Abstract
Geopolymer concretes are currently being commercialised in Australia and elsewhere around the world, with a view towards enhancing the sustainability of the world’s construction industry. The fundamental geopolymer binder is an aluminosilicate gel which displays key structural features on every length scale from Ångstroms up to centimetres, meaning that multiscale analysis is key to the development of a detailed understanding of geopolymer formation and performance. Here, we present results from investigations of geopolymer nanostructure, focusing on the use of infrared spectroscopy as an analytical tool. The effects of different combinations of precursors in geopolymer formation provides critical information, in particular with regard to the rate of reaction and its impact on the final distribution of elements and structures within the geopolymer binder. Formulations are designed so that the same composition is obtained by the use of precursors which release their constituent elements at very different rates under alkaline attack during geopolymerisation, and this provides essential information regarding the role of different elements in forming strong and durable geopolymer structures. Seeding the geopolymer mixture with very low doses of oxide nanoparticles presents several unexpected effects, both in terms of reaction kinetics and also in altering the nature of the zeolitic crystallites formed within the predominantly X-ray amorphous geopolymer binder.
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References
Duxson, P., Provis, J.L., Lukey, G.C., van Deventer, J.S.J.: The role of inorganic polymer technology in the development of ’Green concrete’. Cem. Concr. Res. 37, 1590–1597 (2007)
Duxson, P., Fernández-Jiménez, A., Provis, J.L., et al.: Geopolymer technology: The current state of the art. J. Mater. Sci. (in press) (2007) DOI 10.1007/s10853-10006-10637-z
Provis, J.L., Lukey, G.C., van Deventer, J.S.J.: Do geopolymers actually contain nanocrystalline zeolites? A re-examination of existing results. Chem. Mater. 17, 3075–3085 (2005)
Provis, J.L., van Deventer, J.S.J.: Geopolymerisation kinetics. 2. Reaction kinetic modelling. Chem. Eng. Sci. 62, 2318–2329 (2007)
Rowles, M., O’Connor, B.: Chemical optimisation of the compressive strength of aluminosilicate geopolymers synthesised by sodium silicate activation of metakaolinite. J. Mater. Chem. 13, 1161–1165 (2003)
Rees, C.A., Provis, J.L., Lukey, G.C., van Deventer, J.S.J.: Attenuated total reflectance Fourier transform infrared analysis of fly ash geopolymer gel ageing. Langmuir 23, 8170–8179 (2007)
Rees, C.A., Provis, J.L., Lukey, G.C., van Deventer, J.S.J.: Geopolymer gel formation with seeded nucleation. Colloids Surf A 318, 97–105 (2008)
Hajimohammadi, A., Provis, J.L., Van Deventer, J.S.J.: One-part geopolymer mixes from geothermal silica and sodium aluminate. In: 2008 AIChE Annual Meeting, Philadelphia, PA (2008)
Keyte, L.M.: Ph.D. Thesis, University of Melbourne, Australia (2008)
Hajimohammadi, A., Provis, J.L., van Deventer, J.S.J.: One-part geopolymer mixes from geothermal silica and sodium aluminate. Ind. Eng. Chem. Res. 47, 9396–9405 (2008)
Barrer, R.M., Mainwaring, D.E.: Chemistry of soil minerals. Part XIII: Reactions of metakaolinite with single and mixed bases. J. Chem. Soc. Dalton Trans. 2534 (1972)
Baerlocher, C., Meier, W.M., Olson, D.H.: Atlas of Zeolite Framework Types, 5th edn. Elsevier, Amsterdam (2001)
Rees, C.A., Provis, J.L., Lukey, G.C., van Deventer, J.S.J.: In situ ATR-FTIR study of the early stages of fly ash geopolymer gel formation. Langmuir 23, 9076–9082 (2007)
Lloyd, R.R., Provis, J.L., van Deventer, J.S.J.: Microscopy and microanalysis of inorganic polymer cements. 2: The gel binder. J. Mater. Sci. (2009) (in press) DOI: 10.1007/s10853-10008-13078-z
Osswald, J., Fehr, K.T.: FTIR spectroscopic study on liquid silica solutions and nanoscale particle size determination. J. Mater. Sci. 41, 1335–1339 (2006)
Bell, R.J., Dean, P.: Atomic vibrations in vitreous silica. Discussions of the Faraday society 50, 55–61 (1970)
Moolenaar, R.J., Evans, J.C., McKeever, L.D.: The structure of the aluminate ion in solutions at high pH. J. Phys. Chem. 74, 3629–3638 (1970)
Sweet, J.R., White, W.B.: Study of sodium silicate glasses and liquids by infrared reflectance spectroscopy. Phys. Chem. Glass. 10, 246–251 (1969)
Roy, B.N.: Infrared spectroscopy of lead and alkaline-earth aluminosilicate glasses. J. Am. Ceram. Soc. 73, 846–855 (1990)
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Provis, J.L., Hajimohammadi, A., Rees, C.A., van Deventer, J.S.J. (2009). Analysing and Manipulating the Nanostructure of Geopolymers. In: Bittnar, Z., Bartos, P.J.M., Němeček, J., Šmilauer, V., Zeman, J. (eds) Nanotechnology in Construction 3. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00980-8_14
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DOI: https://doi.org/10.1007/978-3-642-00980-8_14
Publisher Name: Springer, Berlin, Heidelberg
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