赤泥基碱激发胶凝材料性能及微观结构的影响  

Effect of steam curing on properties and microstructure of red mud-based alkali-activated cementitious materials

作　　者：史迪[1] 叶家元[1] 张鹏[2] 张文生[1] 

机构地区：[1]中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京100024 [2]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《混凝土》2017年第10期87-89,92,共4页Concrete

基　　金：国家"863"计划课题(2012AA06A109);中国建筑材料科学研究总院青年科学基金项目(YA-535)

摘　　要：以烧结法赤泥为原料、水玻璃为激发剂制备碱激发胶凝材料,并对蒸汽养护(60℃)对赤泥基碱激发胶凝材料性能及产物、微观形貌的影响进行了研究。结果表明,蒸汽养护条件下,赤泥基碱激发胶凝材料的主要反应产物为C-S-H凝胶;蒸汽养护可促进赤泥基碱激发胶凝材料的水化反应,从而使基体结构更为致密,强度显著提高;经60℃蒸汽养护48 h的赤泥基碱激发砂浆,其3、28 d抗压强度可分别达到34.8、65.7 MPa。The red mud-based alkali-activated cementitious materials were synthesized with sintering red mud and liquid sodium sili- cate.The effects of steam curing （60℃ ） on properties, reaction products and morphology wore investigated.The results showed that the main products of red mud-based alkali-activated cementitious materials cured in the 60℃ steam wore C-S-H gels.The 60℃ steam curing was favorable to the hydration of red mud-based cementitious materials.As a result, the matrix density, as well as the mechanical strength wore increased.The compressive strengths of mortars cured in the 60℃ steam reached 34.8 MPa at 3 d and 65.7 MPa at 28 d, respectively.

关 键 词：蒸汽养护 赤泥 碱激发胶凝材料 反应产物 微观形貌 

分 类 号：TU528.064[建筑科学—建筑技术科学]