Investigation of Geotechnical Parameters Affecting Electrical Resistivity of Compacted Clays
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 12
Abstract
The use of resistivity imaging (RI) in subsurface investigation has increased in recent years. RI is a non-destructive method and provides a continuous image of the subsurface. However, only qualitative evaluation of the subsurface can be obtained from RI. The correlations between RI results and geotechnical engineering properties of soils have become important for site investigation using this method. The primary objective of the current study was to determine the geotechnical parameters affecting electrical resistivity of compacted clays. Understanding the influential factors will be helpful in determining the correlations between RI results and geotechnical properties of soil. The effects of moisture content, unit weight, degree of saturation, specific surface area, percentages of pores, and ion composition on soil resistivity were investigated. Soil samples used were classified as highly plastic clay (CH) according to the Unified Soil Classification System. High-energy X-ray fluorescence tests indicated the presence of high percentages of aluminum, silicon, and calcium ions in the samples. In addition, scanning electron microscope images were analyzed to identify clay structure and the distribution of pores. It was determined that the dominant clay mineral in the soil samples was montmorillonite. Soil resistivity tests were conducted in the laboratory at varying moisture contents and unit weights. Based on the experimental results, the average reduction in soil resistivity was 13.8 Ohm-m for an increase of moisture content from 10 to 20%. Test results indicated that soil resistivity decreased with an increase in moist unit weight. In addition, soil resistivity increased from 4.3 to 14.2 Ohm-m for an increase of surface area from 69.6 to 107.1 m2/g at 18% moisture content and 11.8 kN/m3 dry unit weight. Soil with high surface area required more water for the formation of water film and bridging between the particles. This might cause an increase in soil resistivity with an increase of surface area. Moreover, specific surface area also controlled resistivity when soil resistivity was plotted against calcium ions and pore spaces of the soil samples. Therefore, in addition to moisture content and unit weight, specific surface area of soils was identified as an important factor influencing soil resistivity.
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References
AASHTO. (2005). “Standard specifications for transportation materials and methods of sampling and testing.” AASHTO T288-91, Washington, DC.
Abu-Hassanein, Z. S., Benson, C. H. and Blotz, L. R. (1996). “Electrical resistivity of compacted clays.” J. Geotech. Eng., 122(5), 397–406.
Adobe Photoshop [Computer software]. San Jose, CA, Adobe System.
Archie, G. E. (1942). “The electrical resistivity log as an aid in determining some reservoir characteristics.” Petroleum Technology, T.P. 1422, Shell Oil Co., Houston.
ASTM. (2010a). “Annual book of standards, volume 04.08, soil and rock.” D422, West Conshohocken, PA.
ASTM. (2010b). “Annual book of standards, volume 04.08, soil and rock.” D698, West Conshohocken, PA.
ASTM. (2010c). “Annual book of standards, volume 04.08, soil and rock.” 4318, West Conshohocken, PA.
ASTM. (2010d). “Annual book of standards, volume 04.08, soil and rock.” G57-06, West Conshohocken, PA.
AutoCAD. (2011). AutoCAD services and support, Auto Desk, San Rafael, CA.
Barthelmy, D. (1997). “Minerology database.” 〈http://webmineral.com〉 (May 25, 2011).
Bryson, L. S. (2005). “Evaluation of geotechnical parameters using electrical resistivity measurements.” Proc., Earthquake Eng. Soil Dyn., Geotechnical Special Publication 133, Geo-Frontiers 2005, ASCE, Reston, VA., 1–12.
Das, B. M. (2004). Principles of foundation engineering, Thomson Learning, Outram, Singapore.
Ekwue, E., and Bartholomew, J. (2011). “Electrical conductivity of some soils in Trinidad as affected by density, water and peat content.” Biosystems Eng., 108(2), 95–103.
Fukue, M., Minato, T., Horibe, H., and Taya, N. (1999). “The micro-structures of clay given by resistivity measurements.” Eng. Geol., 54(1–2), 43–53.
Giao, P., Chung, S., Kim, D., and Tanaka, H. (2003). “Electric imaging and laboratory resistivity testing for geotechnical investigation of Pusan clay deposits.” J. Appl. Geophys., 52(4), 157–175.
Holtz, R. D., and Kovacs, W. D. (1981). An introduction to geotechnical engineering, Prentice Hall, Englewood Cliffs, NJ.
Kaiser, B., and Wright, A. (2008). Draft BRUKER XRF spectroscopy user guide: Spectral interpretation sources of interference, BRUKER, Madison, WI.
Kalinski, R., and Kelly, W. (1993). “Estimating water content of soils from electrical resistivity.” Geotech. Test. J., 16(3), 323–329.
Keller, G. V., Frischknecht, F. C., and Cullen, A. (1966). Electrical methods in geophysical prospecting, Pergamon Press, Oxford, U.K.
Kibria, G. (2011). “Determination of geotechnical properties of clayey soil from resistivity imaging (RI).” M.S. thesis, Univ. Texas–Arlington, Arlington, TX.
Lambe, T. (1958). “The structure of compacted clays.” J. Soil Mech. Found. Div., 84(2), 2–34.
McCarter, W. (1984). “The electrical resistivity characteristics of compacted clays.” Geotechnique, 34(2), 263–267.
Mitchell, J., and Soga, K. (2005). Fundamentals of soil behavior, Wiley, Hoboken, NJ.
Pozdnyakov, A., Pozdnyakova, L., and Karpachevskii, L. (2006). “Relationship between water tension and electrical resistivity in soils.” Eurasian Soil Sci., 39(S1), S78–S83.
Raney, J. A., Allen, P. M., Reaser, D. F., and Collins, E. W. (1987). “Geologic review of proposed Dallas Fort Worth area site for the superconducting super collider SSC.” Rep., Underground Tunneling Advisory Panel at SSC Laboratory at Lawrence Berkeley Laboratory, Bureau of Economic Geology, Austin, TX.
Rinaldi, V. A., and Cuestas, G. A. (2002). “Ohmic conductivity of a compacted silty clay.” J. Geotech. Geoenviron. Eng., 128(10), 824–835.
Rouquerol, J., Avnir, D., Fairbridge, C. W. Everett, D. H. Haynes, J. H. Pernicone, N., Ramsay, J. D. F., Sing, K. S. W. and Unger, K. K. (1994). “Recommendations for the characterization of porous solids.” Pure Appl. Chem., 66(8), 1739–1758.
Saarenketo, T. (1998). “Electrical properties of water in clay and silty soils.” J. Appl. Geophys., 40(1–3), 73–88.
Shah, P., and Singh, D. (2005). “Generalized Archie’s law for estimation of soil electrical conductivity.” J. of ASTM Int., 2(5), 1–19.
Thompson, G. (1967). “Ground water resources of Ellis county, Texas.” Rep. 62, Texas Water Development Board, Austin, TX.
USGS. (2010). “Geologic units in a given geographic area.” 〈http://tin.er.usgs.gov/geology/state/fips-unit.php?code=f48139〉 (May 25, 2011).
Yang, J. S. (2002). “Three dimensional complex resistivity analysis for clay characterization in hydrogeologic study.” Ph.D. thesis, Univ. of California–Berkeley, Berkeley, CA.
Information & Authors
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 12 • December 2012
Pages: 1520 - 1529
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Aug 15, 2011
Accepted: Feb 27, 2012
Published online: Mar 1, 2012
Published in print: Dec 1, 2012
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