养护温度对硫铝酸盐水泥基三元体系微结构演变的影响  

Influences of Curing Temperature on the Microstructure Evolution of Calcium Sulfoaluminate Cement Based Ternary Blends

作　　者：徐玲琳[1] 杨晓杰[1] 王培铭[1] 吴凯[1] 

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海201804

出　　处：《建筑材料学报》2016年第6期983-987,992,共6页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51402216;51308406);同济大学先进土木工程材料教育部重点实验室开放基金(201603);同济大学青年优秀人才培养行动计划;高性能土木工程材料国家重点实验室开放基金

摘　　要：采用X射线衍射(XRD)、扫描电镜(SEM)、压汞仪(MIP)分析了养护温度对硫铝酸盐水泥-硅酸盐水泥-无水石膏三元体系水化早期浆体物相组成、抛光断面结构、孔结构等微结构演变的影响.结果表明:无论在10,20℃还是在40℃下养护,三元体系的主要水化产物始终为水化硫铝酸钙类物相.养护温度越高,相同龄期时无水硫铝酸钙熟料的剩余量越低,而相应水化产物钙矾石的生成量越高,片状单硫型水化硫铝酸钙的生成时间越早、生成量越高;且所得硬化浆体的最可几孔径越大.Influences of curing temperature on the early microstructure evolution of calcium sulfoaluminate cement-Portland cement-anhydrite ternary blends were recorded by X-ray diffraction（XRD）, scanning electronic microscopy（SEM） and mercury intrusion porosimetry（MIP）. The related phase composition, microstructure of fracture surface and pore structure were systematically investigated. Results reveal that, cured at 10, 20 ℃ or 40 ℃ respectively, the main hydration products are firmly related to calcium sulfoaluminate-based phases. Additionally, higher temperature not only results in a faster consumption of ye＇elimete and a more rapid formation of ettringite and earlier formation of plate-like monosulfate, but also leads to coarser of critical pore size and thus lower compressive strength.

关 键 词：混合水泥 无水石膏 温度 钙矾石 水化 微结构 

分 类 号：TQ172.75[化学工程—水泥工业]