Electromagnetic characterization of grouting materials of bridge post tensioned ducts for NDT using capacitive probe

Bore, T., Placko, D., Taillade, F. and Sabouroux, P. (2013) Electromagnetic characterization of grouting materials of bridge post tensioned ducts for NDT using capacitive probe. NDT and E International, 60 110-120. doi:10.1016/j.ndteint.2013.07.010


Author Bore, T.
Placko, D.
Taillade, F.
Sabouroux, P.
Title Electromagnetic characterization of grouting materials of bridge post tensioned ducts for NDT using capacitive probe
Journal name NDT and E International   Check publisher's open access policy
ISSN 0963-8695
1879-1174
Publication date 2013-12
Sub-type Article (original research)
DOI 10.1016/j.ndteint.2013.07.010
Open Access Status Not yet assessed
Volume 60
Start page 110
End page 120
Total pages 11
Place of publication Camden, London, United Kingdom
Publisher Elsevier
Language eng
Abstract The use of a capacitive probe as a non-destructive investigative technique for controlling the post tensioned ducts of bridges has gained increasing acceptance in France since several years. A field campaign measurement made in 2006 has shown the performance of the capacitive probe developed by the IFSTTAR. Nevertheless, some results are not understood, and in particular the behaviour of the probe when cement exudation product are present in the duct. Without an accurate knowledge of the electromagnetic properties of those products it is impossible to quantitatively assess the results of our capacitive probe. This paper reports the development of a coaxial transmission line feature. It was designed to allow the evaluation of a large type of material (liquid, paste or granular) over a large frequency range (50 MHz-4 GHz at maximum). A calibration scheme developed before at the Fresnel Institute was used. Using a two port S parameter instrument, the complex permittivity and magnetic permeability were evaluated by frequency domain measurement. The electromagnetic characterization of cement paste, cement exudation products and injection wax has brought us some key results in the interpretation of the capacitive probe signal. The results of this characterization were then used in a 3D semi analytical modelling of the problem. The studies of configurations with exudation products are presented and compared to experimental results obtained with our capacitive probe on laboratory duct.
Keyword Bridges posttensionedducts
Capacitiveprobe
Cement exudationproducts
Civil engineeringstructures
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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