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Alkaline Activation of Fly Ashes: NMR Study of the Reaction Products
Abstract
Reaction products formed during alkaline activation, with 8 M N a OH solutions, of fly ashes have been characterized with 29 Si and 27 Al 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.
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Cited by
Geopolymer technology: The current state of the art
Duxson, P., Fernández-Jiménez, A., Provis, J. L., Lukey, G. C., Palomo, A., & van Deventer, J. S. J. (2007) · Journal of Materials Science · doi:10.1007/s10853-006-0637-z · Cited by 4,742
New cements for the 21st century: The pursuit of an alternative to Portland cement
Shi, C., Jiménez, A. F., & Palomo, A. (2011) · Cement and Concrete Research · doi:10.1016/j.cemconres.2011.03.016 · Cited by 1,691
Bernal, S. A., Provis, J. L., Walkley, B., San Nicolas, R., Gehman, J. D., Brice, D. G., Kilcullen, A. R., Duxson, P., & van Deventer, J. S. J. (2013) · Cement and Concrete Research · doi:10.1016/j.cemconres.2013.06.007 · Cited by 1,019
Reaction mechanisms in the geopolymeric conversion of inorganic waste to useful products
van Deventer, J. S. J., Provis, J. L., Duxson, P., & Lukey, G. C. (2007) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2006.02.044 · Cited by 580
Durability of Alkali‐Activated Materials: Progress and Perspectives
Bernal, S. A., & Provis, J. L. (2014) · Journal of the American Ceramic Society · doi:10.1111/jace.12831 · Cited by 547
Metadata
- Authors
- Palomo, Á., Alonso, S., Fernandez‐Jiménez, A., Sobrados, I., & Sanz, J.
- Venue
- Journal of the American Ceramic Society
- Publisher
- Wiley
- Published
- 2004-06
- Volume
- 87
- Issue
- 6
- Pages
- 1141-1145
- ISSN
- 0002-7820 (ISSN-L)
- 1551-2916
- OpenAlex
- W1992469583
- Cited by
- 463
- References
- 0
- FWCI
- 70.85
- Type
- journal article
- Language
- en
- Open access
- closed
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- Palomo, Á., Alonso, S., Fernandez‐Jiménez, A., Sobrados, I., & Sanz, J. (2004). Alkaline Activation of Fly Ashes: NMR Study of the Reaction Products. Journal of the American Ceramic Society. https://doi.org/10.1111/j.1551-2916.2004.01141.x
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