Steel corrosion mechanisms
Corrosion of reinforced concrete structures

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C6151 V1 Article

Steel corrosion mechanisms
Corrosion of reinforced concrete structures

Author : Bruno CAPRA

Publication date: November 10, 2014 | Lire en français

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3. Steel corrosion mechanisms

3.1 Basic environment for steel in sound concrete

During the mixing of Portland cement-based concrete, the main anhydrides contained in the clinker (silicates C2S and C3S, aluminates C3A and C4AF) hydrate on contact with water [C 920]. From the very first moments, a very basic pH of around 13.5 to 14 can be measured in the interstitial liquid.

Schematically, the hydration of C2S and C3S leads to the formation of...

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