Quantitative determination of phases in the alkali activation of fly ash. Part I. Potential ash reactivity

The various (vitreous and crystalline) components of two type F fly ashes are quantified in this paper using three techniques: chemical analysis with selective solutions, X-ray powder diffraction combined with the Rietveld method and nuclear magnetic resonance. The findings confirm the suitability o...

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Bibliographic Details
Published in:Fuel (Guildford) 2006-03, Vol.85 (5), p.625-634
Main Authors: Fernández-Jimenez, A., de la Torre, A.G., Palomo, A., López-Olmo, G., Alonso, M.M., Aranda, M.A.G.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fly ash
Installations for energy generation and conversion: thermal and electrical energy
NMR-MAS
Rietveld
Thermal power plants
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Summary:The various (vitreous and crystalline) components of two type F fly ashes are quantified in this paper using three techniques: chemical analysis with selective solutions, X-ray powder diffraction combined with the Rietveld method and nuclear magnetic resonance. The findings confirm the suitability of the techniques to pursue the objectives while providing further insight into the chemical composition of the vitreous phase of the ash as well as an understanding of the thermal history of these materials. Finally, the paper corroborates the grounds established in prior research for regarding the glassy constituents of an ash to be instrumental in the control of its alkali reactivity during the manufacture of ‘alkaline cements’.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2005.08.014