Analysis of corroded concrete beam using secondary-AE

The main causes of structural failure have been steel reinforcement corrosion of reinforced concrete (RC) structures. Early steel corrosion detection could restrict the cost of the rehabilitation work and minimize the extent and location of required repair or replacement. Of the test of deteriorated concrete beams due to steel corrosion being tested under loading using the non-destructive testing (NDT), i.e., acoustic emission method (AE) is the more efficient method of RC structure evaluation and early corrosion detection. The tests were conducted on corroded beam specimens subjected to cyclic stress before the onset of the initial cracks for a secondary source of AE at the highest load level (i.e., 4 kN). Ib-value and cumulative signal strength (CSS) of AE are recommended to analyze the effects of severe corrosion damage before the initial cracking becomes apparent; as corrosion levels increase, the CSS ratio also increases. It shows that damage caused by a loss in the cross-section of the beams has occurred.