Fire resistant geopolymers are developed and the performance under thermal loading is examined and compared in this paper. The geopolymers were prepared by mixing the solid phase, metallurgical slag and metakaolin
with a highly alkaline potassium hydroxide aqueous phase in order to create a
paste that was subsequently cured at 70℃ for a certain period of
time. The developed materials were tested for the mechanical, physical and
thermal properties. The behaviour of the geopolymers upon exposure on fire was studied following the EFNARC guidelines for testing
of passive fire protection for concrete tunnels linings. The geopolymers were subjected to the most
severe fire scenario, the Rijks Water Staat (RWS) temperature-time curve. Both geopolymers
appeared great behaviour after the test reaching temperature lower than the RWS
test requirement, proving the ability of both materials to work successfully as
an efficient thermal barrier. Thus, the concrete slab protected by the
geopolymers did not appear any form of spalling or degradation of its compressive strength.
Cite this paper
Sakkas, K. , Panias, D. , Nomikos, P. and Sofianos, A. (2017). Comparison of Fire Resistant Geopolymers for Passive Fire Protection of Concrete Tunnel Linings. Open Access Library Journal, 4, e3327. doi: http://dx.doi.org/10.4236/oalib.1103327.
K., Nomikos, P., Sofianos, A. and Panias,
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Polymeric Materials for Passive Fire Protection of Underground Constructions. Journal of Fire and Materials, 37,
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