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3. Steel-concrete adhesion
The transmission of forces from concrete to reinforcement, or vice versa, is made possible by the phenomenon known as "bonding" between these materials. Adhesion is actually the result of friction between steel and concrete.
3.1 Explanation of the phenomenon
Bond strength is the means of transferring forces between concrete and steel. It depends on :
on the one hand, the mechanical action caused by the tightening of the concrete encasing the steel;
secondly, the bonding of the steel by the cement in the concrete or by the lime released during the setting of the cements and the iron oxide covering the reinforcement: a protective salt oxide is formed, a ferrite passivating film.
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Steel-concrete adhesion
Resistances of reinforced concrete
Bibliography
Standards and norms
- Eurocode 2 – Design of concrete structures – Part 1-1: General rules and rules for buildings - NF EN 1992-1-1 - Octobre 2005
- Eurocode 2 – Design of concrete structures – Part 3: silos and tanks - NF EN 1992-3 - Décembre 2006
- Execution of concrete structures – National supplement to NF EN 13670:2013 - NF EN 13670/CN - Février 2013
- Calculation rules – Method for predicting the fire behavior of concrete...
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