碱矿渣水泥基胶凝材料的碳化特征研究  

Carbonation Characteristics of Alkali-activated Slag Cementitious Materials

作　　者：何娟[1] 何俊红[2] 王宇斌[1] 

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055 [2]宝鸡文理学院数学系,宝鸡721013

出　　处：《硅酸盐通报》2015年第4期927-930,936,共5页Bulletin of the Chinese Ceramic Society

基　　金：陕西省教育厅自然科学专项项目(2013JK0923);陕西省自然科学基金资助项目(2013JQ6015);西安建筑科技大学科技基金项目(JC1311)

摘　　要：抗碳化性能是混凝土耐久性的重要方面。以水玻璃与氢氧化钠(Na OH)为碱组分,粒化高炉矿渣为胶凝材料,研究了碱矿渣水泥的抗碳化性能,并分析了碱矿渣水泥易于发生碳化的主要原因。结果表明:与硅酸盐水泥相比,碱矿渣砂浆的碳化程度较大,碳化未引起碱矿渣水泥石干燥收缩的增加。碱矿渣水泥基胶凝材料硬化体碳化程度较大的主要原因是其水化产物不存在Ca(OH)2、硬化体孔溶液的高碱性及较大的干燥收缩。Carbonation resistance is an important aspect of concrete durability. Alkali-activated slag cement activated by water glass and NaOH was prepared. Carbonation resistance of alkali-activated slag cement was studied and the main reason that alkali-activated slag cement is prone to carbonation was analyzed. The results show that carbonation depth of alkali-activated slag mortar is larger than that of Portland cement mortar when mix proportion is the same. Carbonation doesn＇t increase the shrinkage of alkali-activated slag cement stone. No Ca （OH）2 in hydration product, high alkalinity of pore solution and large drying shrinkage of hardened alkali-activated slag cement based cementitious materials are the main reason for its serious carbonation.

关 键 词：碱矿渣水泥 碳化特征 高碱性 

分 类 号：TU528[建筑科学—建筑技术科学]