Gypsum binders based on ceramic industry waste

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Abstract

A tense situation is emerging in Uzbekistan regarding the supply of high-quality natural raw materials to the gypsum production industry. Consequently, many industrial man-made wastes containing gypsum compounds are disposed of in landfills. These wastes, which are harmful to the environment, are valuable raw materials that can be used in the production of gypsum binders in many cases. The use of man-made waste in the production allows to achieve great economic efficiency in the production of gypsum binders and various construction materials and products based on two important problems -prevention of environmental pollution. The article describes the results of scientific research on obtaining gypsum binders from waste molds used in ceramic industry enterprises producing porcelain and sanitary-technical products. Waste molds of “EKOKERAMA” LLC (Fergana city, Uzbekistan) were used in the research. Waste mold pieces were treated with isothermal heat under “thermal shock” conditions. Due to the increase in the amount of α-modification of gypsum in the resulting product, gypsum binders whose physical and mechanical properties meet the requirements of GOST 23789-2018 were obtained.

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Is Open Access

Steam structure and thermal conductivity of lightweight concrete aggregate

M. A. Mirzajanov, M. M. Ergashev, B. A. Otakulov … (2023)

The article describes the results of theoretical and experimental studies to identify the relationship between the parameters of the steam structure and thermal conductivity of ashclaydite. The correlation dependences of the thermal conductivity coefficient of ash-claydite on its parameters of the stream structure have been established. The analysis of these works shows that the thermal conductivity of lightweight concrete depends on the type of porous aggregate, on the direction of the heat flow in relation to the layering of the concrete, the average temperature at which heat transfer occurs, the average density and moisture content of the concrete. In most works, a significant effect of the steam structure of the aggregate on the thermal conductivity of concrete is noted.