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Broadband electromagnetic analysis of compacted kaolin
- Source :
- Measurement Science and Technology, Measurement Science and Technology, 2017, 28 (1), ⟨10.1088/1361-6501/28/1/014016⟩, Measurement Science and Technology, IOP Publishing, 2017, 28 (1), ⟨10.1088/1361-6501/28/1/014016⟩
- Publication Year :
- 2016
- Publisher :
- IOP Publishing, 2016.
-
Abstract
- The mechanical compaction of soil influences not only the mechanical strength and compressibility but also the hydraulic behavior in terms of hydraulic conductivity and soil suction. At the same time, electric and dielectric parameters are increasingly used to characterize soil and to relate them with mechanic and hydraulic parameters. In the presented study electromagnetic soil properties and suction were measured under defined conditions of standardized compaction tests. The impact of external mechanical stress conditions of nearly pure kaolinite was analyzed on soil suction and broadband electromagnetic soil properties. An experimental procedure was developed and validated to simultaneously determine mechanical, hydraulic and broadband (1 MHz-3 GHz) electromagnetic properties of the porous material. The frequency dependent electromagnetic properties were modeled with a classical mixture equation (advanced Lichtenecker and Rother model, ALRM) and a hydraulic-mechanical-electromagnetic coupling approach was introduced considering water saturation, soil structure (bulk density, porosity), soil suction (pore size distribution, water sorption) as well as electrical conductivity of the aqueous pore solution. Moreover, the relaxation behavior was analyzed with a generalized fractional relaxation model concerning a high-frequency water process and two interface processes extended with an apparent direct current conductivity contribution. The different modeling approaches provide a satisfactory agreement with experimental data for the real part. These results show the potential of broadband electromagnetic approaches for quantitative estimation of the hydraulic state of the soil during densification.
- Subjects :
- Materials science
Suction
Applied Mathematics
0211 other engineering and technologies
Compaction
02 engineering and technology
Mechanics
Conductivity
Physics::Classical Physics
01 natural sciences
6. Clean water
Physics::Geophysics
010309 optics
Soil structure
Hydraulic conductivity
Electrical resistivity and conductivity
0103 physical sciences
Compressibility
Porosity
[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Instrumentation
Engineering (miscellaneous)
ComputingMilieux_MISCELLANEOUS
021101 geological & geomatics engineering
Subjects
Details
- ISSN :
- 13616501 and 09570233
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Measurement Science and Technology
- Accession number :
- edsair.doi.dedup.....8e3e0168c0ae3b455fb048e2294f79fd