Influence of superplasticizers on the hydration of cement

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ConferencePreprints of the 3rd International Congress on Polymers in Concrete: 13 May 1981, Koriyama, Japan
Pages10711081; # of pages: 11
Subjecthydrated cement; hydration; aluminate cement; polymer concrete; Admixtures
AbstractHydration 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.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number19868
NPARC number20375959
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Record identifier523be69c-c079-49a8-a330-8a71968f30cb
Record created2012-07-23
Record modified2016-05-09
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