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Article Dans Une Revue Ocean Engineering Année : 2018

Statistical investigation of different analysis methods for chloride profiles within a real structure in a marine environment

Résumé

11 Corrosion is a major problem for durability of reinforced concrete structures in a marine environment. To 12 establish the best accurate planning for maintenance operations, assessing chloride ingress within concrete is 13 essential. The present paper reports a study conducted to investigate a large amount of field chloride data 14 collected from a 28-years old beam in a splash zone. The chloride profiles are examined based on Fick's second 15 law to estimate the surface content C s and the diffusion coefficient D. Firstly, three different cases considering 16 the location of the maximum chloride content are tested: a reference case (individual analysis), a 15-mm 17 discarded case and a 20-mm discarded case (generic treatments). The results highlight the importance of the 18 individual analysis. C s and D, indeed, appear to be significantly affected by the generic treatment, the relative 19 error being around 50% for C s and 100% for D. A focus is therefore placed on the individual analysis. The 20 coefficients of variation are 44% and 61% for C s and D, respectively. For the statistical distribution, both 21 parameters show a clear dependence. They also follow a lognormal law with a mean value ranging between 22 0.0057 and 0.0085 kg Cl-/ kg concrete for C s and equal to 1.3x10-12 m²/s for D. 23
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Dates et versions

hal-01923540 , version 1 (26-11-2018)

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Inès Othmen, Stéphanie Bonnet, Franck Schoefs. Statistical investigation of different analysis methods for chloride profiles within a real structure in a marine environment. Ocean Engineering, 2018, 157, pp.96 - 107. ⟨10.1016/j.oceaneng.2018.03.040⟩. ⟨hal-01923540⟩
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