Bonding strength of stainless steel rebars in concretes exposed to marine environments
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2018-05-30
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Abstract
Many studies have corroborated the use of Stainless Steel Reinforcements (SSR) for structures in corrosive environments. However, even though the conditions for their employment are specified in different standards, their use is always tied to the same requirements for standard carbon steel rebars (B500SD), among which an equivalent carbon content for weldability that is inappropriate for SSR. Further studies are therefore needed to develop suitable standards that will focus on addressing not only the content, but also the technical advantages of SSR for structural engineering under specific conditions. The results of this study show improvements in the maximum bond strength behaviour of different SSRs in simulated marine environments, in comparison with B500SD, in terms of several variables: Bond index, curing time, w/c ratio, and corrosion. Specifically, the test results showed that: (a) the Bond index was not a suitable parameter for the evaluation of the bonding strength of SSR; (b) the curing time increased the bonding strength of Lean Duplex Stainless Steel (LDSS); (c) a higher w/c ratio tended to decrease bond strength, although less so in LDSS; and, (d) corrosion reduced bond strength, especially in B500SD.
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Publisher Copyright: © 2018 Elsevier Ltd
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Bond strength , Corrosion , Stainless steel rebar , Chlorides , Bond strength , Corrosion , Stainless steel rebar , Chlorides , Civil and Structural Engineering , Building and Construction , General Materials Science , Funding Info , The tests presented in this manuscript were performed as part of the IISIS: ‘‘Investigación Integrada en Islas Sostenibles” (Integrated research in Sustainable Islands) research project, in receipt of funding from the Centre for the Development of Industrial Technology (CDTI) and the Technological Fund, part of the Spanish Ministry of Industry, through the INNPRONTA research programme. _x000D_ The authors would also like to thank Research Group IT781-13 ‘‘Comprehensive sustainability in building systems and materials”, at the University of the Basque Country, for scientific assistance and support. Finally, we are also especially thankful to ACERINOX EUROPA (part of the ACERINOX Group) for funding the IISIS project, supplying the necessary rebar samples for testing, and particularly to Rafael Sanchez and Julia Contreras from Technical Dpt./Labs for providing their expertise and for their commitment that have greatly assisted our research , The tests presented in this manuscript were performed as part of the IISIS: ‘‘Investigación Integrada en Islas Sostenibles” (Integrated research in Sustainable Islands) research project, in receipt of funding from the Centre for the Development of Industrial Technology (CDTI) and the Technological Fund, part of the Spanish Ministry of Industry, through the INNPRONTA research programme. _x000D_ The authors would also like to thank Research Group IT781-13 ‘‘Comprehensive sustainability in building systems and materials”, at the University of the Basque Country, for scientific assistance and support. Finally, we are also especially thankful to ACERINOX EUROPA (part of the ACERINOX Group) for funding the IISIS project, supplying the necessary rebar samples for testing, and particularly to Rafael Sanchez and Julia Contreras from Technical Dpt./Labs for providing their expertise and for their commitment that have greatly assisted our research
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Calderon-Uriszar-Aldaca , I , Briz , E , Larrinaga , P & Garcia , H 2018 , ' Bonding strength of stainless steel rebars in concretes exposed to marine environments ' , Construction and Building Materials , vol. 172 , pp. 125-133 . https://doi.org/10.1016/j.conbuildmat.2018.03.156