Galvanized Steel in Concrete: More Durable Structures Maintaining the Bond Length
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 8
Abstract
The main cause of the deterioration of concrete structures is the corrosion of their reinforcement. The use of galvanized steel rebars is a competitive solution to increase the service life of structures. The bond of galvanized rebars with concrete has been studied in recent years, but some of the results of different research on bond capacity are slightly contradictory. In this paper, a study of the surface geometry of traditional and galvanized rebars has been carried out to discover the influence of galvanizing on the bond capacity of reinforcement. Furthermore, the bond behavior of four reinforced concretes combining black and galvanized rebars along with ordinary portland cement (OPC) concrete and concrete containing blast furnace slag (BFS) has been assessed through pullout tests at different ages and limit states. The surface geometry of the rebars changed slightly because of galvanization. The bond tests at 7 days showed lower stresses when galvanized rebars and BFS were employed. At 28 days, similar anchorage lengths could be used for the design regardless of the type of reinforcement and concrete employed. However, slight differences were noticed depending on the limit states analyzed.
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Acknowledgments
The authors would like to thank Ministerio de Economía y Competitividad for financing the research project (IMCORPRO BIA2011-22670) and especially Javier Luna for the funds (BES-2012-061300). The authors would also like to thank the suppliers of the raw materials. In addition, the authors would like to thank the technician Gabriel Rentero for his contribution to the pullout tests.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 8 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 25, 2016
Accepted: Dec 1, 2016
Published online: Mar 30, 2017
Published in print: Aug 1, 2017
Discussion open until: Aug 30, 2017
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