Prospects for the use of stone processing waste to obtain architectural and building ceramics
architectural and construction products, stone processing, sludge, semi-dry pressing, physical and mechanical properties, clinker ceramics
The article presents the results of a study of stone processing waste in order to justify the implementation of the technological process of manufacturing architectural and construction products with their use. The structure of the distribution of waste arising from stone processing processes is given. The analysis of the relevance of the problems of utilization of slurry waste stone processing. Studies were conducted to determine the chemical, mineralogical and phase composition of stone waste. It was found that these wastes belong to gabbro-diabase rocks, which was confirmed by their chemical and mineralogical composition. The main mineral components are plagioclase, pyroxene and minerals of the iron group. The moisture content of the initial pulp and the particle size distribution of dry sludge were determined. Based on the results of establishing the melting temperature and fire resistance of baked sludge samples, the possibility of obtaining architectural and construction products based on dry sludge using ceramic technology (semi-dry pressing and sintering) was established, for which a selection of technological parameters and initial mass compositions was carried out. The promising compositions of ceramic masses with a significant sludge content (up to 60%), as well as the temperature-time regimes of the formation of ceramic materials, which are in the range from 1100 to 1200°C, are determined. The physicomechanical properties for sintered ceramic materials are studied, namely, mechanical strength compression (up to 55 MPa) and wear resistance (up to 0,45%), which corresponds to the properties of clinker ceramic materials. Based on the foregoing, a conclusion was drawn on the prospects of using stone slurry for obtaining ceramic products for architectural and construction purposes.
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