—Broadband dielectric measurement methods based
on vector network analyzer coupled with coaxial transmission
line cell (CC) and open-ended coaxial probe (OC) are simply
reviewed, by which the dielectric behaviors in the frequency
range of 1 MHz to 3 GHz of two practical geomaterials are
investigated. Kaolin after modified compaction with different
water contents is measured by using CC. The results are
consistent with previous study on standardized compacted
kaolin and suggest that the dielectric properties at frequencies
below 100 MHz are not only a function of water content but also
functions of other soil state parameters including dry density.
The hydration process of a commercial grout is monitored in
real time by using OC. It is found that the time dependent
dielectric properties can accurately reveal the different stages
of the hydration process. These measurement results
demonstrate the practicability of the introduced methods in
determining dielectric properties of soft geomaterials.
—Dielectric spectroscopy, open-ended coaxial
probe, coaxial transmission line, real-time monitoring,
physicochemical properties of geomaterials.
Z. Chen, M. Schwing, J. Karlovšek, and A. Scheuermann are with
Geotechnical Engineering Centre, School of Civil Engineering, the
University of Queensland, Brisbane, QLD 4072, Australia (e-mail:
email@example.com, firstname.lastname@example.org, email@example.com,
N. Wagner is with Institute of Material Research and Testing (MFPA),
Bauhaus University, Weimar, Germany (e-mail: firstname.lastname@example.org).
Cite: Z. Chen, M. Schwing, J. Karlovšek, N. Wagner, and A. Scheuermann, "Broadband Dielectric Measurement Methods for Soft
Geomaterials: Coaxial Transmission Line Cell and
Open-Ended Coaxial Probe," International Journal of Engineering and Technology vol. 6, no. 5, pp. 373-380, 2014.