This article focuses on the thermal behavior of G1 series geopolymer composites based on Changi glauconite modified with SiC and basalt. The mass loss of the samples during firing in the range 700-900 °C was studied, which is a direct indicator of the intensity of gas evolution and, consequently, swelling. The quantitative mass loss data obtained demonstrate a sharp increase in gas evolution at high temperatures and with the use of a blowing agent. It was found that firing at 700-900°C for the combined G1-2Si-2B sample results in the maximum mass loss (66.5%), indicating the optimal thermal regime for achieving minimum density.

M. Król and P. Rożek, “The effect of calcination temperature on metakaolin structure for the synthesis of zeolites,” Clay Minerals, vol. 53, no. 4, pp. 657–663, 2018. https://doi.org/10.1180/clm.2018.49

S. U. Ruzimova and Z. A. Babakhanova, “Study of raw mineral resources of Uzbekistan for production of lightweight ceramic materials,” Innovative Academy Research Support Center, 2022. [Online]. Available: https://cyberleninka.ru/article/n/izuchenie-syrievyh-mineralnyh-resursov-uzbekistana-dlya-polucheniya-legkovesnyh-keramicheskih-materialov

B. S. Zakirov and K. M. O., “The composition and properties of glauconite sands and nodular phosphorites of Karakalpakstan and the production of fertilizers,” Austrian Journal of Technical and Natural Sciences, no. 9–10, pp. 27–31, 2018.

G. El-Habaak, M. Askalany, and M. Abdel-Hakeem, “Building up and Characterization of Calcined Marl-Based Geopolymeric Cement,” Infrastructures, vol. 3, no. 3, p. 22, 2018. https://doi.org/10.3390/infrastructures3030022

K.-W. Lo, Y.-W. Lin, T.-W. Cheng, K.-L. Lin, and W.-T. Lin, “Recycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials,” Polymers, vol. 13, no. 22, p. 4029, 2021. https://doi.org/10.3390/polym13224029

M. Ziada, S. Erdem, Y. Tammam, S. Kara, and R. A. G. Lezcano, “The Effect of Basalt Fiber on Mechanical, Microstructural, and High-Temperature Properties of Fly Ash-Based and Basalt Powder Waste-Filled Sustainable Geopolymer Mortar,” Sustainability, vol. 13, no. 22, p. 12610, 2021. https://doi.org/10.3390/su132212610

M. Łach et al., “The Influence of the Addition of Basalt Powder on the Properties of Foamed Geopolymers,” Materials, vol. 17, no. 10, p. 2336, 2024. https://doi.org/10.3390/ma17102336