Relationship between electrical resistivity and basic geotechnical parameters for marine clays

Files in This Item:
File Description SizeFormat 
ERTNorwayCombined.pdf485.15 kBAdobe PDFDownload
Title: Relationship between electrical resistivity and basic geotechnical parameters for marine clays
Authors: Long, Michael (Michael M.)
Donohue, Shane
L'Heureux, Jean-Sebastien
et al.
Lecomte, Isabelle
Permanent link:
Date: Oct-2012
Abstract: Recently, considerable efforts have been made in the attempt to map quick clay areas using electrical resistivity measurements. However there is a lack of understanding regarding which soil parameters control the measured resistivity values. To address this issue, inverted resistivity values from 15 marine clay sites in Norway have been compared with basic geotechnical index properties. It was found that the resistivity value is strongly controlled by the salt content of the pore fluid. Resistivity decreases rapidly with increasing salt content. There is also a relatively clear trend of decreasing resistivity with increasing clay content and plasticity index. Resistivity values become very low (≈5 Ω·m) for high clay content (>50%), medium- to high-plasticity (Ip ≈ 20%) materials with salt content values greater than about 8 g/L (or corresponding remoulded shear strength values greater than 4 kPa). For the range of values studied, there is poor correlation between resistivity and bulk density and between resistivity and water content. The data studied suggest that the range of resistivity values corresponding to quick clay is 10 to 100 Ω·m, which is consistent with other published limits. A comparison is made between two-dimensional electrical resistivity tomography (ERT) and resistivity cone penetration test (RCPTU) data for two of the sites and the two sets of data show similar trends and values irrespective of scale effect.
Type of material: Journal Article
Publisher: Canadian Science Publishing
Journal: Canadian Geotechnical Journal
Volume: 49
Issue: 10
Start page: 1158
End page: 1168
Copyright (published version): 2012 Canadian Science Publishing
Keywords: marine clayresistivitysoil design parameters
DOI: 10.1139/t2012-080
Language: en
Status of Item: Peer reviewed
Appears in Collections:Civil Engineering Research Collection

Show full item record

Citations 10

Last Week
Last month
checked on Oct 19, 2018

Page view(s) 50

checked on May 25, 2018

Download(s) 5

checked on May 25, 2018

Google ScholarTM



This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.