Microbial mineralization has a significant effect on the hydration process of cement-based materials. This paper mainly studied the characterization methods for hydration degree and hydration product of C₃S in hardened paste under microbial mineralization. Quantitative X-ray diffraction (QXRD), thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FT-IR), and electron backscatter diffraction (EBSD) were used and compared. The results showed that microbial mineralization increased the hydration degree of T-C₃S. QXRD and EBSD could be used to characterize the content of C₃S, and there were few differences between the two methods. TG could accurately characterize the content of Ca(OH)₂ and CaCO₃ at different depths of the sample, and FT-IR could qualitatively characterize the presence of Ca(OH)₂ and CaCO₃.

中文翻译：

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微生物矿化作用对硬化C3S糊的微观结构影响的表征方法

微生物矿化对水泥基材料的水化过程具有重要影响。本文主要研究了微生物矿化作用下硬化糊料中C ₃ S的水合度和水合产物的表征方法。使用了定量X射线衍射（QXRD），热重分析（TG），傅里叶变换红外光谱（FT-IR）和电子背散射衍射（EBSD）进行了比较。结果表明，微生物矿化作用提高了TC ₃ S的水合度。QXRD和EBSD可用于表征C ₃ S的含量，两种方法之间几乎没有差异。TG可以准确表征Ca（OH）₂和CaCO ₃的含量在样品的不同深度，FT-IR可以定性地表征Ca（OH）₂和CaCO _3的存在。