NDLI: Impact of pore water conductivity and porosity on the electrical conductivity of kaolinite

Content Provider	Springer Nature Link
Author	Choo, Hyunwook Song, Jaewon Lee, Woojin Lee, Changho
Copyright Year	2016
Abstract	The purpose of this study is to quantify the magnitudes of surface conduction and pore water conduction from the measured electrical conductivity of kaolinite, with the ultimate goal of estimating the electrical conductivity of kaolinite with a wide range of pore water conductivities (σ $_{w}$ = 0.013–3.356 S/m) and porosities (n = 0.368–1.0). Therefore, the theoretical background of the electrical conductivity in soils was reviewed, and electrical conductivity measurements on kaolinite were performed using both slurry and consolidation tests in this study. The results of this study demonstrate that the variations of measured electrical conductivity (σ $_{mix}$) with n are debatable according to the values of σ $_{w}$, because a decrease in n results in both an increase in surface conduction (K $_{s}$) and a decrease in pore water conduction (K $_{w}$); this causes the relative magnitude of K $_{s}$ compared to that of K $_{w}$ to vary with σ $_{w}$ and n. Consequently, this study develops the relation between the porosity-normalized K $_{s}$/K $_{w}$ and 1/σ $_{w}$. Additionally, the surface conductivity of the tested kaolinite is back-calculated and compared with the previous relationship between K $_{s}$ and zeta potential of kaolinite. The measured and estimated σ $_{mix}$ values are compared with the varying pore water conductivity and porosity values.
Starting Page	1419
Ending Page	1429
Page Count	11
File Format	PDF
ISSN	18611125
Journal	Acta Geotechnica
Volume Number	11
Issue Number	6
e-ISSN	18611133
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-09-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electrical conductivity Kaolinite Pore water conduction Pore water conductivity Porosity Surface conduction Geoengineering, Foundations, Hydraulics Continuum Mechanics and Mechanics of Materials Geotechnical Engineering & Applied Earth Sciences Soil Science & Conservation Soft and Granular Matter, Complex Fluids and Microfluidics Structural Mechanics
Content Type	Text
Resource Type	Article
Subject	Geotechnical Engineering and Engineering Geology

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