| Abstrakt: |
This project is devoted to the investigation of the properties of Seversk granodiorite for the purpose of its application in the production of fine ceramics. It was found that the mineral composition of granodiorite is as follows, %: quartz 18–22; plagioclases, such as albite 46–30 and anorthite 9–11, orthoclase 10–12, hornblende similar in composition to pargasite, 14–25, pyrite up to 1, analcime up to 1. Granodiorite contains up to 9% alkaline oxides, up to 4% iron oxide, up to 4.5% CaO. It is proposed to use granodiorite as a sintering additive in the production of building ceramics, for example, ceramic tiles, acid-resistant materials, proppants, and other products based on clay materials. It is shown that the introduction of granodiorite in an amount of up to 20% effectively affects the sintering processes. The sintering temperature decreases from 1200 to 1150 °C, the water absorption is 0.9%, the density is 2.39 g·cm−3. The sintering interval for such masses is approximately 50 °C. At low firing temperatures in the range of 1050–1100 °C, the water absorption is 5.8–2.1%, the apparent density is about 2.29 g·cm−3. It was found that the introduction of a larger amount of granodiorite is ineffective. This leads to a narrowing of the sintering interval and to increased deformation of the samples during firing. With a decrease in the firing temperature of masses with an increased granodiorite content, zero water absorption is also achieved at a firing temperature of 1150°C. [ABSTRACT FROM AUTHOR] |
