Abstract
A practical alkali-reactive aggreagate—Beijing Aggregate—was used to test the long-term effectiveness of LiOH in inhibiting alkali-aggregate reaction expansion. In this paper, not only the most rigorous conditions, such as the mortar bars being cured at 80°C, for 3 years after autoclaved 24 hours at 150°C, but also the 20°C long-term curing condition, were designed. At these conditions, LiOH was also able to inhibit ASR expansion long-term effectively. Not only the relationship between molar ratio of n(Li)/n(Na) and the alkali contents in systems was established, but also the governing mechanism of such effects was also studied by SEM and EDS.
Résumé
Un granulat pratique réactif à l'alcali nommé »Granulat de Pékin» est utilisé pour tester l'efficacité à long terme du LiOH en empêchant l'expansion de la réaction alcali-granulat. Cette étude a exposé non seulement les conditions les plus dures telles que l'autoclavage du mortier à 150°C pendant 24 heures et le séchage à 80°C, durant 3 ans, mais aussi les conditions de protection durable à 20°C. Cette étude établit aussi une relation entre la proportion molaire de Li/Na et le contenu d'alcali dans les systèmes. La recherche des effets mentionnés ci-dessus a été effectuée à l'aide d'un microscope à balayage électronique et d'un spectromètre à énergie dispersive.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Mo, X.Y., Lu, D.Y. and Xu, Z.Z., ‘Mechanism of chemical admixtures in inhibiting alkali-silica reaction and its research progress’,Journal of Nanjing University of Chemical Technology 22 (3) (2000) 72–77.
McCoy, W.J. and Caldwell, A.G., ‘New approach to inhibiting alkali-aggregate expansion’,J. Amer. Concr. Inst. Proc. 22 (9) (1951) 693–706.
Mo, X.Y., ‘Long-term effectiveness and mechanisms of chemical admixtures in inhibiting Alkali-Silica Reaction’, Ph.D. thesis, College of Materials Science and Engineering, Nanjing University of Chemical Technology, 2001.
Stokes, D.B., Manissero, C.E., Roy, D.M.et al., ‘Portland cement manufacture containing lithium for ASR control’, in Proc. 11th Inter. Conf. on AAR in Concrete, 2000 (CSIRO Division of Building Construction and Engineering, Australia, 2000), 773–781.
Baxter, S.Z., Stokes, D.B. and Manissero, C.E., ‘A lithium-based pozzolan for ASR control’, in Proc. 11th Inter. Conf. on AAR in Concrete, Australia, Oct. 2000 (CSIRO Division of Building Construction and Engineering, Australia, 2000) 573–582.
Whitmore, D., Abbott, S. ‘Use of an applied electric field to drive lithium ions into alkali-silica reactive structures’, In: Proc. 11th Inter. Conf. on AAR in Concrete, Australia, Oct. 2000 (CSIRO Division of Building Construction and Engineering, Australia, 2000) 1089–1098.
Johnston, D.P., Surdahl, R. and Stokes, D.B., ‘A case study of a lithium-based treatment of an ASR-affected pavement’, In: Proc. 11th Inter. Conf. on AAR in Concrete, Australia, Oct. 2000 (CSIRO Division of Building Construction and Engineering Australia, 2000) 1149–11581.
The standard of the Association of Chinese Construction Standardization, ‘A Rapid Test Method for Determining the Alkali Reactivity of Sands and Rocks’, (Beijing, China: the Association of Chinese Construction Standardization, 1995).
Mo, X.Y. and Xu, Z.Z., ‘Studies on the long-term effect of lithium compounds on Alkali-Silica Reaction’,Journal of the Chinese Ceramic Society 28 (2) (2000) 123–127, 138.
Lumley, J.S, ‘ASR suppression by lithium compounds’,Cem. Concr. Res. 27 (2) (1997) 235–244.
Ramachandran, V.S., ‘Alkali-aggregate expansion inhibiting admixtures’,Cem. Concr. Comp. 20 (1998) 149–161.
Mo, X.Y. and Xu, Z.Z., ‘Investigations of lithium compounds in inhibiting Alkali-Silica Reaction at high temterature’,Journal of the Chinese Ceramic Society 28 (6) (2000) 578–582.
Diamond, S., ‘Unique response of LiNO3 as an alkali silica reaction-preventive admixture’,Cem. Concr. Res. 29 (1999) 1271–1275.
Author information
Authors and Affiliations
Additional information
Editorial Note Prof. Tang Mingshu is a RILEM Senior Member. He participates in the work of RILEM TC 191-ARP ‘Alkali-reactivity and prevention-Assessment, specification and diagnosis of alkali-reactivity’.
Rights and permissions
About this article
Cite this article
Mo, I.X.Y., Xu, Z.Z., Wu, K.R. et al. Effectiveness of LiOH in inhibiting alkali-aggregate reaction and its mechanism. Mat. Struct. 38, 57–61 (2005). https://doi.org/10.1007/BF02480575
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02480575