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温度对铝酸盐水泥基三元体系早期水化的影响
作者:徐玲琳1  楠1 王培铭1  凯1 Horst-Michael Ludwig2 
单位:1. 先进土木工程材料教育部重点实验室 同济大学 上海 201804 中国 2. F.A. Finger-Institute for Building Materials Science  Bauhaus-Universit?t Weimar 99421 Weimar 德国 
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
出版年,卷(期):页码:2016,44(11):1552-1557
DOI:10.14062/j.issn.0454-5648.2016.11.02
摘要:

采用X射线衍射仪、环境扫描电子显微镜(背散射电子成像)、压汞仪分析了养护温度对铝酸盐水泥?硅酸盐水泥?无水石膏三元体系水化早期的水化相组成、抛光断面微观结构和孔结构等微结构演变的影响。结果表明:无论0 ℃还是40 ℃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;但养护温度越高,所生成的钙矾石越易向单硫型水化硫铝酸钙转变,且转变得越早,所得硬化浆体的最可几孔径越大。此外,40 ℃养护3 d后的浆体中还生成了水化钙铝黄长石和三水铝石。
 

The effect of curing temperature on the early hydration of calcium aluminate cement-Portland cement-anhydrite ternary blends was determined by calorimetry, X-ray diffraction, environmental scanning electronic microscopy (backscattered electron imaging) and mercury intrusion porosimetry, respectively. The related phase composition, microstructure of fracture surface and pore structure were investigated. The results reveal that the main hydration products are related to calcium sulphoaluminate based phases cured at 0 ℃ or 40 ℃. Increasing curing temperature results in a rapider conversion from ettringite to plate-like monosulfate and a greater amount of coarser pores. In addition, results in an extraordinary formation of straetlingite and aluminium hydroxide was observed in the case of the highest curing temperature (i.e., 40 ℃).
 

基金项目:
国家自然科学基金项目(51402216);先进土木工程材料教育 部重点实验室(同济大学)开放基金项目(201603);同济大学青 年优秀人才培养行动计划项目。
作者简介:
徐玲琳(1986—),女,博士。
参考文献:

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