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Mechanisms of corrosion-induced cracks in concrete identified by AE analysis
Concrete structures suffer from the corrosion of reinforcing steel-bars due to severe environments, in particular, chloride attack. Acoustic emission (AE) techniques have been extensively applied to concrete and concrete structures. In order to identify the onset of corrosion and the nudeation of concrete cracking due to expansion of corrosion products, continuous AE monitoring is available. These corrosion-induced cracks in concrete are studied in an accelerated corrosion test, where kinematics of micro-cracks are identified by SiGMA (Simplified Greens functions for Moment tensor Analysis) analysis. Monitoring the corrosion process of rebar by AE, it is confirmed that the onset of corrosion and the nudeation of corrosion-induced cracks in concrete are successfully identified. Then, generating mechanisms of corrosion-induced cracks are clarified by the SiGMA analysis.
Mechanisms of corrosion-induced cracks in concrete identified by AE analysis
Concrete structures suffer from the corrosion of reinforcing steel-bars due to severe environments, in particular, chloride attack. Acoustic emission (AE) techniques have been extensively applied to concrete and concrete structures. In order to identify the onset of corrosion and the nudeation of concrete cracking due to expansion of corrosion products, continuous AE monitoring is available. These corrosion-induced cracks in concrete are studied in an accelerated corrosion test, where kinematics of micro-cracks are identified by SiGMA (Simplified Greens functions for Moment tensor Analysis) analysis. Monitoring the corrosion process of rebar by AE, it is confirmed that the onset of corrosion and the nudeation of corrosion-induced cracks in concrete are successfully identified. Then, generating mechanisms of corrosion-induced cracks are clarified by the SiGMA analysis.
Mechanisms of corrosion-induced cracks in concrete identified by AE analysis
Mechanismus der Identifizierung korrosionsinduzierter Risse in Beton mittels Schallemissionsanalyse
Ohtsu, Masayasu (author) / Mori, Kanako (author) / Ohno, Kentaro (author)
2009
6 Seiten, 11 Bilder, 9 Quellen
Conference paper
English
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