Geo-electric assessment of the compacted sand-bentonite mixes

Wayal, V and Sitharam, TG (2019) Geo-electric assessment of the compacted sand-bentonite mixes. In: International Journal of Geotechnical Engineering, 16 (1). pp. 74-89.

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Abstract

In the present study, geoelectric properties of sand-bentonite mixes (used widely as barriers and buffer material) are evaluated using electric resistivity technique(ERT) combined with conventional geotechnical characterization methods. This paper discusses an experimental study to enhance the reliability of ERT for characterizing compacted sand-bentonite mixes for a wide range of applications. The electrical resistivity tests were conducted using fabricated small-scale soil resistivity box conforming to ASTM G57-06. on individual soil types (fine sand, medium sand, bentonite), as well as fine sand and medium sand mixed with different bentonite content. Based on observations, electrical resistivity/conductivity of sand-bentonite mixes are found different for fine and medium sand because of difference in their surface conductivity due to presence of bentonite, which is also represented through the developed correlations. The influence of parameters such as volumetric water content, dry-density, void-ratio, bentonite content and temperature on electrical resistivity values are also studied.

Item Type:	Journal Article
Publication:	International Journal of Geotechnical Engineering
Publisher:	Taylor and Francis Ltd.
Additional Information:	The copyright for this article belongs to the Taylor and Francis Ltd.
Keywords:	bentonite; correlation; electrical property; electrical resistivity; geoelectric field; geotechnical property; nondestructive testing; reliability analysis; sand; soil mechanics; void ratio; water content
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	14 Jul 2022 08:39
Last Modified:	14 Jul 2022 08:39
URI:	https://eprints.iisc.ac.in/id/eprint/74396

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