Use of fall-cone flow index for soil classification: a new plasticity chart

Paul J. Vardanega; Stuart K. Haigh; Brendan C. O'Kelly

doi:10.1680/jgeot.20.P.132

Use of fall-cone flow index for soil classification: a new plasticity chart

Paul J. Vardanega, Stuart K. Haigh, Brendan C. O'Kelly

Research output: Contribution to journal › Article (Academic Journal) › peer-review

14 Citations (Scopus)

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Abstract

Use of the Casagrande-style plasticity chart to classify fine-grained soils using Atterberg’s liquid and plastic limits is ubiquitous in geotechnical engineering. This classification is dependent on the thread-rolling and Casagrande-cup tests, which are both more operator dependent than the fall-cone liquid limit test. This paper shows that the slope of the data acquired during the fall-cone liquid limit test (the fall-cone flow index) can be used to redraw the plasticity chart, thus allowing classification of fine-grained soils to be achieved solely from fall-cone liquid limit data.

Original language	English
Pages (from-to)	610-617
Number of pages	8
Journal	Géotechnique
Volume	72
Issue number	7
Early online date	8 Mar 2021
DOIs	https://doi.org/10.1680/jgeot.20.P.132
Publication status	Published - 1 Jul 2022

Bibliographical note

Publisher Copyright:
© 2022 Thomas Telford Ltd.

Keywords

laboratory tests
soil classification
standards & codes of practice
statistical analysis

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10.1680/jgeot.20.P.132

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abstract = "Use of the Casagrande-style plasticity chart to classify fine-grained soils using Atterberg{\textquoteright}s liquid and plastic limits is ubiquitous in geotechnical engineering. This classification is dependent on the thread-rolling and Casagrande-cup tests, which are both more operator dependent than the fall-cone liquid limit test. This paper shows that the slope of the data acquired during the fall-cone liquid limit test (the fall-cone flow index) can be used to redraw the plasticity chart, thus allowing classification of fine-grained soils to be achieved solely from fall-cone liquid limit data.",

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AU - Haigh, Stuart K.

AU - O'Kelly, Brendan C.

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N2 - Use of the Casagrande-style plasticity chart to classify fine-grained soils using Atterberg’s liquid and plastic limits is ubiquitous in geotechnical engineering. This classification is dependent on the thread-rolling and Casagrande-cup tests, which are both more operator dependent than the fall-cone liquid limit test. This paper shows that the slope of the data acquired during the fall-cone liquid limit test (the fall-cone flow index) can be used to redraw the plasticity chart, thus allowing classification of fine-grained soils to be achieved solely from fall-cone liquid limit data.

AB - Use of the Casagrande-style plasticity chart to classify fine-grained soils using Atterberg’s liquid and plastic limits is ubiquitous in geotechnical engineering. This classification is dependent on the thread-rolling and Casagrande-cup tests, which are both more operator dependent than the fall-cone liquid limit test. This paper shows that the slope of the data acquired during the fall-cone liquid limit test (the fall-cone flow index) can be used to redraw the plasticity chart, thus allowing classification of fine-grained soils to be achieved solely from fall-cone liquid limit data.

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KW - soil classification

KW - standards & codes of practice

KW - statistical analysis

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EP - 617

JO - Géotechnique

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Use of fall-cone flow index for soil classification: a new plasticity chart

Abstract

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Keywords

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