Engineering Mechanics

Proceedings Vol. 20 (2014)

ENGINEERING MECHANICS 2014

Copyright © 2014 Brno University of Technology Institute of Solid Mechanics, Mechatronics and Biomechanics

 

Nhan P.T., Samal S., Petrikova I., Marvalová B.
pages 459 - 462, full text

A correlation between increase in mechanical strength and the microstructure reliability of fabric reinforced geo-composite is established in elevated temperature range. The mechanical strength of the fabric reinforced geo-composite is investigated at elevated temperature in terms of physical, fire testing and thermal conductivity. The strength of carbon based geo-polymer increased towards higher temperature that strongly correlated with development of various microstructures. Fire testing was conducted on 15 mm thick panels with surface exposure of region 100 x 100 mm. The fires rating more than half an hour were achieved with resistance to shrinkage cracking exhibited as important parameter. The microstructure of geocomposite shows large pores towards 600 ºC, that indicated lower in mechanical strength. On increasing the temperature, microstructure of carbon based geo-composite shows oxidized layer and very homogenous layer with less porosity. As a result the mechanical strength increases on increasing the temperature and developing oxidized layer. Fiber reinforced composites may be considered as an alternative to improve flexural strength and fracture toughness at elevated temperature. The carbon reinforced geo-composite proves as one of the suitable candidate for the high temperature applications such as thermal barrier and fire resistant panels.

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