1. High-strength fluoroanhydrite composition.
- Author
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Yakovlev, Grigory, Keriene, Jadvyga, Grakhov, Valery, Drochytka, Rostislav, Gordina, Anastasiya, Pichugin, Anatoly, Bazhenov, Kirill, and Troshkova, Viktoriya
- Subjects
ANHYDRITE ,WASTE products ,HYDROFLUORIC acid ,CONSTRUCTION materials ,RAW materials - Abstract
The research studies the properties of a high-strength anhydrite composition based on fluoroanhydrite, a waste product of hydrofluoric acid. To activate fluoranhydrite, Na3PO4 sodium phosphate was added to the composition in an amount of 3% of the mass. The physico-chemical studies of the structure and properties of activated fluoroanhydrite conducted using infrared spectroscopy and X-ray phase analysis showed changes in the composition of the hardened composite, and the study of the fluoroanhydrite microstructure revealed the formation of a denser matrix with the increased strength. An increase in the water resistance of the developed binder matrix was noted. The composition can be used as a cheap substitute for gypsum plaster due to the low prime cost of raw materials, and also contribute to the improvement of the environmental situation in fluoroanhydrite disposal sites. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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