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Characteristics of Acoustic Emissions Generated During Steel Rebar Corrosion in Reinforced Concrete

Anjali, P and Vidya Sagar, R (2021) Characteristics of Acoustic Emissions Generated During Steel Rebar Corrosion in Reinforced Concrete. In: Conference and Exhibition on Non Destructive Evaluation, 5-7 Dec 2019, Bengaluru, pp. 271-281.

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Official URL: https://doi.org/10.1007/978-981-16-0186-6_27


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. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

Item Type: Conference Paper
Publication: Lecture Notes in Mechanical Engineering
Publisher: Springer Science and Business Media Deutschland GmbH
Additional Information: The copyright for this article belongs to Springer Science and Business Media Deutschland GmbH
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 28 Nov 2021 09:24
Last Modified: 28 Nov 2021 09:24
URI: http://eprints.iisc.ac.in/id/eprint/69965

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