多元水泥基材料氯离子固化性能研究  

BINDING PERFORMANCE OF CHLORIDE IN MULTI-COMPONENT CEMENT-BASED MATERIALS

作　　者：张涛[1] 耿健 ZHANG Tao;GENG Jian(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 311500,China;School of Civil Engineering and Architecture,Ningbo Technology University,Zhejiang Ningbo 315100,China)

机构地区：[1]浙江大学建筑工程学院,杭州311500 [2]浙大宁波理工学院土建学院,浙江宁波315100

出　　处：《低温建筑技术》2022年第9期1-5,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金资助项目(51778578);宁波市自然科学基金资助项目(2019A610392)。

摘　　要：以水泥、粉煤灰和矿粉三元材料为基础体系,分别研究了额外添加富铝偏高岭土、富硅硅灰和近惰性凝灰岩石粉四元水泥基材料体系的氯离子固化机理和性能。利用等温吸附平衡法研究表明,相对于三元水泥基材料体系,额外引入偏高岭土的四元体系通过化学固化氯离子形成的Friedel's salt含量增加,相应的通过物理吸附实现固化的氯离子含量降低;相比较而言,硅灰和岩石粉四元体系中的Friedel's salt含量均下降,即氯离子化学固化量降低,而硅灰四元体系中C-S-H凝胶含量显著增加,氯离子物理吸附量降低,凝灰岩石粉四元体系物理吸附量降低程度最大。Based on the ternary materials of cement,fly ash,and slag powder,the chloride binding mechanism and ability of the Quaternary cement-based material system with the addition of aluminum rich metakaolin,silicon rich silica fume,and inert tuff powder were studied respectively.The isothermal adsorption equilibrium method shows that the content of Friedel's salt formed by chemically binding chloride ions in the quaternary system with additional metakaolin increases,and the content of chloride ions achieved by physical adsorption decreases accordingly com⁃paring to the ternary cement-based material system.The content of Friedel's salt in the silica fume and tuff powder quaternary system decreased,that is,the chemical binding ability of chloride ions decreased,while the content of C-S-H gel in the silica fume quaternary system increased significantly.The physical adsorption amount of chloride ions decreased,and the physical adsorption amount of tuff powder quaternary system decreased the most.

关 键 词：多元水泥基材料 氯离子固化能力 XRD-Rietveld 定量分析 

分 类 号：TU528[建筑科学—建筑技术科学]