The development of technologies for utilization of coal fly ash, the huge accumulations of which represent a serious environmental threat, is an essential problem. Obtaining of ceramic materials can be a promising way of fly ash utilization. The article presents the results of sintering behavior study of Vorkuta thermal power plant fly ash at 800–1250 °C. Apparent density, water absorption, open porosity, and crushing strength of sintered samples were determined. Experiments have shown that sintering occurs at temperatures of 1050 °C and above. Ceramics obtained at a firing temperature of 1150 °C is characterized by the highest values of apparent density and crushing strength and low values of water absorption and porosity. At 1200 °C and above there is an increase in sample dimensions (foaming) with the formation of internal pores, i.e. a porous ceramics is obtained. It has been shown that the pressure and the sintering temperature affect the characteristics of ceramics: apparent density, water absorption, porosity, and crushing strength. According to its technological characteristics, the obtained materials can be used for the production of building ceramics.
CITATION STYLE
Kotova, O. B., Ignatiev, G. V., Shushkov, D. A., Harja, M., & Broekmans, M. A. T. M. (2020). Preparation and Properties of Ceramic Materials from Coal Fly Ash. In Springer Proceedings in Earth and Environmental Sciences (pp. 101–107). Springer Nature. https://doi.org/10.1007/978-3-030-00925-0_16
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