CORROSION PERFORMANCE OF DIFFERENT REINFORCEMENT BARS USED IN CONCRETE STRUCTURES

V Sharanya, C Babu, K Saravanan, R Roseline, Upagara Pushpam
International Research Journal of Engineering and Technology   unpublished
The durability of concrete structures and their long-term performance have emerged over the last few decades which becomes a major concern for all. It has been known that steel rebars embedded in concrete are in the passive state, due to the basic nature of concrete. Thus, the steel is not subjected to corrosion and ensures its durability. However, problems may start to occur within few years of service. This could be due to durability but not because of the structural problem. This durability
more » ... roblem is because of carbonation of the concrete or the presence of chloride ions. Because of these factors, the passivity of steel has been destroyed and corrosion commenced. As a result of these effects, the service life of reinforced concrete structures has been reduced and finally the structures have been collapsed. Though a wide variety of protection methods are adopted to extend the service life of concrete structures, corrosion monitoring of the reinforcement bars embedded in concrete is very much important to assess the corrosion condition and to take appropriate remedial measures for preventing the premature failure of the concrete structures. In this paper attempts have been made to study the corrosion behaviour of two different reinforcement bars namely mild steel and stainless steel rebars exposed in simulated concrete environment and the results shows that stainless steel rebars perform better when compared to the mild steel bars.
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