Dielectric measurement method for real-time monitoring of initial hardening of backfill materials used for underground construction

Karlovsek, Jurij, Schwing, Moritz, Chen, Zhen, Wagner, Norman, Williams, David J. and Scheuermann, Alexander (2016) Dielectric measurement method for real-time monitoring of initial hardening of backfill materials used for underground construction. Journal of Geophysics and Engineering, 13 2: S19-S27. doi:10.1088/1742-2132/13/2/S19


Author Karlovsek, Jurij
Schwing, Moritz
Chen, Zhen
Wagner, Norman
Williams, David J.
Scheuermann, Alexander
Title Dielectric measurement method for real-time monitoring of initial hardening of backfill materials used for underground construction
Journal name Journal of Geophysics and Engineering   Check publisher's open access policy
ISSN 1742-2140
1742-2132
Publication date 2016-03-30
Sub-type Article (original research)
DOI 10.1088/1742-2132/13/2/S19
Open Access Status Not Open Access
Volume 13
Issue 2
Start page S19
End page S27
Total pages 9
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Collection year 2017
Language eng
Abstract The broadband dielectric measurement method based on the vector network analysis technique, in combination with an open-ended coaxial probe, was applied to the determination of the dielectric relaxation behaviour of one- and two-component backfilling grout materials in the frequency range from 40 MHz to 2 GHz. The cement hydration process and the gelling of commercial grouts was monitored in real-time to investigate the application of non-destructive testing methods in the tunnelling industry. It was found that the time-dependent dielectric relaxation behaviour can accurately reveal the different stages of the hydration process and delineate the start of gel hardening. These measurement results demonstrate the practicability of the real-time dielectric measurement method to determine the broadband dielectric parameters of conventional backfill materials used in underground construction to determine construction integrity using non-destructive testing methods.
Keyword Dielectric relaxation spectroscopy
Ground penetrating radar velocity and attenuation
Non-destructive testing
One- and two-component grout
Open-ended coaxial probe
Real-time monitoring
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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