Deterioration of Bond Integrity between Repair Material and Concrete due to Thermal and Mechanical Incompatibilities
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 2
Abstract
The slant shear test highlighted by British Standard 6319 No. 4 was used to evaluate the bond strength between selected repair materials and parent concrete. Seven resinous and six cementitious repair materials were used to repair fractured specimens. Repaired test specimens were aged by subjecting them to heat-cool cycles that simulated repeated extreme summer day in the southern part of the United States (e.g., Mississippi). The results of thermal cycling showed a strong correlation between the difference in the coefficient of thermal expansions, as well as the difference in elastic moduli, between repair materials and concrete, and the reduction in bond strength. Although resinous materials possessed a higher bond strength to concrete, they showed higher reduction of bond strength than cementitious materials.
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Acknowledgments
The writers would like to acknowledge support of this project by the Mississippi Department of Transportation Study Number 169.
References
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© 2010 ASCE.
History
Received: Jan 4, 2007
Accepted: Sep 25, 2009
Published online: Jan 15, 2010
Published in print: Feb 2010
Notes
Note. Associate Editor: Kolluru V. Subramanian
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