| 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. |
| 关键词: 混合水泥 无水石膏 温度 钙矾石 水化 微结构 |
| DOI：10.3969/j.issn.1007 9629.2016.06.005 |
| 分类号: |
| 基金项目: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);高性能土木工程材料国家重点实验室开放基金;同济大学青年优秀人才培养行动计划 |
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| Influences of Curing Temperature on the Microstructure Evolution of Calcium Sulfoaluminate Cement Based Ternary Blends |
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XU Linglin, YANG Xiaojie, WANG Peiming, WU Kai
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Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China
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| Abstract: |
| 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 yeelimete 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. |
| Key words: blended cement anhydrite temperature ettringite hydration microstructure |
