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Review study towards corrosion mechanism and its impact on the durability of concrete structures

Department of Civil Engineering, Sam Higginbottom University of Agriculture Technology and Sciences (Formerly AAI-DU), Allahabad - 211007, U.P, India

This paper imparts a review study on the causes and factors responsible for corrosion, its initiation and propagation mechanism inside the structures, leading to a better discernment of the problem associated with the durability of the existing structures. This study employs all necessary information related to the corrosion activity, fostering the researchers towards explicating some productive outcome to enhance the durability characteristics as well as the service life of reinforced concrete structures. Different techniques like, Impressed current technique (normally in a range of 1 mA/cm2 to 4 mA/cm2) has been adopted by several authors to induce corrosion artificially to better correlate the result with the natural form of corrosion in the structures. This paper particularly emphasizes on residual flexure and shear capacity of reinforced concrete sections undergoing corrosion mechanism, the effect of which leads to a reduction in strength of up to 50%–60%. Several empirical relationships for the prediction of residual load capacity (flexure and shear) of a reinforced-concrete members and relationships for the surface crack width (lying in a range of 0.05 mm to 15 mm) and weight/mass loss (average loss of 15%–30%) were established based on the data obtained by various experimental observations.
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© 2018 the Author(s), licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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