Bond Behaviour between Recycled Aggregate Concrete and Corroded Steel Rebars

Abstract:

In this paper, corrosion percentages ranged from 0 to 7.62% of steel rebar for pulling out specimens was controlled by the accelerated method of electrochemistry. According to the RILEM standard, pulling out test with dimensions of 200×200×200mm3 and recycled aggregate concrete (RAC) of C30 was carried out, and the load versus slip curves between RAC and corroded steel rebars with different corrosion percentages were recorded. Based on the experimental results, the effect of RAC and reinforcement corrosion on the bond behaviour between steel rebars was investigated. The results show that the bond strength between RAC and deformed bars increases with corrosion up to a certain amount, and then the bond strength decreases as the corrosion rate further increases, which is similar to that of normal concrete. However, the decreasing rate of the bond strength between RAC and corroded steel rebars is much faster than that between normal concrete and corroded steel bars. According to the testing results, the relationship of bond stress-slip between corroded bars and RAC was given in the end.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 1391-1394
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.1391
• Online since: May 2012
• Authors: Bin Lei
• Keywords: Bond Behaviour, Corrosion, Degradation, Recycled Aggregate Concrete (RAC), Steel Rebars

References

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DOI: 10.1016/j.conbuildmat.2005.08.008