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Preliminary study of effect of LiNO2 on expansion of mortars subjected to alkali-silica reaction

✍ Scribed by Bian Qinghan; S. Nishibayashi; Wu Xuequan; A. Yoshino; Zhu Hong; Wang Tiecheng; Tang Mingshu

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
563 KB
Volume
25
Category
Article
ISSN
0008-8846

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✦ Synopsis

The effect of LiNOz on the expansion of mortars made completely of reactive aggregate with five particle size fractions was investigated by means of an autoclave test. The results show that the effect of LiNOz varies with its content and NazO level, or more specifically, with the molar ratio of Li/Na in mortars. When the ratio reaches 0.8 at higher NazO level (greater than 2% in this study), ASR expansion is substantially suppressed and the ratio below or beyond this value will give different results. For the other cases of lower NazO levels the results are distinguished from this and the best Li/Na molar ratios of 0.1, 0.3 and 0.5 corresponding to the NazO levels of 0.5, 1.0 and 1.5%, respectively, are recommended.

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