CRYSTALLINE PHASE REACTIVITY IN THE SYNTHESIS OF FLY ASH-BASED GEOPOLYMER

https://doi.org/10.22146/ijc.21426

Lukman Atmaja(1*), Hamzah Fansuri(2), Anggaria Maharani(3)

(1) Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS), Kampus ITS, Keputih, Sukolilo, Surabaya, 60111
(2) Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS), Kampus ITS, Keputih, Sukolilo, Surabaya, 60111
(3) Department of Chemistry, Institut Teknologi Sepuluh Nopember (ITS), Kampus ITS, Keputih, Sukolilo, Surabaya, 60111
(*) Corresponding Author

Abstract


Aluminosilicate, alkaline solution and fly ash from a power plant have been used to synthesize geopolymer at ambient temperature. SiO2/Al2O3 mole ratio of the starting materials was varied by the addition of pure, insoluble corundum and quartz. The geopolymer exhibited some differences in the ratio of initial reaction mixtures and that of final products. The corundum gave no influence to the compressive strength while the quartz at SiO2/Al2O3=4.0-6.0 produced significant change in the strength. The highest compressive strength achieved was 65 MPa. XRD using analysis Rietveld method proved that quartz has been found both in starting materials as well as in the geopolymer indicating the involvement of crystalline phases, to some extent, in geopolymerization process.


Keywords


geopolymers; fly ash; alumina-silica; crystalline phase reactivity

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References

[1]   Kim, B., and Prezzi, M., 2008, Waste Manag., 28, 3, 649–659.

[2]   Kong, D.L.Y., Sanjayan, J.G., and Crentsil, K.S., 2007, Cem. Concr. Res., 37, 12, 1583–1589.

[3]   Fletcher, A.R., MacKenzie, K.J.D., Nicholson, L.C., and Shimada, S., 2005, J. Eur. Ceram. Soc., 25, 9, 1471–1477.

[4]   Xu, H., and van Deventer, J.S.J., 2000, Int. J. Miner. Process., 59, 247–266.

[5]   Xu, H., and van Deventer, J.S.J., 2002, Cem. Concr. Res., 32, 11, 1705–1716.

[6]   Phair, J.W., 2001, Compositional effect and microstructure of fly ash-based geopolymers, Ph.D. Thesis, Department of Chemical Engineering, University of Melbourne, Victoria, Australia.

[7]   Duxson, P., Provis, J.l., Mallicoat, S.W., Lukey, G.C., Kriven, W.M., and van Deventer, J.S.J., 2005, Colloids Surf., A, 269, 1-3, 47–58.

[8]   Winburn, R., 2003, Adv. X-Ray Anal., 46, 210–219.

[9]   Xu, H., and van Deventer, J.S.J., 2002, Miner. Eng., 15, 12, 1131–1139.



DOI: https://doi.org/10.22146/ijc.21426

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Indonesian Journal of Chemistry (ISSN 1411-9420 / 2460-1578) - Chemistry Department, Universitas Gadjah Mada, Indonesia.

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