Detection of Internal Flaws in Structural Concrete Elements by Impact-Echo Technique
IR@SERC: CSIR-Structural Engineering Research Centre, Chennai
View Archive Info| Field | Value | |
| Title |
Detection of Internal Flaws in Structural Concrete Elements by Impact-Echo Technique
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| Creator |
Bhaskar, S.
Wiggenhauser, H. Srinivasan, P. Murthy, S.G.N. Ravisankar, K. Nagesh R. Iyer Lakshmanan, N. |
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| Subject |
Impact-echo
Scanning Waveform Frequency spectra Flaws |
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| Description |
This paper explains the application of Impact-Echo (IE) for the detection of flaws in structural concrete elements.
The main objective of the paper is to detect the internal flaws such as cracks, voids, honeycombs etc. that cannot
be observed by visual inspection. Studies have been carried out using a modified ‘DOCtor’ impact-echo system on a
specially constructed NDT test specimen. The test specimen is designed and constructed at Structural Engineering
Research Centre (SERC), Chennai, exclusively for the data generation and validation of different NDT techniques.
Impact data is generated in a manual scanning mode. An average of two impacts has been taken at each point along
the grid line. Impacts have been repeated in order to ensure repeatable or reproducible time domain waveforms. The
waveforms have been recorded and the resulting frequency spectra have been generated by using Fourier Transfor-
mation Technique (FFT). Line (B-scan) and area (C-scan) scan images are made use of in analysing the impact data.
It is observed from the analysis, that the impact-echo technique provides useful and reliable information in detecting
the thickness and internal flaws such as cracks, voids etc
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| Date |
2009
2009 2009 |
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| Type |
Article
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| Identifier |
Journal of Structural Engineering, Vol.36, No.1, April-May 2009, p.7-10
http://hdl.handle.net/123456789/406 |
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| Language |
en
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| Rights |
It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
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| Publisher |
Structural Engineering Research Center, Chennai
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