Corrosion resistance of steel fibre reinforced concrete – a literature review

Victor Marcos Meson, Alexander Michel, Anders Solgaard, Gregor Fischer, Carola Edvardsen, Torben Lund Skovhus

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Abstract

Steel fibre reinforced concrete (SFRC) is increasingly being used in the construction of prefabricated segmental linings for bored tunnels, since it entails simplified production processes and higher quality standards. However, international standards and guidelines are not consistent regarding the consideration of steel fibres for the structural verification of SFRC elements exposed to corrosive environments, hampering the development of civil infrastructure built of SFRC. In particular, the long-term effect of exposure to chlorides is in focus and under discussion. This paper reviews the existing literature concerning chloride-induced corrosion on steel fibres, as well as the impact of steel fibre corrosion on the residual-tensile strength of SFRC. The review confirms the agreement among academics and regulators regarding the superior durability of un-cracked SFRC exposed to chlorides, relative to conventional reinforcement. However, the durability of cracked SFRC is still under discussion, as the mechanisms governing the corrosion of carbon-steel fibres in cracks and its effects on the fracture behaviour of SFRC are still unclear. Nevertheless, there is insight among several researchers concerning the existence of a critical crack width, below 0.20 mm, where corrosion of carbon-steel fibres is not critical and the structural integrity of the exposed SFRC can be ensured over the long-term. A doctoral project investigating chloride-induced corrosion of steel fibres on cracked SFRC has been initiated, in order to explore the governing deterioration mechanisms.
Original languageEnglish
Title of host publicationfib Symposium 2016: Performance-based approaches for concrete structures : Proceedings
Number of pages13
Publication date2016
Publication statusPublished - 2016
Event fib Symposium 2016: Performance-based approaches for concrete structures - Cape Town, South Africa
Duration: 21 Nov 201623 Nov 2016

Conference

Conference fib Symposium 2016
CountrySouth Africa
CityCape Town
Period21/11/201623/11/2016

Keywords

  • Carbon Steel Fibre Reinforced Concrete
  • SFRC
  • Corrosion Mechanisms
  • Chlorides
  • Cracks

Cite this

Marcos Meson, V., Michel, A., Solgaard, A., Fischer, G., Edvardsen, C., & Skovhus, T. L. (2016). Corrosion resistance of steel fibre reinforced concrete – a literature review. In fib Symposium 2016: Performance-based approaches for concrete structures: Proceedings