構造物調査・診断 (3)

[V-227] Non-destructive Evaluation for corroded rebar in concrete using ultrasonic testing

*平田 颯¹、鈴木 啓悟¹ (1. 福井大学)

Keywords:Nondestructive inspection, Corroded rebar, Ultrasonic test, Linearized inverse scattering methods, Parasitic discrete wavelet transform

We investigate signal processing methods using waveform processing for constructing an ultrasonic test method to judge rebar in concrete is corroded or not. We perform ultrasonic testing to process imaging by applying linearized inverse scattering analysis with a parasitic filter. As a result, ultrasonic test makes it possible to judge the rebar is corroded or not, and the effectiveness of the parasitic filter application is confirmed. Signal intensity of healthy rebar tends to be stronger than that of corroded rebar, and it is possible to make a difference of about 30% when applying the parasitic filter.