Fire Resistance Evaluation of Lightweight Geopolymer Concrete System Exposed to Elevated Temperatures of 100-800 °C

Abstract:

This paper reports the fire resistance property of a lightweight aggregate geopolymer concrete (LWAGC) material synthesized by the alkali-activation of locally source fly ash (FA) after exposed to elevated temperatures ranged of 100 °C to 800 °C. The results illustrates that the concrete gained a compressive strength after exposing to elevated temperatures of 100, 200 and 300 °C. Afterward, the strength of the LWAGC is started to deteriorate after exposing to elevated temperatures ranged of 400 °C to 800 °C, due to the difference in thermal expansion between the geopolymeric paste and LWA as well as to the evaporation of the structural water which increased the thermal shrinkage.

• Periodical: Key Engineering Materials (Volumes 594-595)
• Pages: 427-432
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.594-595.427
• Online since: December 2013
• Authors: Omar A. Abdulkareem, A.M. Mustafa Al Bakri, H. Kamarudin, I. Khairul Nizar
• Keywords: Compressive Strength, Elevated Temperatures, Geopolymer, Lightweight Geopolymer Concrete

References

[1] O.A. Abdulkareem, A.M. Mustafa Al-Bakri, H. Kamarudin, I. Khairul Nizar, A study on the synthesis of fly ash-based lightweight aggregate geopolymer concrete, Advanced Science Letters, Vol. 19, pp.282-285, (2013).

DOI: 10.1166/asl.2013.4720

[2] M. Mouli, H. Khelafi, Performance characteristics of lightweight aggregate concrete containing pozzolan, Building and Environment, Vol. 43, pp.31-36, (2008).

DOI: 10.1016/j.buildenv.2006.11.038

[3] J. Davidovits, Chemistry of geopolymeric systems, terminology, Proc. International Conference on geopolymers, Geopolymer '99 International conference, Geopolymer Institute, France, 1999, p.9–40.

[4] K. Yang, J. Song, J. Lee, Properties of alkali-activated mortar and concrete using lightweight aggregate, Journal of Materials and Structures, Vol. 43, pp.403-416, (2010).

DOI: 10.1617/s11527-009-9499-6

[5] Z. Li, Z. Ding, Y. Zhang, Development of sustainable cementitious materials, International Workshop on Sustainable Development and Concrete Technology, edited by K. Wang, Beijing, China, May, 2004, pp.20-21.

[6] S. Wallah and B. Rangan, Low-calcium fly ash based geopolymer concrete: Long-term properties, Research Report GC 2, Curtin University of Technology, Perth, Australia, (2006).

[7] J. Gourley and G. Johnson, Developments in geopolymer precast concrete, Proc. 4th World Congress geopolymer, Geopolymer Institute, France, 2005, pp.133-137.

[8] ACI Committee 211. 2-98, Standard practice for selecting proportions for structural lightweight concrete, USA. (2004).

[9] CEN/TC 104. EN 12390-3, Testing hardened concrete-part 3: compressive strength of testing specimens, Brussels; (2009).

[10] D.L.Y. Kong, J.G. Sanjayan, Effect of elevated temperatures on geopolymer paste, mortar and concrete, Cement and Concrete Research, Vol. 40, pp.334-339, (2010).

DOI: 10.1016/j.cemconres.2009.10.017

[11] A.M. Rashad, S.R. Zeedan, The effect of activator concentration on the residual strength of alkali-activated fly ash pastes subjected to thermal load, Construction and Building Materials, Vol. 25, pp.3098-3107, (2011).

DOI: 10.1016/j.conbuildmat.2010.12.044

[12] O.A. Abdulkareem, A.M. Mustafa Al-Bakri, H. Kamarudin, I. Khairul Nizar, Alteration in the microstructure of fly ash geopolymers upon exposure to elevated temperatures, Advance Material Research (Accepted).

DOI: 10.4028/www.scientific.net/amr.795.201

[13] W.D. Rickard, J. Temuujin, A. van Riessen, Thermal analysis of geopolymer pastes synthesised from five fly ashes of variable composition. Journal of Non-Crystalline Solids; Vol. 358, pp.1830-1839. (2012).

DOI: 10.1016/j.jnoncrysol.2012.05.032

[14] J.L. Provis, C.Z. Yong, P. Duxson, J.S.J. van Deventer, Correlation mechanical and thermal properties of sodium silicate-fly ash geopolymers, Journal of Colloids Surfaces A, Vol. p.336: 57-63, (2009).

DOI: 10.1016/j.colsurfa.2008.11.019

[15] T. Uygunoğlu, I.B. Topçu, Thermal expansion of self-consolidating normal and lightweight aggregate concrete at elevated temperature, Construction and Building Materials, Vol. 23, pp.3063-3069, (2009).

DOI: 10.1016/j.conbuildmat.2009.04.004

[16] Ö. Andiç-Çakır, S. Hizal, Influence of elevated temperatures on the mechanical properties and microstructure of self-consolidating lightweight aggregate concrete. Construction and Building Materials, Vol. 34, pp.575-583, (2012).

DOI: 10.1016/j.conbuildmat.2012.02.088