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Influence of superplasticizers on the hydration of cement

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  1. National Research Council of Canada
FormatText, Article
Conference3rd International Congress on Polymers in Concrete, May 13, 1981, Koriyama, Japan
SubjectAdmixtures; hydrated cement; hydration; aluminate cement; polymer concrete
Abstract
Hydration and adsorption-desorption characteristics of portland cement, tricalcium aluminate, tricalcium aluminate- gypsum and tricalcium silicate were investigated in aqueous solutions of varying concentrations of sulfonated melamine formaldehyde (SMF). Conduction calorimetric curves of tricalcium aluminate hydrated in the presence of 0, 1, 2 and 4% SMF (with respect to the aluminate) showed a retardation effect. The hydration of tricalcium aluminate-gypsum system, in terms of formation of ettringite, was accelerated. Both tricalcium aluminate and the aluminate- gypsum systems adsorb irreversibly large amounts of SMF. The hydration of tricalcium silicate was retarded by SMF. Tricalcium silicate adsorbs initially less SMF than does the aluminate phase; after a few hours, however, the adsorption increases. Cement hydration is also retarded, increasing as the amount of SMF is increased. As in the silicate phase, cement adsorbs less SMF initially.
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  • Preprints of the 3rd International Congress on Polymers in Concrete: 13 May 1981, Koriyama, Japan 2 (1981): 1071–1081.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-P-1017
NRC numberNRCC 19868
NRC-IRC-3030
NPARC number20375959
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Record identifier523be69c-c079-49a8-a330-8a71968f30cb
Record created2012-07-23
Record modified2024-03-22
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