Effectiveness of LiOH in inhibiting alkali-aggregate reaction and its mechanism |
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| Authors: | I. X. Y. Mo Z. Z. Xu K. R. Wu M. S. Tang |
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| Affiliation: | (1) Analysis and Testing Center & Materials Science Laboratory, Nanjing Normal University, 210097 Nanjing, P.R.China;(2) College of Materials Science and Engineering, Nahjing University of Technology, 210009 Nanjing, P.R.China;(3) School of Materials Science and Engineering, Tongji University, 200092 Shanghai, P.R.China |
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| 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. |
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