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Hydration reactions in pastes C3S+C3A+CaSO4.2aq+H2O at 25°C.I |
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| Authors: | WA Corstanje HN Stein JM Stevels |
| Affiliation: | a Laboratory of General Chemistry, Technological University, Eindhoven, The Netherlands b Laboratory of Inorganic Chemistry Technological University, Eindhoven, The Netherlands |
| Abstract: | 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. |
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