FraMCoS 7 2010 Jeju, South Korea

Degradation of reinforced concrete structures under atmospheric corrosion

For the study of long term atmospheric corrosion of rebars embedded in concrete, a reactive transport model has been developed, considering the kinetic of oxygen diffusion through the system and its consumption at the metal/dense product layer interface as a…

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Year 2010
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Abstract

For the study of long term atmospheric corrosion of rebars embedded in concrete, a reactive transport model has been developed, considering the kinetic of oxygen diffusion through the system and its consumption at the metal/dense product layer interface as a function of concrete water saturation degree. Cor- rosion products growth can then be simulated and used as input to a mechanical model capable of predicting the damage induced by corrosion. This multi-physics model has been implemented and first applied to a sim- ple bi-dimensional reinforced concrete slab. Then the model has been applied to a three-dimensional beam, inspired from chloride corrosion experiments performed at LMDC (INSA Toulouse). Special attention has been given to the outer environmental conditions, in order to investigate their role in the corrosion degrada- tion phase.