Frequency dependent electric properties of homogeneous multi-phase lossy media in the ground-penetrating radar frequency range

Patriarca, Claudio, Tosti, Fabio, Velds, Casper, Benedetto, Andrea, Lambot, Sébastien and Slob, Evert (2013) Frequency dependent electric properties of homogeneous multi-phase lossy media in the ground-penetrating radar frequency range. Journal of Applied Geophysics, 97. pp. 81-88.

[img] PDF
Patriarca et al_JAG_2013.pdf - Accepted Version
Restricted to Repository staff only

Download (2MB) | Request a copy

Abstract

The electric properties of multiphase aggregate mixtures are evaluated for a given mineralogic composition at frequencies between 300 kHz and 3 GHz. Two measurement techniques are employed: a coaxial transmission line and a monostatic stepped-frequency ground-penetrating radar (GPR). The effect of increasingwater content is analyzed in several sand clay mixtures. For the end-member case of maximum clay (25% in weight) and increasing water content, investigations are compared between the twomeasurement techniques. The electrical properties of materials are influenced by the amount ofwater, but clay affects the frequency dependency of soils showing distinctive features regardless of themineralogy. The microwave attenuation, expressed by the quality factor Q, is partly dependent on frequency and on the water content. The performance of one empirical and one volumetric mixing model is evaluated to assess the capability of indirectly retrieving the volumetric water content for a known mixture. The results are encouraging for applications in the field of pavement engineering with the aim of clay detection. The models used show similar behaviors, but measured data are better modelled using third order polynomial equations.

Item Type: Article
Uncontrolled Keywords: Road bearing courses electric properties; Clay detection; Non-destructive testing; Mixing-models road; Pavement inspection
Subjects: Construction and engineering > Built environment
Construction and engineering > Civil and structural engineering
Computing
Construction and engineering
Depositing User: Fabio Tosti
Date Deposited: 24 May 2016 16:26
Last Modified: 16 Oct 2017 11:45
URI: http://repository.uwl.ac.uk/id/eprint/2110

Actions (login required)

View Item View Item

Menu