Residual Flexural Capacity of RC Members due to Corrosion

Abstract

Reinforced concrete slabs and Beams are normally designed as under reinforced to supply ductile behaviour such as the tensile moment of resistance. In coastal environment, reinforcement corrosion is an obvious motive of deterioration of concrete structures, which affects the durability and service existence of reinforced concrete structure. Flexural strength is a measure of the tensile strength of concrete, in different phrases it is a measure of a resistance closer to failure in bending. Corrosion of reinforcing metallic bars in concrete members is an electrochemical response between the steel and its surrounding environment that minimizes the bond between metal and concrete. The predominant intention of this study is to analyse the strength reduction of corroded specimens. Accelerated corrosion technique is used to corrode the Reinforced concrete specimens. Reinforced concrete specimens have been casted through using M20 grade concrete formed with OPC (ordinary Portland cement).The effect of corrosion of reinforcement on the flexural strength of a uniformly loaded simply supported one-way slab and Beam was investigated at different corrosion levels like (0% means non corroded specimens 2.5%, 5%, 7.5% and 10%). The moss loss reduction of corroded bars at different corrosion levels was studied and observed to be 97.5% accurate. The experimental load carrying capacity of one way slabs were compared with theoretical results and are found to be 95% accuracy validating the test procedure adopted.