Open AccessHigh-strength fluoroanhydrite composition
Author(s) -
Grigory Yakovlev,
Jadvyga Kerienė,
В П Грахов,
Rostislav Drochytka,
Anastasiya Gordina,
A.P. PICHUGIN,
Kirill A. Bazhenov,
Viktoriya V. Troshkova
Publication year - 2019
Publication title -
modern building materials, structures and techniques
Language(s) - English
Resource type - Conference proceedings
eISSN - 2029-9907
pISSN - 2029-9915
DOI - 10.3846/mbmst.2019.042
Subject(s) - gypsum , microstructure , raw material , composition (language) , chemical composition , materials science , water resistance , matrix (chemical analysis) , compressive strength , composite number , phase (matter) , chemical engineering , chemistry , composite material , organic chemistry , linguistics , philosophy , engineering
The research studies the properties of a high-strength anhydrite composition based on fluoroanhydrite, awaste 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 thehardened composite, and the study of the fluoroanhydrite microstructure revealed the formation of a denser matrixwith 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.