Research Articles | Challenge Journal of Concrete Research Letters

Empirical Model for Evaluation of Concrete Corrosion Current Density

Saha Dauji
Saha Dauji * Bhabha Atomic Research Centre, Mumbai, India
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Abstract

In health evaluation of existing concrete structures, the state of reinforcement corrosion needs to be ascertained without causing distress to the structure, and one indirect approach is to correlate the resistivity of concrete to the corrosion current density and thus to the corrosion. Three models reported in literature are analyzed in this paper for their accuracy, and a new approach with different models for different ranges of resistivity are proposed which performs with better accuracy. The strengths and the limitations of the different models are discussed.

Keywords

corrosion current; concrete resistivity; reinforcement corrosion

References

Ahmad, S., An experimental study on correlation between concrete resistivity and reinforcement corrosion rate, Anti-Corrosion Methods and Materials: (2014) 61 (3), pp.158 – 165.

Bertolini, L.; Elsener, B.; Pedeferri, P.; and Polder, R., Corrosion of steel in concrete, Wiley-VCH Verlag GmbH & Co. (2004).

Gulikers, J., Theoretical considerations on the supposed linear relationship between concrete resistivity and corrosion rate of steel reinforcement, Materials and Corrosion: (2005) 56 (6), pp. 393-403.

Hornbostel, K.; Larsen, C. K.; and Geiker, M. R., Relationship between concrete resistivity and corrosion rate – A literature review, Cement & Concrete Composites: (2013) 39, pp. 60 – 72.

Dauji, S.; Bhargava, K.; Agarwal, K.; Roy, A.; and Basu, S., Estimation of Corrosion Current Density from Resistivity of Concrete, Paper No. RCC 03, Proceedings of CORCON 2015, Chennai, November 19-21, 2015.

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