A COMPREHENSIVE REVIEW ON EFFECT OF CRACK PROPAGATION OF CORRODED STEEL IN CONCRETE
Steel corrosion in reinforced concrete structures can lead to cracking of concrete cover when corrosion products expand. Corrosion of steel reinforcement is a serious problem for durability and serviceability of reinforced concrete. It is generally recognized that cracks provide easy access to ingress of chlorides in concrete and hence, the initiation of corrosion of steel in cracked concrete occurs at early stage. As the reinforcing steel corrodes, it expands and exerts pressure on the surrounding concrete cover, causing tensile stresses in concrete. This ultimately leads to cracking and spalling of the concrete cover, further exacerbating the durability problems of a structure and increasing the rate of its deterioration. The durability of structure cannot be guaranteed when a corrosion expansion crack reaches the surface of the reinforced concrete member. This paper critically reviews predictive models for crack initiation and propagation in concrete due to corrosion of the reinforcing bars and also focuses on the possible gaps and scope of advanced work to do for identifying the effective solution to reduce this problem. This paper also imparts a review study on the causes and factors responsible for corrosion. 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.