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 (R2 > 0.99, Δwt% < 2.5 %). Thirdly, Raman imaging area can be reliably reduced (25 mm2 to 9 mm2) to shorten scan time by 2.5× (8 h to 3 h).

中文翻译：

---

通过 X 射线衍射和拉曼成像相结合对无水波特兰水泥进行定量相分析：分析参数的协同作用和影响


胶凝材料的定量相分析对于了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，我们对一个普通样品（ASTM I/II 型 OPC）采用了两种高度不同的技术（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鉴定中高度互补，因为某些熟料相在一个阶段中很难检测到，而不是在另一个阶段中。其次，定量分析会受到首选取向、相加顺序和二值化算法性质等参数的影响。特异性信噪比 （SNT = 5） 和环氧树脂信号比 （EST = 10） 阈值导致两种方法之间的比对最高 （R2 > 0.99，Δwt% < 2.5 %）。第三，拉曼成像区域可以可靠地缩小（25 mm2 至 9 mm2），从而将扫描时间缩短 2.5×（8 小时至 3 小时）。