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.

中文翻译：

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除水技术对硬化硫铝酸钙水泥浆组成和微观结构的影响

本研究研究了不同干燥技术，即真空干燥、烘箱干燥 (40 °C) 和 D 干燥对硫铝酸钙 (CSA) 水泥的组成和微观结构的影响。将样品浸入丙酮或乙醇后进行真空干燥和烘箱干燥。结果表明，D-干燥大大分解钙矾石(AFt)。更换溶剂后，与真空干燥的样品相比，烘箱干燥会轻微分解 AFt，这可能是由于烘箱干燥过程中 AFt 的碳化。由于 D 干燥和烘箱干燥引起的 AFt 分解影响 CSA 水合物的成分和微观结构分析。此外，样品在溶剂中的浸泡时间对 CSA 水泥水化产物的热重 (TG) 分析没有影响，