Abstract
The purpose of this study is to give a scientific justification to some empirical results, in steel corrosion field, from concrete containing chlorides. First, it appears that corrosion products on the steels, have different structures and natures in function of the chloride content would be inferior or superior to a characteristic value. Second, the penetration of the chlorides in the concrete can be described by a simple Fick's diffusion law in the most frecuent cases. When cement has a high proportion of tricalcium aluminates and the concrete a small porosity, Fick's law cannot be applied.
Highlights
The diffusion of an ion dissolved in water located in concrete pores is generally described by the Pick's law
Numerous investigations have already published by various authors on the steel corrosion in concrete located in a chloride-containing medium
It is often agreed that in concrete, steels are corroded with a noticeable rate if the chloride content in the concrete at the steels levels is higher than a threshold which depends on the pH (2)
Summary
The purpose of this study is to give a scientific justification to some empirical results, in steel corrosion field, from concrete containing chlorides. It appears that corrosion products on the steels, have different structures and natures in function of the chloride content would be inferior or superior to a characteristic value. The penetration of the chlorides in the concrete can be described by a simple Fick's diffusion law in the most frecuent cases. When cement has a high proportion of tricalcium aluminates and the concrete a small porosity, Fick's law cannot be applied
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