Chemomechanical Assessment of Beams Damaged by Alkali-Silica Reaction
Publication: Journal of Materials in Civil Engineering
Volume 18, Issue 4
Abstract
The alkali-silica reaction (ASR) is a chemical reaction that causes expansions and unexpected deformations of concrete structures. A methodology of assessment of ASR-damaged structures is required in order to evaluate their structural stability. Chemomechanical calculations have been performed in order to investigate the assumption of modeling ASR-induced expansions as imposed strains. The input data for the model comprises the moisture distribution in the damaged structures, ASR-induced potential strains, and the influence of ASR on the concrete mechanical properties. The results of calculations have been compared with experimental data obtained from ASR-damaged beam specimens. The role of water supply and reinforcement has been analyzed in comparing the deformations of plain and reinforced concrete beams subjected to a moisture gradient. Calculations show that cracking and compressive stresses (here induced by steel reinforcement) have a large influence on the anisotropy of the ASR swellings. This induced anisotropy is shown to be one of the main factors that should be considered while predicting the mechanical behavior of ASR-damaged structures.
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Acknowledgments
The writers are pleased to thank S. Prené, H. Tournier, E. Bourdarot, A. Jeanpierre, and D. Chauvel (EDF) for their help in analysis. They also thank particularly B. Godart and T. Kretz (LCPC) for their ideas for investigation.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 18 • Issue 4 • August 2006
Pages: 500 - 509
Copyright
© 2006 ASCE.
History
Received: Jul 19, 2004
Accepted: Jul 6, 2005
Published online: Aug 1, 2006
Published in print: Aug 2006
Notes
Note. Associate Editor: Kolluru V. Subramaniam
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