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Mechanical Performance of Fly-Ash-Based Green Geopolymer Composites Subjected to Elevated Temperatures
Corresponding Author(s) : S. Choi
Asian Journal of Chemistry,
Vol. 26 No. 17 (2014): Vol 26 Issue 17
Abstract
This paper discusses the effect of Na2O content, SiO2/Na2O mole ratio and elevated temperature on the mechanical performance of fly-ash-based inorganic green geopolymer composites. Fly-ash-based geopolymers, which were manufactured with varying alkali contents (4-8 % of fly ash weight) and SiO2/Na2O mole ratios (0.6-1.4), were subjected to elevated temperatures up to 900 ºC. The geopolymer composites and their performance were evaluated on the basis of weight loss and strength loss after temperature exposure. In addition, mineralogical changes due to the elevated temperature exposure were studied using X-ray diffraction. Investigation of microstructures as well as microprobe analysis was performed using scanning electron microscopy, Fourier-transform infrared spectroscopy and mercury intrusion porosimetry. The results showed that the fly-ash-based geopolymer responded significantly to high temperature conditions.
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- M. Xue, Y. Heichal, S. Chandra and J. Mostaghimi, J. Mater. Sci., 42, 9 (2007); doi:10.1007/s10853-006-1129-x.
- A. Palomo, M.W. Grutzeck and M.T. Blanco, Cement Concr. Res., 29, 1323 (1999); doi:10.1016/S0008-8846(98)00243-9.
- A. Fernández-Jiménez and A. Palomo, 11th International Congress on the Chemistry of Cement, Durban, South Africa, vol. 3 (2003).
- A. Fernández-Jiménez and A. Palomo, Fuel, 82, 2259 (2003); doi:10.1016/S0016-2361(03)00194-7.
- P.V. Krivenko, Alkaline cements Alkaline Cements and Concretes, VipolStock Company, Kiev, edn 1, pp. 11-129 (1994).
- A. Palomo, A. Fernández-Jiménez and M. Criado, Materiales de Construcción, 54, 77 (2004); doi:10.3989/mc.2004.v54.i275.249.
- M. Criado, A. Palomo and A. Fernández-Jiménez, Fuel, 84, 2048 (2005); doi:10.1016/j.fuel.2005.03.030.
- J.S.J. van Deventer, J.L. Provis, P. Duxson and G.C. Lukey, J. Hazard. Mater., 139, 506 (2007); doi:10.1016/j.jhazmat.2006.02.044.
- T. Bakharev, Cement Concr. Res., 36, 1134 (2006); doi:10.1016/j.cemconres.2006.03.022.
- D.L.Y. Kong and J.G. Sanjayan, Cem. Concr. Comp., 30, 986 (2008); doi:10.1016/j.cemconcomp.2008.08.001.
- D.L.Y. Kong and J.G. Sanjayan, Cement Concr. Res., 40, 334 (2010); doi:10.1016/j.cemconres.2009.10.017.
- D. Hardjito, S.E. Wallah, D.M.J. Sumajouw and B.V. Rangan, ACI Mater., 101, 6 (2004).
- D.N.J. Sumajouw, D. Hardjito, S.E. Wallah and B.V. Rangan, Geopolymer Concrete for a Sustainable Future Proceedings Green Processing 2004-2nd International Conference on the Sustainable Processing of Minerals, Freemantle, Australia (2004).
- D. Hardjito, S.E. Wallah, D.M.J. Sumajouw and B.V. Rangan, Brief Review of Development of Geopolymer Concrete Proceedings George Hoff Symposium on High Performance Concrete and Concrete for Marine Environment, Las Vegas, USA, pp. 63-72 (2004).
- X.L. Guo, H.S. Shi and W.A. Dick, Cement Concr. Comp., 32, 142 (2010); doi:10.1016/j.cemconcomp.2009.11.003.
References
M. Xue, Y. Heichal, S. Chandra and J. Mostaghimi, J. Mater. Sci., 42, 9 (2007); doi:10.1007/s10853-006-1129-x.
A. Palomo, M.W. Grutzeck and M.T. Blanco, Cement Concr. Res., 29, 1323 (1999); doi:10.1016/S0008-8846(98)00243-9.
A. Fernández-Jiménez and A. Palomo, 11th International Congress on the Chemistry of Cement, Durban, South Africa, vol. 3 (2003).
A. Fernández-Jiménez and A. Palomo, Fuel, 82, 2259 (2003); doi:10.1016/S0016-2361(03)00194-7.
P.V. Krivenko, Alkaline cements Alkaline Cements and Concretes, VipolStock Company, Kiev, edn 1, pp. 11-129 (1994).
A. Palomo, A. Fernández-Jiménez and M. Criado, Materiales de Construcción, 54, 77 (2004); doi:10.3989/mc.2004.v54.i275.249.
M. Criado, A. Palomo and A. Fernández-Jiménez, Fuel, 84, 2048 (2005); doi:10.1016/j.fuel.2005.03.030.
J.S.J. van Deventer, J.L. Provis, P. Duxson and G.C. Lukey, J. Hazard. Mater., 139, 506 (2007); doi:10.1016/j.jhazmat.2006.02.044.
T. Bakharev, Cement Concr. Res., 36, 1134 (2006); doi:10.1016/j.cemconres.2006.03.022.
D.L.Y. Kong and J.G. Sanjayan, Cem. Concr. Comp., 30, 986 (2008); doi:10.1016/j.cemconcomp.2008.08.001.
D.L.Y. Kong and J.G. Sanjayan, Cement Concr. Res., 40, 334 (2010); doi:10.1016/j.cemconres.2009.10.017.
D. Hardjito, S.E. Wallah, D.M.J. Sumajouw and B.V. Rangan, ACI Mater., 101, 6 (2004).
D.N.J. Sumajouw, D. Hardjito, S.E. Wallah and B.V. Rangan, Geopolymer Concrete for a Sustainable Future Proceedings Green Processing 2004-2nd International Conference on the Sustainable Processing of Minerals, Freemantle, Australia (2004).
D. Hardjito, S.E. Wallah, D.M.J. Sumajouw and B.V. Rangan, Brief Review of Development of Geopolymer Concrete Proceedings George Hoff Symposium on High Performance Concrete and Concrete for Marine Environment, Las Vegas, USA, pp. 63-72 (2004).
X.L. Guo, H.S. Shi and W.A. Dick, Cement Concr. Comp., 32, 142 (2010); doi:10.1016/j.cemconcomp.2009.11.003.