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Hydration of a calcium sulfoaluminate cement blended with zincite

Gwenn Le Saout 1 Dominique Lafon-Pham 2 Jean Claude Roux 3
1 DMS - Durabilité des éco-Matériaux et Structures
LMGC - Laboratoire de Mécanique et Génie Civil, C2MA - Centre des matériaux des Mines d'Alès
2 I3A - Informatique, Image, Intelligence Artificielle
LGI2P - Laboratoire de Génie Informatique et d'Ingénierie de Production
Abstract : A calcium sulfoaluminate (CSA) cement has been characterised by X-ray diffraction and energy-dispersive X-ray spectroscopy analysis. Selective extraction methods have been used to improve detection limits for identification and quantitative measurements. Perovskites are present in the cement in the form of brownmillerite and a phase with the following average chemical composition Ca1·95Mg0·05Al0·29Ti0·39Fe1·03Si0·22O5·18. The zincite is known as a strong retarder for ordinary Portland cement (OPC), and its effect on the hydration of CSA cement was investigated using isothermal calorimetry, thermal analysis and X-ray diffraction. The low pH of the pore solution in the CSA cement compared to the OPC considerably reduces the solubility of zincite and, at an early age of hydration, zincite behaves as a filler in the CSA cement
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https://hal.mines-ales.fr/hal-02563140
Contributor : Administrateur Imt - Mines Alès <>
Submitted on : Tuesday, May 5, 2020 - 10:17:26 AM
Last modification on : Thursday, May 7, 2020 - 1:09:34 AM

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Gwenn Le Saout, Dominique Lafon-Pham, Jean Claude Roux. Hydration of a calcium sulfoaluminate cement blended with zincite. Advances in Cement Research, Thomas Telford, In press, pp.1-30. ⟨10.1680/jadcr.19.00136⟩. ⟨hal-02563140⟩

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