Influence of Freeze-Thaw Damage on the Steel Corrosion and Bond-Slip Behavior in the Reinforced Concrete

الملخص EN

This paper mainly studies the behavior of steel corrosion in various reinforced concrete under freeze-thaw environment.

The influence of thickness of concrete cover is also discussed.

Additionally, the bond-slip behavior of the reinforced concrete after suffering the freeze-thaw damage and steel corrosion has also be presented.

The results show that the freeze-thaw damage aggravates the steel corrosion in concrete, and the results become more obvious in the concrete after suffering serious freeze-thaw damage.

Compared with the ordinary concrete, both air entrained concrete and waterproofing concrete possess better resistance to steel corrosion under the same freeze-thaw environment.

Moreover, increasing the thicknesses of concrete cover is also an effective method of improving the resistance to steel corrosion.

The bond-slip behavior of reinforced concrete with corroded steel decreases with the increase of freeze-thaw damage, especially for the concrete that suffered high freeze-thaw cycles.

Moreover, there exists a good correlation between the parameters of bond-slip and freeze-thaw cycles.

The steel corrosion and bond-slip behavior of reinforced concrete should be considered serious under freeze-thaw cycles environment, which significantly impact the durability and safety of concrete structure.