Characterization of Heat-Resistant Geocement Based on Potassium Silica Solution

Abstract:

The aim of this paper is detailed description of synthesis geocement composite material based on K₂O-Al₂O₃-SiO₂ system and characterization its thermal properties. The series of analytic tools were used (XRF, XRD, SEM, BET, particle-size distribution) for accurate identification of chemical and physical properties of raw material. Optimum technological prescription was determined and geocement specimens were tested for identification of mechanical and thermal properties. Three series of specimens were heated up to 1000, 1100 and 1230°C and flexural strength was determined. The thermal analysis TMA and DMA were used for characterization of heat-resistant properties. The maximum shrinkage in the range 30-1000°C was for the first run in temperature rate 20°C/min. only 3%. The heating exposure at slower rate (3°C/min.) caused reduction of shrinkage up to 1.5% at 1000°C. Geocement represents attractive thermal properties.

• Periodical: Applied Mechanics and Materials (Volume 378)
• Pages: 230-234
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.378.230
• Online since: August 2013
• Authors: Tomáš Kovářík, Jaroslav Kadlec, Michal Pola, Pavel Novotný, Stanislava Podmanická, Marcela Čekalová, Lucie Kullová, David Rieger
• Keywords: Geocement, Heat-Resistant, Potassium Silicate Solution

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