Geopolymer synthesis using silica fume and sodium aluminate

Monoliths that set rapidly and harden at ambient temperature have been prepared by exploiting sol–gel type condensation reactions between sodium silicate, formed in-situ by alkaline dissolution of silica fume, and a solution of sodium aluminate. Structural characterisation of the product was carried...

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Bibliographic Details
Published in:Journal of materials science 2007-06, Vol.42 (11), p.3990-3993
Main Authors: BREW, D. R. M, MACKENZIE, K. J. D
Format: Article
Language:English
Subjects:
Aluminosilicates
Aluminum silicates
Ambient temperature
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Condensates
Exact sciences and technology
General and physical chemistry
Geopolymers
Materials science
NMR spectroscopy
Silica fume
Silicon dioxide
Sodium aluminate
Sodium silicates
Sol gel process
Sol-gel processes
Synthesis
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Summary:Monoliths that set rapidly and harden at ambient temperature have been prepared by exploiting sol–gel type condensation reactions between sodium silicate, formed in-situ by alkaline dissolution of silica fume, and a solution of sodium aluminate. Structural characterisation of the product was carried out by XRD, 27Al and 29Si MAS NMR spectroscopy) and the samples showed reproducibly good compressive strengths, indicating that the products display all the characteristics of typical aluminosilicate geopolymers.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-006-0376-1