Alkali-silica and alkali-silicate reactivity in slates
DOI:
https://doi.org/10.3989/egeol.40143.094Keywords:
Reactivity of slate, Cements, Alkali, Silica, SilicateAbstract
In this paper it is studied the reactivity of the slates with alkali hydroxides released by the cements in concretes and mortars. For this purpose several essays were performed under different conditions to a selection of slates of different origins and composition. It has been shown that all the tested slates are susceptible to alkali-silica and alkali-silicate reactivity with the alkalis of the cement and that not all the tests routinely performed to detect such reactions are reliable. Verified the reactivity of these rocks, the causes of observed behaviours and the possibilities to minimize or eliminate this reactivity are studied so that the slates could be in use in contact with cement in composite materials. The use of pozzolanic cements turns out to be effective for the elimination of this type of reactions.
Downloads
References
Dent Glasser, L.S. & Kataoka, N. (1981). The chemistry of alkali-aggregate reaction. Cement and Concrete Research, 11: 1-9. doi:10.1016/0008-8846(81)90003-X
Fournier, B. & Bérubé, M.A. (2000). Alkali-aggregate reaction in concrete: a review of basic concepts and engineering implications. Journal of Civil Engineering, 27: 167-191. doi:10.1139/cjce-27-2-167
García-Lodeiro, I.; Palomo, A. & Fernández-Jiménez, A. (2007). Alkali-aggregate reaction in activated fly ash systems. Cement and Concrete Research, 37: 175-183. doi:10.1016/j.cemconres.2006.11.002
Herrador, M.F.; Martínez-Abella, F. & Rabuñal Dopico, J.R. (2208). Experimental evaluation of expansive behaviour of an old-aged ASR-affected dam concrete: methodology and application. Materials and Structures, 41: 173-188. doi:10.1617/s11527-007-9228-y
Ichikawa, T & Miura, M. (2007). Modified model of alkali-silica reaction. Cement and Concrete Research, 37: 1291-1297. doi:10.1016/j.cemconres.2007.06.008
Menéndez, E. & Soriano, J. (2007). Procesos expansivos del hormigón: ensayos árido-álcali, ataque por sulfatos, hielo deshielo. Sistemas de prevención y actuaciones. Curso de Estudios Mayores de la Construcción, 17 edición. Instituto Eduardo Torroja, CSIC, Madrid.
Sánchez-Soto, P.J.; Ruiz-Conde, A.; Bono, R.; Raigón, M. & Garzón, E. (2007). Thermal evolution of a slate. Journal of Thermal Analysis and Calorimetry, 90: 133-141. doi:10.1007/s10973-007-7751-2
Stanton, T.E. (1948). Correlation of laboratory tests with field experiences of excessive concrete expansion induced by a reaction between the cement and aggregate. Proceedings of the American Society for Testing and Materials, 48: 1057-1066.
Walsh, J.A. (2007). The use of the scanning electron microscope in the determination of the mineral composition of Ballachulish slate. Materials Characterization, 58: 10951103. doi:10.1016/j.matchar.2007.04.013
Yujiang, W.; Min, D. & Mingshu, T. (2008). Alkali release from aggregate and the effect on AAR expansion. Materials and Structures, 41: 159-171. doi:10.1617/s11527-007-9227-z
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2010 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.
© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.
