The System CaO-Al2O3-H2O |
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| Authors: | A J MAJUMDAR RUSTUM ROY |
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| Affiliation: | College of Mineral Industries, The Pennsylvania State University, University Park, Pennsylvania |
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| Abstract: | Phase equilibria have been determined in the system CaO-Al2O3-H2O in the temperature range 100° to 1000°C. under water pressures of up to 3000 atmospheres. Only three hydrated phases are formed stably in the system: Ca(OH)2, 3CaO·Al2O3·6H2O, and 4CaO·3Al2O3-3H2O. Pressure-temperature curves delineating the equilibrium decomposition of each of these phases have been determined, and some ther-mochemical data have been deduced therefrom. It has been established that both the compounds CaO·Al2O3 and 3CaO·Al2O3 have a minimum temperature of stability which is above 1000°C. The relevance of the new data to some aspects of cement chemistry is discussed. |
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