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Geopolymer composites containing woven cotton fabric (0–8.3 wt%) were fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 ℃, 400 ℃, 600 ℃, 800 ℃ and 1000 ℃. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 ℃, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.


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Mechanical properties of cotton fabric reinforced geopolymer composites at 200–1000 ℃

Show Author's information Thamer ALOMAYRIa,bLes VICKERSaFaiz U. A. SHAIKHcIt-Meng LOWa( )
Department of Imaging & Applied Physics, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
Department of Physics, Umm Al-Qura University, Makkah 21955, Saudi Arabia
Department of Civil Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia

Abstract

Geopolymer composites containing woven cotton fabric (0–8.3 wt%) were fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 ℃, 400 ℃, 600 ℃, 800 ℃ and 1000 ℃. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 ℃, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.

Keywords: fracture toughness, mechanical properties, microstructures, geopolymer composites

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Publication history
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Publication history

Received: 09 April 2014
Revised: 15 May 2014
Accepted: 28 May 2014
Published: 02 September 2014
Issue date: September 2014

Copyright

© The author(s) 2014

Acknowledgements

The authors would like to thank Ms. E. Miller for the assistance with SEM.

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Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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