The phase composition of Portland cements is typically determined using conventional techniques like X-ray Diffraction (XRD) Rietveld analysis, optical microscopy point counting, and electron microscopy. However, these techniques have several limitations that may affect their accuracy in certain sample-specific scenarios. Here, we report a highly accurate phase quantification of 11 different types of commercial, anhydrous cements using a new and complementary technique: Raman imaging. Specifically, for the 4 principal phases, composition from our extensive data (250,000 Raman spectra per sample, error < 0.71%) and those obtained from XRD Rietveld and supplier data have high coefficients of determination (R² > 0.98, mean deviation <2%). Additionally, we also quantify 8 secondary phases present in cement clinkers (gypsum, anhydrite, bassanite, syngenite, dolomite, calcite, quartz, and portlandite) with a high degree of confidence, thereby demonstrating that Raman imaging is a highly versatile tool for anhydrous phase quantification in a broad variety of cements.

通常使用 X 射线衍射 (XRD) Rietveld 分析、光学显微镜点计数和电子显微镜等常规技术确定波特兰水泥的相组成。然而，这些技术有几个限制，可能会影响它们在某些特定于样本的情况下的准确性。在这里，我们报告了使用一种新的互补技术：拉曼成像对 11 种不同类型的商业无水水泥进行了高度准确的相位量化。具体而言，对于 4 个主要相，来自我们大量数据（每个样品 250,000 个拉曼光谱，误差 < 0.71%）的成分以及从 XRD Rietveld 和供应商数据获得的成分具有很高的决定系数 (R ² > 0.98，平均偏差 <2%）。此外，我们还高度自信地量化了水泥熟料（石膏、硬石膏、贝桑石、自生岩、白云石、方解石、石英和硅酸盐）中存在的 8 种次级相，从而证明拉曼成像是一种高度通用的无水相工具量化各种水泥。