Abstract
The variation of the solubility values of ettringite in the presence of alite, lime, and monocarboaluminate hydrate at 30 and l00°C is studied. The solubility product of ettringite is found to be 1.98 × 10−37 in pure water, 1.11 × 10−40 in the presence of alite with a mole ratio of l0, and insoluble in the presence of saturated lime solution as well as in an excess amount of monocarboaluminate hydrate. The ettringite phase reacts with the calcium silicate hydrates with the weakening of its X-ray diffraction intensity; at the boiling water temperature the tobermorite phase forms, in the presence of lime or monocarboaluminate hydrate the hydrogarnet phase appears beside the monophase solid solution.
Published Version
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