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Título: | Alkaline Activation of Fly Ashes: NMR Study of the Reaction Products |
Autor: | Palomo, Ángel CSIC ORCID; Fernández-Jiménez, Ana CSIC ORCID ; Alonso, S.; Sobrados, Isabel CSIC ORCID; Sanz Lázaro, Jesús CSIC ORCID | Palabras clave: | fly ash Alkaline earths Nuclear magnetic resonance |
Fecha de publicación: | jun-2004 | Editor: | John Wiley & Sons | Citación: | Journal of the American Ceramic Society 87(6): 1141–1145(2004) | Resumen: | Reaction products formed during alkaline activation, with 8M NaOH solutions, of fly ashes have been characterized with 29Si and 27Al magic-angle spinning nuclear magnetic resonance (MASNMR) spectroscopy. In particular, the influence of curing conditions (time and temperature of reaction) has been analyzed. NMR results show the formation of amorphous tecto-silicates in which the amount of aluminum decreases in the two consecutive formed phases. The Si/Al ratio of zeolite precursor obtained at 85°C changes from 0.95 to 1.86 when curing time is increased from 5 h to 1 week. The evolution of the mechanical properties of prepared cements has also been discussed in terms of the phases formed and texture and morphology of samples. | Versión del editor: | http://dx.doi.org/10.1111/j.1551-2916.2004.01141.x/abstract | URI: | http://hdl.handle.net/10261/32168 | DOI: | 10.1111/j.1551-2916.2004.01141.x | E-ISSN: | 1551-2916 |
Aparece en las colecciones: | (IETCC) Artículos |
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