The fire performance of a geocement-based binder was investigated with a combination of analytical techniques, in terms of changes in composition and microstructure. Geocement, formulated as Na2O∙Al2O3∙6SiO2∙20H2O, was prepared using metakaolin, sodium water-glass, rotten stone and sodium hydroxide. The mixture was homogenized by passing through a hydrodynamic cavitator. Cubes of 20 mm were prepared, hardened at laboratory conditions for 28 days, and subsequently burnt at 600, 800 and 1200 °C in a laboratory furnace. Cavitation treatment resulted in a highly amorphous binder; amorphous fraction decreased upon firing up to 800 °C due to crystallization, and increased above 1000 °C because of melt formation. Porosity increased with firing temperature and pores larger than 1 mm in diameter prevailed at 1200 °C. The material remained stable up to 1200 °C. The results indicate the adequacy of this geocement-based binder for preparing fire-protecting materials.

The effect of firing temperature on the composition and microstructure of a geocement-based binder of sodium water-glass / Sotiriadis, K.; Guzii, S.; Kumpova, I.; Macova, P.; Viani, A.. - In: DIFFUSION AND DEFECT DATA, SOLID STATE DATA. PART B, SOLID STATE PHENOMENA. - ISSN 1012-0394. - 267:(2017), pp. 58-62. (Intervento presentato al convegno 26th International Baltic Conference on Materials Engineering, 2017 tenutosi a Kaunas, Lituania nel 2017) [10.4028/www.scientific.net/SSP.267.58].

The effect of firing temperature on the composition and microstructure of a geocement-based binder of sodium water-glass

Viani A.
2017

Abstract

The fire performance of a geocement-based binder was investigated with a combination of analytical techniques, in terms of changes in composition and microstructure. Geocement, formulated as Na2O∙Al2O3∙6SiO2∙20H2O, was prepared using metakaolin, sodium water-glass, rotten stone and sodium hydroxide. The mixture was homogenized by passing through a hydrodynamic cavitator. Cubes of 20 mm were prepared, hardened at laboratory conditions for 28 days, and subsequently burnt at 600, 800 and 1200 °C in a laboratory furnace. Cavitation treatment resulted in a highly amorphous binder; amorphous fraction decreased upon firing up to 800 °C due to crystallization, and increased above 1000 °C because of melt formation. Porosity increased with firing temperature and pores larger than 1 mm in diameter prevailed at 1200 °C. The material remained stable up to 1200 °C. The results indicate the adequacy of this geocement-based binder for preparing fire-protecting materials.
2017
26th International Baltic Conference on Materials Engineering, 2017
Kaunas, Lituania
2017
267
58
62
Sotiriadis, K.; Guzii, S.; Kumpova, I.; Macova, P.; Viani, A.
The effect of firing temperature on the composition and microstructure of a geocement-based binder of sodium water-glass / Sotiriadis, K.; Guzii, S.; Kumpova, I.; Macova, P.; Viani, A.. - In: DIFFUSION AND DEFECT DATA, SOLID STATE DATA. PART B, SOLID STATE PHENOMENA. - ISSN 1012-0394. - 267:(2017), pp. 58-62. (Intervento presentato al convegno 26th International Baltic Conference on Materials Engineering, 2017 tenutosi a Kaunas, Lituania nel 2017) [10.4028/www.scientific.net/SSP.267.58].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1316067
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