Methods for characterising the steel–concrete interface to enhance understanding of reinforcement corrosion: a critical review by RILEM TC 262-SCI - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Access content directly
Journal Articles Materials and structures Year : 2022

Methods for characterising the steel–concrete interface to enhance understanding of reinforcement corrosion: a critical review by RILEM TC 262-SCI

Hong Wong
Ueli Angst
  • Function : Author
Mette Geiker
  • Function : Author
O. Burkan Isgor
  • Function : Author
Bernhard Elsener
  • Function : Author
Alexander Michel
  • Function : Author
Maria Cruz Alonso
  • Function : Author
Maria Joao Correia
  • Function : Author
Jose Pacheco
  • Function : Author
Joost Gulikers
  • Function : Author
Yuxi Zhao
Maria Criado
  • Function : Author
Michael Raupach
  • Function : Author
Henrik Sørensen
  • Function : Author
Shishir Mundra
  • Function : Author
Mezgeen Rasol
  • Function : Author
Rob Polder
  • Function : Author

Abstract

Abstract The steel–concrete interface (SCI) is a complex, multi-phase and multi-scale system. It is widely known to influence the performance and long-term durability of concrete structures. However, a fundamental understanding of its properties and effects on corrosion initiation of embedded reinforcing steel remains elusive. This is attributed to its complicated heterogeneity and time-dependent nature, exacerbated by the lack of suitable techniques for systematic and detailed characterisation. This paper, prepared by members of the RILEM Technical Committee 262-SCI, critically reviews available information regarding current methods (laboratory or field-based) for characterising local properties of the SCI that have been identified as governing factors affecting corrosion initiation. These properties include characteristics of the steel such as mill scale and rust layers, and characteristics of the concrete such as interfacial voids, microstructure and moisture content. We evaluated over twenty methods and summarised their advantages, applications and limitations. The findings show a severe lack of well established, non-destructive techniques that are suitable for direct monitoring of the SCI at a representative scale with sufficiently high resolution (spatial, temporal), particularly for moisture related aspects. Several promising novel techniques with significant potential for further development and application were identified and discussed. Finally, we provide several recommendations for future research needs that are required to advance this critically important topic.

Dates and versions

hal-03676097 , version 1 (23-05-2022)

Identifiers

Cite

Hong Wong, Ueli Angst, Mette Geiker, O. Burkan Isgor, Bernhard Elsener, et al.. Methods for characterising the steel–concrete interface to enhance understanding of reinforcement corrosion: a critical review by RILEM TC 262-SCI. Materials and structures, 2022, 55 (4), pp.124. ⟨10.1617/s11527-022-01961-5⟩. ⟨hal-03676097⟩
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