Concrete-Galvanized Steel Pull-Out Bond Assessed by Acoustic Emission
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 2
Abstract
This paper experimentally investigates the steel-to-concrete bond phenomenon in two kinds of deformed bars: black steel and hot-dip galvanized steel. The differences in the steel-to-concrete bond behavior are identified in terms of the load-slip curves and the acoustic emission (AE) patterns measured during pull-out tests. Test results show that the bond capacity and the initial stiffness of the bond stress–slip curve of black steel are approximately 20 and 50% greater, respectively, than those of galvanized steel, and the slip corresponding to the maximum bond stress is approximately 20% times larger in the latter. By measuring the AE activity, it is possible to identify the transitional points between the four stages characterizing interaction between the concrete and the bar subjected to pull-out force. Each transition coincides with a sudden drop in the AE activity.
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Acknowledgments
The authors would like to thank EUROTEGA S.A. for their help in preparing the galvanized bars. The authors appreciate the very significant contributions of José Rodriguez-Montero and José Luis Piqueras-Salas (University of Granada) and researchers José F. Gil-Villaverde and Victor Manuel Jiménez Moreno. This work received financial support from the local government of Spain, Consejería de Innovación, Ciencia y Tecnología, Project PE2012 TEP12 2429, and from the University of Granada, Spain, by “Plan Propio 2002-2003 de Investigación” under project numbers 30.PP.00.0700 and 30.PP.00.2900.This work also received support from the European Union (Fonds Européen de Dévelopment Régional).
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Information
Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Aug 19, 2014
Accepted: May 6, 2015
Published online: Jul 16, 2015
Discussion open until: Dec 16, 2015
Published in print: Feb 1, 2016
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