This study demonstrates the application and combination of multiple imaging techniques [light microscopy, micro-X-ray computer tomography (μ-CT), scanning electron microscopy (SEM) and focussed ion beam – nano-tomography (FIB-nT)] to the analysis of the microstructure of hydrated alite across multiple scales. However, by comparing findings with mercury intrusion porosimetry (MIP), it becomes obvious that the imaged 3D volumes and 2D images do not sufficiently overlap at certain scales to allow a continuous quantification of the pore size distribution (PSD). This can be overcome by improving the resolution and increasing the measured volume. Furthermore, results show that the fibrous morphology of calcium-silicate-hydrates (C-S-H) phases is preserved during FIB-nT. This is a requirement for characterisation of nano-scale porosity. Finally, it was proven that the combination of FIB-nT with energy-dispersive X-ray spectroscopy (EDX) data facilitates the phase segmentation of a 11 × 11 × 7.7 μm³ volume of hydrated alite.

中文翻译：

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使用多种 2D 和 3D 成像技术重建硅酸钙水合物：光学显微镜、μ-CT、SEM、FIB-nT 结合 EDX

本研究展示了多种成像技术 [光学显微镜、微型 X 射线计算机断层扫描 (μ-CT)、扫描电子显微镜 (SEM) 和聚焦离子束 - 纳米断层扫描 (FIB-nT)] 的应用和组合。跨多个尺度的水合阿利特微观结构分析。然而，通过将结果与压汞法 (MIP) 进行比较，很明显，成像的 3D 体积和 2D 图像在某些尺度上没有充分重叠，无法对孔径分布 (PSD) 进行连续量化。这可以通过提高分辨率和增加测量体积来克服。此外，结果表明，在 FIB-nT 过程中，硅酸钙水合物 (CSH) 相的纤维形态得以保留。这是表征纳米级孔隙率的要求。最后，³体积的水合阿利特。