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This study investigated experimental bearing capacity of corroded reinforced concrete beams. Six testing beams were made of concrete having compressive strength of 25 MPa, with the dimensions of 80 × 120 × 1200 mm. They were divided into two groups depending of tension reinforcement ratio. Of which, two beams were used as the controls, whereas the other fours ones having tension reinforcement were subjected to corrosion by the electrochemical accelerated corrosion method. After accelerated corrosion, the beams were tested under monotonic loading to investigate their performance. All the tested beams were failed in flexural failure mode corresponding to spalling of cover concrete. Test results showed that as corrosion rate in tension reinforcement increased, the lower cracking load and the displacement at the cracking load were observed. As the corrosion rate of tension reinforcement ranging from 7.5% to 8.3%, it had little effect on the peak load. As the corrosion rate increased further, approximately 10.8% and 14.1% in this study, the peak load decreased significantly. The higher the corrosion rate, the lower the displacement of corroded beams. Moreover, as corrosion rate of tension reinforcement increased the number of concrete cracks and their spacing reduced, and the width of cracks was generally larger.

An experimental study on flexural behavior of corroded reinforced concrete beams using electrochemical accelerated corrosion method