The Krumbein-Sloss chart has widely been used as a conventional method with its simplicity and subjectivity in evaluating particle shape parameters. However, its applicability in estimating roundness and sphericity has not yet been validated. We perform a questionnaire study of four sand samples from 2D microscopic images to estimate shape parameters from the chart, and compare it with the theoretically computed values. The results of chart estimation show that the roundness and sphericity tend to be overestimated and underestimated than the computed values, respectively by questionnaires. By the chart-based estimation, we verified the regression model about shape parameters with index void ratio in previous literature, and also proposed a new regression equation to correlate the critical state friction angle. It indicates that the Krumbein-Sloss chart based estimation for quantifying the shape parameters shows statistically meaningful and can be used for correlating geomechanical property as well as predicting shape parameter.
|Publication status||Published - 2020|
|Event||16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019 - Taipei, Taiwan, Province of China|
Duration: 2019 Oct 14 → 2019 Oct 18
|Conference||16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019|
|Country/Territory||Taiwan, Province of China|
|Period||19/10/14 → 19/10/18|
Bibliographical noteFunding Information:
This work was supported by the Land and Housing Institute (LHI) grant funded by the Korea Land and Housing Corporation and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (2016R1A2B4011292).
Copyright © Soil Mechanics and Geotechnical Engineering, ARC 2019.All rights reserved.
All Science Journal Classification (ASJC) codes
- Geotechnical Engineering and Engineering Geology