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Influence of water removal techniques on the composition and microstructure of hardened calcium sulfoaluminate cement pastes

机译：水去除技术对硬化钙硫化钙水泥浆料组成和微观结构的影响

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摘要

Influence of different drying techniques, namely, vacuum drying, oven drying (40 °C) and D-drying on the composition and microstructure of the calcium sulfoaluminate (CSA) cement was investigated in this study. The vacuum drying and oven drying were performed after the samples were immersed in acetone or ethanol. The results show that D-drying decomposes ettringite (AFt) greatly. Following solvent replacement, oven drying slightly decomposes AFt when compared with the vacuum dried sample, possibly due to the carbonation of AFt in the oven drying process. The decomposition of AFt due to D-drying and oven drying affects both the compositional and microstructural analysis of CSA hydrates. In addition, the soaking time of the samples in the solvents has no effect on the thermogravic (TG) analysis of the hydration products of CSA cement, which indicates that the CSA cement hydrates have no interaction with the solvents.
机译：在本研究中研究了不同干燥技术，即真空干燥，烘箱干燥，烘箱干燥（40℃）和D-干燥对磺钠（CSA）水泥的组成和微观结构的影响。在将样品浸入丙酮或乙醇中后进行真空干燥和烘箱干燥。结果表明，D型干燥大大分解Ettringite（船尾）。在溶剂更换后，与真空干燥样品相比，烘箱干燥略微分解后，可能是由于烘箱干燥过程中船尾的碳酸化。由于D-干燥和烘箱干燥的船尾的分解影响了CSA水合物的组成和微观结构分析。此外，溶剂中样品的浸泡时间对CSA水泥的水合产物的热匍匐（TG）分析没有影响，这表明CSA水泥水合物没有与溶剂相互作用。

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  • 来源
    《Materials and structures》 |2020年第4期|89.1-89.11|共11页
  • 作者

    Min Liu; Shuqiong Luo; Lei Yang; Jun Ren;

  • 作者单位

    Guangdong Key Laboratory of Durability in Coastal Civil Engineering College of Civil Engineering Shenzhen University Shenzhen 518060 People's Republic of China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 People's Republic of China;

    Henan Key Laboratory of Materials on Deep-Earth Engineering School of Materials Science and Engineering Henan Polytechnic University Jiaozuo 454003 People's Republic of China;

    Henan Key Laboratory of Materials on Deep-Earth Engineering School of Materials Science and Engineering Henan Polytechnic University Jiaozuo 454003 People's Republic of China;

    Guangdong Key Laboratory of Durability in Coastal Civil Engineering College of Civil Engineering Shenzhen University Shenzhen 518060 People's Republic of China School of Science Harbin Institute of Technology (Shenzhen) Nanshan Shenzhen 518055 People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Calcium sulfoaluminate cement; Ettringite; Drying techniques; Composition; Microstructure;

    机译：硫化钙水泥;Ettringite;干燥技术;作品;微观结构;

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