Hydration reactions in pastes C3S+C3A+CaSO4.2aq+H20 at 25°C.I

W.A. Corstanje, H.N. Stein, J.M. Stevels

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A characteristic retardation of the hydration of C3A is found in pastes C3S+C3A+CaSO4.2aq+H2O of weight ratios 1:3:z:4 at certain values of z, when sulphate concentration becomes insufficient for monosulphate formation. This retardation is ascribed to precipitation of amorphous Al(OH)3, when C3A dissolves in a limited amount of the aqueous phase shielded from the rest by C4AH13 or C4AH19. Evidence for the conversion of C3AH6 into C4AHn in supersaturated Ca(OH)2 solution is found.
Original languageEnglish
Pages (from-to)791-806
Number of pages16
JournalCement and Concrete Research
Issue number6
Publication statusPublished - 1973


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