Centrifuge assessment of the effects of polymer treatment on penetrometer response

Research output: Contribution to journalArticle

Abstract

A series of cone and T-bar penetration tests were undertaken in a beam centrifuge on two samples of the same material prepared and consolidated from a low plasticity slurry, where one sample had undergone polymer treatment with a high molecular weight polymer and the other was untreated (UT). The material had previously been characterised through a series of comparison laboratory tests, under UT and polymer-treated (PT) conditions. The results of the centrifuge testing indicated significant differences with respect to penetrometer response, with the PT material dilating and UT contracting at high penetration rates. Further, the penetrometer results provided significantly different inferences of the material type and behaviour between the two samples - inferred differences that were in some cases contradictory to laboratory results. The implications of these results for in situ investigations of PT tailings deposits are outlined.

Original languageEnglish
Pages (from-to)240-252
Number of pages13
JournalInternational Journal of Physical Modelling in Geotechnics
Volume18
Issue number5
DOIs
Publication statusPublished - 1 Sep 2018

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penetrometer
Centrifuges
centrifuge
polymer
Polymers
penetration test
Tailings
tailings
slurry
Plasticity
plasticity
Cones
penetration
Deposits
Molecular weight
effect
material
Testing

Cite this

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title = "Centrifuge assessment of the effects of polymer treatment on penetrometer response",
abstract = "A series of cone and T-bar penetration tests were undertaken in a beam centrifuge on two samples of the same material prepared and consolidated from a low plasticity slurry, where one sample had undergone polymer treatment with a high molecular weight polymer and the other was untreated (UT). The material had previously been characterised through a series of comparison laboratory tests, under UT and polymer-treated (PT) conditions. The results of the centrifuge testing indicated significant differences with respect to penetrometer response, with the PT material dilating and UT contracting at high penetration rates. Further, the penetrometer results provided significantly different inferences of the material type and behaviour between the two samples - inferred differences that were in some cases contradictory to laboratory results. The implications of these results for in situ investigations of PT tailings deposits are outlined.",
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AU - Fourie, Andy

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AB - A series of cone and T-bar penetration tests were undertaken in a beam centrifuge on two samples of the same material prepared and consolidated from a low plasticity slurry, where one sample had undergone polymer treatment with a high molecular weight polymer and the other was untreated (UT). The material had previously been characterised through a series of comparison laboratory tests, under UT and polymer-treated (PT) conditions. The results of the centrifuge testing indicated significant differences with respect to penetrometer response, with the PT material dilating and UT contracting at high penetration rates. Further, the penetrometer results provided significantly different inferences of the material type and behaviour between the two samples - inferred differences that were in some cases contradictory to laboratory results. The implications of these results for in situ investigations of PT tailings deposits are outlined.

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