Estimation of the Residual Expansion of Concrete Affected by Alkali Silica Reaction
Publication: Journal of Materials in Civil Engineering
Volume 20, Issue 1
Abstract
An experimental research program was carried out in order to validate a methodology for the mechanical assessment of structures damaged by alkali-silica reaction (ASR). Long-term deformations of specimens kept under varied environments were measured. Results were collected according to the French methodology for measuring residual expansion, on cores drilled from cylinders and prisms made of the same concrete materials. Numerous testing conditions were intended to check the experimental robustness of the most significant input data for structural assessment. It appears that omitting the measured expansion of the specimens during a rather long period , as presently recommended, can lead to an unsafe estimation of ASR-residual expansions, especially when the core is drilled during the active phase of ASR development. The strains of the specimens during the first days of the test are caused by the superimposition of concrete expansion due to water sorption and additional ASR expansions. Evolutions and improved conditions of application relative to the French standard method for estimating residual expansion of ASR-affected concrete are proposed.
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Acknowledgments
The writers are pleased to thank the team of technicians at LCPC who participated in this study, and particularly J. Billo and M. Estivin for their participation in numerous measurements. They thank H. Tournier, E. Bourdarot, A. Jeanpierre, and D. Chauvel (from EDF) for their help in supporting and following the project, and C. Larive (presently at CETU, Lyon, France) for the instigation of this project.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 20 • Issue 1 • January 2008
Pages: 54 - 62
Copyright
© 2008 ASCE.
History
Received: May 4, 2005
Accepted: Aug 12, 2005
Published online: Jan 1, 2008
Published in print: Jan 2008
Notes
Note. Associate Editor: Chiara F. Ferraris
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