Pullout Behavior of Steel Fibers in Self-Compacting Concrete
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 1
Abstract
In steel fiber-reinforced composites materials, fiber and matrix are bonded together through a weak interface. The study of this interfacial behavior is important for understanding the mechanical behavior of such composites. Moreover, with the outcome of new composites materials with improved mechanical properties and advanced cement matrices, such in the case of steel fiber reinforced self-compacting concrete, the study of the fiber/matrix interface assumes a new interest. In the present work, experimental results of both straight and hooked-end steel fibers pullout tests on a self-compacting concrete medium are presented and discussed. Emphasis is given to the accurate acquirement of the pullout load versus end-slip relationship. The influence of fiber embedded length and orientation on the fiber pullout behavior is studied. Additionally, the separate assessment of the distinct bond mechanisms is performed, by isolating the adherence bond from the mechanical bond provided by the hook. Finally, analytical bond-slip relationships are obtained by back-analysis procedure with an interfacial cohesive model.
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Acknowledgments
The study reported in this paper is part of the research program PABERPRO-Conception and implementation of a production system of prefabricated sandwich steel fiber reinforced panels supported by POCI 2010-IDEIA, Project No. UNSPECIFIED13-05-04-FDR-00007, contract reference ADI/2007/V4.1/0049. This project involves the Companies PREGAIA and CIVITEST, and the University of Minho. The writers wish to acknowledge the materials generously supplied by Bekaert (fibers), SECIL (cement), Degussa (superplasticizer), and Comital (limestone filler). The first writer wishes also to acknowledge the Grant No. UNSPECIFIEDSFRH/BD/18002/2004, provided by FCT.UNSPECIFIED
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Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 1 • January 2010
Pages: 1 - 9
Copyright
© 2010 ASCE.
History
Received: Aug 18, 2008
Accepted: Feb 18, 2009
Published online: Mar 26, 2009
Published in print: Jan 2010
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