SEMI-DRY PRESSED WALL MATERIALS BASED ON GRANULAR LIMESTONE WASTE FROM STONE MINING

Abstract

this article is devoted to the study of the processes of granulation of raw materials mixtures from limestone waste of stone mining and Portland cement and the production of wall materials based on them by semi-dry pressing. The optimal humidity-time parameters of the manufacture of granules were determined, laboratory samples of wall materials from granular mixtures with different contents of Portland cement were made. It was found that the compressive strength of samples from granulated raw materials exceeds the strength of samples from non-granulated raw materials by 3-12%.

Subject of research: semi-dry pressed wall materials based on granular limestone waste from stone mining.

Materials and methods: Nummilite limestone waste from the Skalistoe deposit (Crimea) and Portland cement PC 500 DO from the Novorossiysk Cement Plant were used for the study. The physical and mechanical properties of the prototypes were determined by standard methods.

Results: Experiments have shown that the compressive strength of samples made from granules containing 5-15% Portland cement and 85-95% of stone mining waste exceeds the strength of samples from non-granulated raw materials by 3-12%.

Conclusions: The use of granular limestone waste from stone mining as the main component for the production of wall materials by semi-dry pressing makes it possible to increase their strength characteristics. The addition of Portland cement in certain proportions (5-15%) improves the strength characteristics of materials. Further research can be aimed at optimizing the composition of materials, studying their durability and adapting the production process to industrial scales.