Optimising an expansion test for the assessment of alkali-silica reaction in concrete structures

被引：0
作者：
Xiao Xiao Gao
Stéphane Multon
Martin Cyr
Alain Sellier
机构：
[1] Université de Toulouse,
[2] UPS,undefined
[3] INSA,undefined
[4] LMDC (Laboratoire Matériaux et Durabilité des Constructions),undefined
来源：
Materials and Structures | 2011年 / 44卷
关键词：
Alkali; silica reaction (ASR); Expansion test; Aggregate size; Specimen size; Scale effect;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This work is part of an overall project for the reassessment of concrete structures damaged by alkali-silica reaction (ASR). The paper focuses on developing a laboratory method for expansion tests since the usual tests appear to be difficult to use in expert assessment. The development involves optimising the storage conditions and the sizes of the specimen and aggregate. A combined effect of the aggregate and specimen sizes on ASR expansion is thus pointed out: for a given mortar, the expansion is lower in small specimens than in large specimens. Therefore, the ratio ‘specimen size/aggregate size’ has to be sufficiently high to decrease this scale effect and obtain relevant measurements. The discussion proposes a method for always using comparable conditions during the expansion tests and finally suggests how this test can be optimised to provide fast and relevant results for use in structure reassessment.
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页码：1641 / 1653
页数：12
相关论文
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