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Geotechnical and Geological Engineering

, Volume 37, Issue 6, pp 4649–4673 | Cite as

Enhanced Engineering Characteristics of Soils by Electro-Osmotic Treatment: An Overview

  • B. K. Pandey
  • S. RajeshEmail author
State-of-the-Art Review
  • 244 Downloads

Abstract

The electro-osmotic treatment for stabilizing fine-grained soils is gaining importance in the field of geotechnical engineering. There is absolute evidence that during the electro-osmotic treatment, the basic index, physicochemical and engineering properties of the soils was found to be modified. A review of the enhanced engineering characteristics of soils due to electro-osmotic treatment is presented in this paper. In addition, a brief description of the critical factors that affect the efficiency of electro-osmotic treatment is presented. This review intends to summarize the results obtained from the several field-based case studies and laboratory-based experimental studies to understand the variation in the water content, Atterberg limits, permeability, seepage, consolidation, shear strength, mineralogical and physicochemical characteristics of the soil due to electro-osmotic treatment. Based on the review, it can be inferred that usage of electro-osmotic treatment for stabilizing the fine-grained soils is beneficial, and its higher efficiency can be obtained by selecting suitable electrodes and devising the scheme appropriately for the polarity reversal and current intermittences.

Keywords

Soft soil Soil improvement Electro-osmotic treatment Electro-osmosis Voltage gradient 

Abbreviations

A

Area

E

Electrical field intensity or voltage gradient

Eo

The standard electrode potential

Ec

Energy consumed

EO

Electro-osmosis

EOt

Electro-osmotic treatment

EVDs

Electrical vertical drains

EKGs

Electrokinetic geosynthetics

I

Current

k

Electrical conductivity of the soil

ke

The coefficient of electro-osmotic permeability

kh

Coefficient of hydraulic permeability

l

Length between the electrodes

n

Porosity of the soil

Pj

Type of gradient

p

Unit power consumption

PRWC

Percentage reduction in water content

t

Total time

v

Sample volume

USSI

Undrained shear strength increment

V

Mean applied voltage

Tj

Type of flow

Q

Discharge

αij

Coupling coefficient

ρ

Electrical resistance

εw

Permittivity of the water

ζ

Zeta potential of the soil

μ

Viscosity of the pore fluid

γw

Unit weight of water

Δσ

Effective stress increment

Notes

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Authors and Affiliations

  1. 1.Department of Civil EngineeringIndian Institute of Technology KanpurKanpurIndia

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