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Erschienen in:
2016 | OriginalPaper | Buchkapitel
6. Cross-Sectional Visualization of Defects by SIBIE
verfasst von : Takeshi Watanabe, Ninel Alver, Masayasu Ohtsu
Erschienen in: Innovative AE and NDT Techniques for On-Site Measurement of Concrete and Masonry Structures
Verlag: Springer Netherlands
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Abstract
For nondestructive evaluation (NDE) of concrete structures, the impact-echo method has been successfully applied to locate defects and voids in concrete. To compensate the difficulty in selecting the resonant frequency and to visually locate a defect, an imaging procedure named SIBIE (Stack Imaging of spectral amplitude Based on Impact-Echo) has been developed. This is an imaging technique for visualizing defects of which locations are known or identified. Following the basic concept and procedure, applications to concrete structures are discussed. The presence of the ungrouted duct can be visually identified by the SIBIE procedure in both the cases of plastic sheath and metal sheath. In addition, the depth of the surface crack is visually evaluated.