電磁パルス音響法を用いた鉄筋コンクリートにおける鉄筋腐食の評価
Evaluation of Rebar Corrosion in Reinforced Concrete using Electromagnetic Pulse-induced Acoustic Testing Method
著者:
周 新武 武田 翔 内一 哲哉 橋本 光男 髙木 敏行 （東北大）
発刊日:
公開日:
Concrete structureCorrosion evaluationElastic waveElectromagnetic Pulse-induced Acoustic TestingNondestructive testing
概要
This paper proposed the evaluation of rebar corrosion in reinforced concrete by an electromagnetic pulse-induced acoustic testing method. A strong pulsed electromagnetic force is applied to the specimen, and the rebars will generate the elastic waves. The difference in the bonding force between the rebars and concrete depending on rust is evaluated based on the intensity and waveform variation of elastic waves. In this study, the rusted and un- rusted rebar specimens are prepared, and the AE sensor is placed in different positions. The results show that whether rebars have rust or not does not affect the occurrence of elastic waves. In addition, the maximum signal amplitudes of the rusted and un-rusted rebar specimens were different. The vibration of the rebars appears to be affected by the presence of rust.
