ListarQICM - Artículos por tema "Rietveld method"
Mostrando ítems 1-9 de 9
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Accuracy in Cement Hydration Investigations: Combined X-ray Microtomography and Powder Diffraction Analyses
(MDPI, 2021-11-17)Cement hydration is a very complex set of processes. The evolution of the crystalline phases during hydration can be accurately followed by X-ray powder diffraction data evaluated by the Rietveld method. However, accurate ... -
Assessment of the quantitative accuracy of Rietveld/XRD analysis of crystalline and amorphous phases in fly ash
(2017)An internal standard method based on Rietveld/XRD whole-pattern fitting analysis of fly ash is used to assess the quantitative accuracy to determine its crystalline and amorphous phases under various conditions such as ... -
Belite hydration at high temperature and pressure by in situ synchrotron powder diffraction
(2020-10-16)Portland cements are currently used as Oil‐Well‐Cements for the sheath between the metal casing and the borehole. At high pressures and temperatures, the resulting C-S-H gel(s) is partly unstable and it can react to give ... -
Effect of calcium sulfate source on the hydration of calcium sulfoaluminate eco-cement
(2014)The availability of cements, including eco-cements, with tailored mechanical properties is very important for special applications in the building industry. Here we report a full study of the hydration of calcium sulfoaluminate ... -
Hydration mechanisms of two polymorphs of synthetic ye'elimite
(Elsevier, 2014-05-26)Ye'elimite is the main phase in calcium sulfoaluminate cements and also a key phase in sulfobelite cements. However, its hydrationmechanismis not well understood. Here we reported newdata on the hydration behavior of ... -
Hydration of C4AF in the presence of other phases: A synchrotron X-ray powder diffraction study
(Elsevier, 2015)Hydration behaviour of C4AF in selected experimental conditions has been determined. C4AF has been hydrated in the absence and presence of gypsum, two polymorphs of ye’elimite and different water/solid ratios. C4AF in ... -
Influence of fly ash blending on hydration and physical behavior of Belite-Alite-Ye'elimite cements
(2018-10-19)A cement powder, composed of belite, alite and ye’elimite, was blended with 0, 15 and 30 wt% of fly ash and the resulting lended cements were further characterized. During hydration, the presence of fly ash caused the ... -
Rietveld quantitative phase analysis of yeelimite-containing cements
(Karen Scrivener, 2012)Yeelimite-containing cements are attracting attention for their tailored properties. Calcium sulfoaluminate, CSA, cements have high contents of Yeelimite and they are used for special applications. Belite calcium sulfoaluminate, ... -
Rietveld quantitative phase analysis of Yeelimite-containing cements
(Elsevier, 2012-03-26)Yeelimite-containing cements are attracting attention for their tailored properties. Calcium sulfoaluminate, CSA, cements have high contents of Yeelimite and they are used for special applications. Belite calcium sulfoaluminate, ...