Hydration kinetics and microstructural development in the 3 CaO.Al2-CaSO4.2H2O-CaCO3-H2O system

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TypeArticle
Journal titleMateriaux et constructions. Materials and Structures
ISSN0025-5432
Volume19
Issue114
Pages437444; # of pages: 8
Subjecthydration; aluminate cement; Concrete; hydratation; ciment alumineux
AbstractHydration and microstructural characteristics of mixtures containing C3A and CaSO4.2H2O (0, 12.5, 25 per cent) with or without addition of CaCO3 (0, 12.5, 25 per cent) are followed by X-ray diffraction, differential scanning calorimetry, differential thermogravimetry, scanning electron microscopy and conduction calorimetry. Depending on the length of hydration, products formed at different periods from 5 min to 3 days consisted of hexagonal calcium aluminate hydrate, cubic calcium aluminate hydrate, calcium monocarboaluminate hydrate, ettringite, calcium monosulfoaluminate hydrate and possibly a solid solution of hexagonal calcium aluminate hydrate with monocarbo- and sulfo-aluminate hydrates. Calcium carbonate retards or suppresses the formation of the cubic aluminate hydrate in the hydration of C3A. It accelerates formation of ettringite and its conversion to the monosulfoaluminate phase when added to the C3A + gypsum + H2O mixture.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierIRC-P-1438
NRC number27174
3071
NPARC number20375500
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Record identifier8ee567f0-f52f-4a04-b2f1-11d8c38cd394
Record created2012-07-23
Record modified2016-05-09
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