Effect of crack openings on carbonation-induced corrosion - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Access content directly
Journal Articles Cement and Concrete Research Year : 2017

Effect of crack openings on carbonation-induced corrosion

Rita Maria Ghantous
  • Function : Author
Stéphane Poyet
Valerie L'Hostis
  • Function : Author
Nhu-Cuong Tran
  • Function : Author

Abstract

Reinforced concrete is widely used in the construction of buildings, historical monuments, infrastructures and nuclear power plants. For a variety of reasons, many concrete structures are subject to unavoidable cracks that accelerate the diffusion of atmospheric carbon dioxide to the steel/concrete interface. Carbonation at the interface induces steel corrosion that could cause the development of new cracks in the structure, a determining factor for its durability. The aim of this article is to study the effect of existing cracks on the development of carbonation induced corrosion. The results indicate that, after the initiation phase, the corrosion kinetics decreases with time and the free corrosion potential increases independently of the crack opening. In addition, the corroded zone matches the carbonated one. The interpretation of these results allows the authors to conclude that, during the corrosion process, corrosion products seal the crack and act as a barrier to oxygen and water diffusion. Consequently, the influence of crack opening on corrosion development is masked and the corrosion development is limited. (C) 2017 Elsevier Ltd. All rights reserved.
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Dates and versions

hal-01847524 , version 1 (23-07-2018)

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Rita Maria Ghantous, Stéphane Poyet, Valerie L'Hostis, Nhu-Cuong Tran, Raoul François. Effect of crack openings on carbonation-induced corrosion. Cement and Concrete Research, 2017, 95, pp.257--269. ⟨10.1016/j.cemconres.2017.02.014⟩. ⟨hal-01847524⟩
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