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Polymorph and minor phase quantification in Portland clinker by X-ray powder diffraction analysis: Addressing challenges and foreign ion effects
Cement and Concrete Research ( IF 10.9 ) Pub Date : 2025-01-29 , DOI: 10.1016/j.cemconres.2025.107801
Paulo R. de Matos, José S. Andrade Neto, Carlos E.M. Campos, Ruben Snellings, Robert E. Dinnebier, Ana P. Kirchheim
Cement and Concrete Research ( IF 10.9 ) Pub Date : 2025-01-29 , DOI: 10.1016/j.cemconres.2025.107801
Paulo R. de Matos, José S. Andrade Neto, Carlos E.M. Campos, Ruben Snellings, Robert E. Dinnebier, Ana P. Kirchheim
A comprehensive investigation of the phase composition of eight commercial clinkers was conducted through state-of-the-art synchrotron (SXRD) and laboratory (LXRD) X-ray diffraction, and supporting techniques. Challenges involved in polymorph and minor phase quantification, and the effects of foreign ions on the clinker chemistry were addressed. SXRD yielded higher C3 S and lower C2 S contents than LXRD, besides higher C3 S M3 . Visual identification of C3 S predominant polymorphs did not always match the Rietveld results for LXRD. Using orthorhombic-C3 A in the refinement of samples that did not have this polymorph led to an underestimation of C4 AF and α′H -C2 S. Axial divergence made the quantification of β-C2 S inaccurate for non-monochromatic LXRD. C3 S formation was governed by the sulfate/magnesium ratio and Na2 Oeq content rather than LSF, while C3 S polymorphism was governed by the sulfate/magnesium + alkali ratio. Optimal chemistry ranges were proposed for maximizing C3 S formation. C3 A polymorphism was generally controlled by the sulfate/alkali ratio.
中文翻译:
通过 X 射线粉末衍射分析对波特兰熟料进行多晶型和微量相定量:应对挑战和外来离子效应
通过最先进的同步加速器 (SXRD) 和实验室 (LXRD) X 射线衍射和支持技术,对八种商业熟料的物组成进行了全面调查。解决了多晶型和微量相定量所涉及的挑战,以及外来离子对熟料化学的影响。除了更高的 C3S M3 外,SXRD 产生的 C3S 高于 LXRD,C2S 含量较低。C3S 主要多晶型物的视觉识别并不总是与 LXRD 的 Rietveld 结果相匹配。在精炼没有这种多晶型物的样品中使用正方晶型 C3A 导致 C4AF 和 α′H-C2S 的低估。轴向发散使得非单色 LXRD 的 β-C2S 定量不准确。C3S 的形成受硫酸盐/镁比和 Na2Oeq 含量的控制,而不是 LSF,而 C3S 多态性受硫酸盐/镁 + 碱比的控制。提出了最大化 C3S 形成的最佳化学范围。C3A 多态性通常受硫酸盐/碱比控制。
更新日期:2025-01-29
中文翻译:
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通过 X 射线粉末衍射分析对波特兰熟料进行多晶型和微量相定量:应对挑战和外来离子效应
通过最先进的同步加速器 (SXRD) 和实验室 (LXRD) X 射线衍射和支持技术,对八种商业熟料的物组成进行了全面调查。解决了多晶型和微量相定量所涉及的挑战,以及外来离子对熟料化学的影响。除了更高的 C3S M3 外,SXRD 产生的 C3S 高于 LXRD,C2S 含量较低。C3S 主要多晶型物的视觉识别并不总是与 LXRD 的 Rietveld 结果相匹配。在精炼没有这种多晶型物的样品中使用正方晶型 C3A 导致 C4AF 和 α′H-C2S 的低估。轴向发散使得非单色 LXRD 的 β-C2S 定量不准确。C3S 的形成受硫酸盐/镁比和 Na2Oeq 含量的控制,而不是 LSF,而 C3S 多态性受硫酸盐/镁 + 碱比的控制。提出了最大化 C3S 形成的最佳化学范围。C3A 多态性通常受硫酸盐/碱比控制。