Role of phosphogypsum in the hydration of calcium sulphoaluminate
β Scribed by Luciano Santoro; Rossella Garofano; Gian Lorenzo Valenti
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 454 KB
- Volume
- 116
- Category
- Article
- ISSN
- 0040-6031
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π SIMILAR VOLUMES
The stability of ettringite and monosulphate in water solutions with various values of pH was studied by the potentiometric method. Measurements performed in non-equilibrium conditions showed that the boundary for the disappearance of ettringite is pH = 10.7 and for monosulphate pH = 11.6. At lower
Calcium sulphoaluminate, C4A3S, is an important mineral phase for rapid hardening sulphoaluminate cement. Its formation from molar mixes of the oxides of calcium aluminum and sulphur derived from synthetic pure chemicals and commercial grade natural minerals, such as limestone, bauxite and gypsum ha
## Msterials and Methods A number of chemical reagents and compounds synthesized in the laboratory were used in this study. A list of these is as follows: CaF 2 -Fisher Reagent Grade Ca3(PO~) 2 -Baker Reagent Grade CaHPO4.2H20 -Baker Reagent Grade Ca(H2PO~)2.H20 -Merck Reagent Grade Ca2P208 -Pyroly