Corrosion Degree Effect on Nominal and Effective Strengths of Naturally Corroded Reinforcement
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 10
Abstract
This paper presents the corrosion degree effect on yield and ultimate strengths (nominal and effective) of protruding reinforcing steel that remained buried for 60 years; thus, the natural corrosion process during this period was analyzed. Tensile tests were performed on specimens taken from this protruding reinforcing steel. A characterization of the local soil where the reinforcement remained buried as an aggressive medium was performed, and micrographs were obtained in order to observe the presence of pits. The results were in agreement with studies of accelerated corrosion in a laboratory. As the corrosion degree increases, the greater is the difference between the nominal and effective strengths. Specimens with a corrosion degree of about 25% had an effective strength similar to specimens with lower corrosion degrees. Thus, care must be taken in interpreting the effective strengths for predicting the capabilities of structural elements degraded by corrosion.
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Acknowledgments
The authors thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), the Technological Institute of Aeronautics (ITA) for providing the necessary infrastructure, and Professor Ph.D. Marcelo De Julio in memoriam.
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 10 • October 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Oct 2, 2015
Accepted: Jan 20, 2016
Published online: May 5, 2016
Published in print: Oct 1, 2016
Discussion open until: Oct 5, 2016
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