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Setting of alkali-activated slag cement. Influence of activator nature
Abstract
The objective of this work was to determine the mechanisms that govern the setting times of alkali-activated slag (AAS) cement pastes, as a function of the nature of the alkaline activator used. For this purpose three different activators were used: waterglass (Na2SiO2.nHaOH with a SiO2/NaO ratio equal 1·5), NaOH and Na2CO3. The concentration of all solutions was constant = 3% of Na2O by mass of the slag. The pastes were studied through isothermal conduction calorimetry, FTIR and 29Si and 27Al MAS-NMR. Results indicate that pastes activated with waterglass develop faster setting due to the formation of an initial calcium silicate hydrate. Setting, in pastes activated with NaOH is due to the formation of a more polymerised calcium silicate hydrate. Pastes activated with Na2CO3 show longer setting times due to the initial formation of a sodium calcium carbonate which retard the reaction processes.
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Cited by
Ben Haha, M., Le Saout, G., Winnefeld, F., & Lothenbach, B. (2011) · Cement and Concrete Research · doi:10.1016/j.cemconres.2010.11.016 · Cited by 1,059
Haha, M. B., Lothenbach, B., Le Saout, G., & Winnefeld, F. (2011) · Cement and Concrete Research · doi:10.1016/j.cemconres.2011.05.002 · Cited by 914
Evolution of binder structure in sodium silicate-activated slag-metakaolin blends
Bernal, S. A., Provis, J. L., Rose, V., & Mejía de Gutierrez, R. (2011) · Cement and Concrete Composites · doi:10.1016/j.cemconcomp.2010.09.004 · Cited by 786
Influence of activator on the strength and drying shrinkage of alkali-activated slag mortar
Duran Atiş, C., Bilim, C., Çelik, Ö., & Karahan, O. (2009) · Construction and Building Materials · doi:10.1016/j.conbuildmat.2007.10.011 · Cited by 658
Haha, M. B., Lothenbach, B., Le Saout, G., & Winnefeld, F. (2012) · Cement and Concrete Research · doi:10.1016/j.cemconres.2011.08.005 · Cited by 580
Metadata
- Authors
- Fernandez-Jimenez, A., & Puertas, F.
- Venue
- Advances in Cement Research
- Publisher
- Emerald
- Published
- 2001-07
- Volume
- 13
- Issue
- 3
- Pages
- 115-121
- ISSN
- 0951-7197 (ISSN-L)
- OpenAlex
- W1998227695
- Cited by
- 231
- References
- 0
- FWCI
- 3.74
- Type
- journal article
- Language
- en
- Open access
- closed
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- Fernandez-Jimenez, A., & Puertas, F. (2001). Setting of alkali-activated slag cement. Influence of activator nature. Advances in Cement Research. https://doi.org/10.1680/adcr.13.3.115.39288
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