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PhreeqC modeling of Friedel's salt equilibria at 23 +/- 1 degree C
A series of slurries containing Friedel's salt (3CaO dot Al 2O3 dot CaCl2 dot 10H2O) in equilibrium with other solids that include Al(OH)3, Ca(OH) 2, and 3CaO dot Al2O3 dot 6H 2O were produced at room temperature (23+/-1 degree C). The liquid phases were analyzed for calcium, aluminum, and chlorine, and the speciation program PhreeqC was used to model the equilibria that were established between the solid and liquid phases. By matching closely, the experimentally determined solution parameters with those calculated using PhreeqC, important information concerning equilibria in the CaO-Al2O3-CaCl2-H 2O system was obtained. For example, it was shown that the stable phase pair, Friedel's salt/3CaO dot Al2O 3 dot 6H2O, acts to buffer against rising chloride concentrations by acting as a chloride sink. PhreeqC calculations have estimated the solubility product of Friedel's salt to fall within the range -28.8sp<-27.6.
PhreeqC modeling of Friedel's salt equilibria at 23 +/- 1 degree C
A series of slurries containing Friedel's salt (3CaO dot Al 2O3 dot CaCl2 dot 10H2O) in equilibrium with other solids that include Al(OH)3, Ca(OH) 2, and 3CaO dot Al2O3 dot 6H 2O were produced at room temperature (23+/-1 degree C). The liquid phases were analyzed for calcium, aluminum, and chlorine, and the speciation program PhreeqC was used to model the equilibria that were established between the solid and liquid phases. By matching closely, the experimentally determined solution parameters with those calculated using PhreeqC, important information concerning equilibria in the CaO-Al2O3-CaCl2-H 2O system was obtained. For example, it was shown that the stable phase pair, Friedel's salt/3CaO dot Al2O 3 dot 6H2O, acts to buffer against rising chloride concentrations by acting as a chloride sink. PhreeqC calculations have estimated the solubility product of Friedel's salt to fall within the range -28.8sp<-27.6.
PhreeqC modeling of Friedel's salt equilibria at 23 +/- 1 degree C
Bothe, James V. jun. (author) / Brown, Paul W. (author)
Cement and Concrete Research ; 34 ; 1057-1063
2004
7 Seiten, 24 Quellen
Article (Journal)
English
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