Calibration and quantitative analysis of C2AHx (2CaO·Al2O3·xH2O) by Rietveld refinement combined G-factor method
Goergens J, Köhler A, Götz-Neunhoeffer F (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 158
Article Number: 106854
DOI: 10.1016/j.cemconres.2022.106854
Abstract
This work presents a novel way to use X-ray diffraction (XRD) to quantify the plate-like calcium-aluminate-hydrate phases C2AHx (2CaO·Al2O3·xH2O), for which three different basal spacings are detected during early hydration at ambient temperatures. By combining Rietveld refinement and the G-factor method, C2AH7.5 was calibrated using a variety of syntheses and preparations for XRD. Since cell volume and X-ray density (that are necessary for the G-factor method) of C2AH7.5 are not known, an approach similar to [1,2] was used for the generation of a hkl-phase model: A “F-factor” – a factor that replaces the product of these two unknowns, which was verified by the multitude of syntheses – was successfully determined within this paper. The model was applied for the absolute quantification of C2AHx during in-situ XRD of CA (CaO·Al2O3) hydration at 40 °C. The results demonstrate the potential of the hkl-phase model in practical use and reveal the accuracy of the determined F-factor.
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APA:
Goergens, J., Köhler, A., & Götz-Neunhoeffer, F. (2022). Calibration and quantitative analysis of C2AHx (2CaO·Al2O3·xH2O) by Rietveld refinement combined G-factor method. Cement and Concrete Research, 158. https://doi.org/10.1016/j.cemconres.2022.106854
MLA:
Goergens, Julian, Andreas Köhler, and Friedlinde Götz-Neunhoeffer. "Calibration and quantitative analysis of C2AHx (2CaO·Al2O3·xH2O) by Rietveld refinement combined G-factor method." Cement and Concrete Research 158 (2022).
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