Reliability and applicability of the Krumbein-Sloss chart for estimating geomechanical properties in sands

Yejin Kim, Hyoung Suk Suh, Tae Sup Yun

Research output: Contribution to journalArticle

Abstract

This paper describes the reliability of the Krumbein-Sloss chart in estimating the particle shape parameter. Despite its simplicity and subjectivity in choosing roundness and sphericity, its applicability has not yet been completely validated. We compare the computed shape parameters of four different sands from 2D microscopic images with estimated values from the chart by a questionnaire study. The survey results show that the roundness and sphericity tend to be overestimated and underestimated, respectively, regardless of the participants’ expertise on shape analysis. We validate the reliability of a previous regression in literature for extreme void ratios and newly propose the correlation of critical state void ratio based on roundness and particle gradation. It underscores that the Krumbein-Sloss chart based estimation can be statistically and partially reliable and still applicable in not only estimating shape parameters and but also correlating them with geotechnical properties.

Original languageEnglish
Pages (from-to)117-123
Number of pages7
JournalEngineering Geology
Volume248
DOIs
Publication statusPublished - 2019 Jan 8

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Sand
void ratio
sand
shape analysis
critical state
geotechnical property
parameter
particle

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geology

Cite this

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abstract = "This paper describes the reliability of the Krumbein-Sloss chart in estimating the particle shape parameter. Despite its simplicity and subjectivity in choosing roundness and sphericity, its applicability has not yet been completely validated. We compare the computed shape parameters of four different sands from 2D microscopic images with estimated values from the chart by a questionnaire study. The survey results show that the roundness and sphericity tend to be overestimated and underestimated, respectively, regardless of the participants’ expertise on shape analysis. We validate the reliability of a previous regression in literature for extreme void ratios and newly propose the correlation of critical state void ratio based on roundness and particle gradation. It underscores that the Krumbein-Sloss chart based estimation can be statistically and partially reliable and still applicable in not only estimating shape parameters and but also correlating them with geotechnical properties.",
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Reliability and applicability of the Krumbein-Sloss chart for estimating geomechanical properties in sands. / Kim, Yejin; Suh, Hyoung Suk; Yun, Tae Sup.

In: Engineering Geology, Vol. 248, 08.01.2019, p. 117-123.

Research output: Contribution to journalArticle

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