Abstract
This experimental study reports on the characteristics of acoustic emissions (AE) generated during steel reinforcement corrosion in reinforced concrete (RC) cylindrical specimens. One of the main causes for deterioration of RC structures is corrosion of steel rebar in concrete. It is known that corrosion is of two types, one is chloride induced and another is carbonation. In this study, chloride induced corrosion in RC structures is studied. A number of cylindrical specimens with steel reinforcement were monitored with 3% NaCl and 5% NaCl solution with constant 5 Voltage in the laboratory. The variations of AE parameters namely signal strength, RA, and average frequency (AF) during the progression of corrosion were studied. It is known that AE signal strength is the area under the rectified signal envelop. It was observed that cumulative signal strength (CSS) is linearly varied during the corrosion of steel reinforcement. With the initiation of micro-cracking of concrete, there was a very distinct change in the trend of the curve between CSS and monitoring time. AE testing is an effective corrosion monitoring non-destructive testing method for RC structures in-situ.
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Anjali, P., Vidya Sagar, R. (2021). Characteristics of Acoustic Emissions Generated During Steel Rebar Corrosion in Reinforced Concrete. In: Mukhopadhyay, C.K., Mulaveesala, R. (eds) Advances in Non-destructive Evaluation . Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-0186-6_27
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DOI: https://doi.org/10.1007/978-981-16-0186-6_27
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