Quantitative phase analysis of cementitious materials is crucial for understanding and predicting their performance. For anhydrous Portland cements, a variety of techniques based on microscopy, spectroscopy, and diffraction exist. Here, we employ two highly diverse techniques (X-ray Diffraction and Raman Imaging) to a common sample (ASTM Type I/II OPC). We find that, firstly, the two methods are highly complementary in the initial phase identification, given that certain clinker phases are difficult to detect in one as opposed to the other. Secondly, quantitative analysis can be influenced by parameters such as preferred orientation, order of phase addition, and the nature of the binarization algorithm. Specific signal-to-noise (SNT = 5) and epoxy-to-signal (EST = 10) thresholds resulted in the highest alignment between the two methods (R > 0.99, Δwt% < 2.5 %). Thirdly, Raman imaging area can be reliably reduced (25 mm to 9 mm) to shorten scan time by 2.5× (8 h to 3 h).

中文翻译：

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通过组合 X 射线衍射和拉曼成像对无水波特兰水泥进行定量物相分析：分析参数的协同作用和影响


水泥材料的定量相分析对于理解和预测其性能至关重要。对于无水波特兰水泥，存在多种基于显微镜、光谱学和衍射的技术。在这里，我们对通用样品（ASTM I/II 型 OPC）采用两种高度多样化的技术（X 射线衍射和拉曼成像）。我们发现，首先，这两种方法在初始相识别方面具有高度互补性，因为与另一种方法相比，一种方法中的某些熟料相难以检测。其次，定量分析可能受到优选方向、相添加顺序以及二值化算法的性质等参数的影响。特定的信噪比 (SNT = 5) 和环氧树脂信号比 (EST = 10) 阈值导致两种方法之间的一致性最高 (R > 0.99，Δwt% < 2.5 %)。第三，拉曼成像面积可以可靠地减小（25毫米至9毫米），从而将扫描时间缩短2.5倍（8小时至3小时）。