MINERALOGICAL AND TECHNOLOGICAL FOUNDATIONS FOR THE USE OF NATURAL GYPSUM IN THE PRODUCTION OF BINDING MATERIALS

https://doi.org/10.48498/minmag.2025.246.10.002

The article presents the mineralogical and technological fundamentals of using natural gypsum for producing binding materials. A classification of gypsum binders by firing temperature regimes is provided, along with descriptions of their composition, properties, and hardening processes. It is shown that low-fired binders consist of 85–95% CaSO₄·0.5H₂O hemihydrate, while high-fired binders contain 80–90% CaSO₄ anhydrite. The Shert deposit in Turkestan Region (area 6.12 km², bed thickness 72 m) with industrial reserves of 250.5 Mt has been studied. Analysis revealed that the CaSO₄·2H₂O content meets foreign standards, enabling full coverage of the construction industry’s needs and reduction of imports. The study concludes that Kazakhstani gypsum is highly competitive compared to imported materials, provided it is efficiently developed and used rationally.

A. Zhumagaziev, *S. Kurbaniyazov, M. Altynbekova, A. Damenova