Paper Title:
High Resolution Electrical Resistance Profiling of Laboratory Soil Specimens
  Abstract

An electrical needle-size probe is developed to effectively assess one-dimensional spatial variability of laboratory soil specimens in high resolution. A calibration procedure is also presented to determine resistance from the measured complex impedance. The capability of the developed electrical needle probes to resolve interfaces and spatial variability is explored using sand specimens prepared by various conditions. The complex impedance is measured 0.2~0.5 mm for every specimen. Results show that the coefficient of variation increases as the size of the probe reaches the size of the particle while a very large ratio of probe size to grain size would decrease the detectability of local soil variations due to averaging effects and smoothening. The attainable spatial resolution depends on the needle diameter: submillimetric resolution is typically achieved in laboratory applications and it can be scaled for field applications. The local electrical parameters permit one to infer the soil porosity and the electrolyte conductivity.

  Info
Periodical
Key Engineering Materials (Volumes 321-323)
Edited by
Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi
Pages
1399-1402
DOI
10.4028/www.scientific.net/KEM.321-323.1399
Citation
J. S. Lee, G. C. Cho, E. S. Hong, "High Resolution Electrical Resistance Profiling of Laboratory Soil Specimens", Key Engineering Materials, Vols. 321-323, pp. 1399-1402, 2006
Online since
October 2006
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Price
$32.00
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