In order to examine the effectiveness of non-destructive inspection of concrete using supersonic waves, we carried out several experiments. The transmission method was used for the specimen for static loading, and the reflection method was used for specimen for dynamic testing. For the static loading, the propagating speeds of supersonic waves decrease with increase of maximum hysteretic strain level. However, for the dynamic testing, there were no clear correlation between the velocities of supersonic wave and the maximum hysteretic strain level. This may be due to the fact that surface wave amplitude is considerably larger than that of reflection waves.
