The Effect of Solid-to-Liquid Ratio and Temperature on Mechanical Properties of Kaolin Geopolymer Ceramics

Abstract:

The effect of solid-to-liquid ratio and temperature on the mechanical properties of kaolin geopolymer ceramics are studied. Kaolin and alkaline activator were mixed with the solid-to-liquid ratio in the range of 0.8-1.2. Alkaline activator was formed by mixing the 12 M NaOH solution with sodium silicate at a ratio of 0.24. Kaolin geopolymer ceramic have been produced by using powder metallurgy (PM) technique. The samples were heated at different temperature started from 900 °C until 1200 °C and the strength were tested. The relative density and flexural strength of sintered sample range approximately 84%-95% and 20-90 MPa respectively. The result revealed that the optimum flexural strength was obtained at solid-to-liquid ratio of 1.0 and the samples heated at 1200 °C achieved the highest flexural strength (90 MPa).

• Periodical: Key Engineering Materials (Volume 660)
• Pages: 23-27
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.660.23
• Online since: August 2015
• Authors: Romisuhani Ahmad*, Mohd Mustafa Al Bakri Abdullah, Hussin Kamarudin, Andrei Victor Sandu, Mohammed Binhussain, Mohd Izzat Ahmad, Nur Ain Jaya
• Keywords: Alkaline Activator Solution, Geopolymer Ceramic, Kaolin Based Geopolymer

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