Comparison between hydrometer and laser diffraction methods in the determination of clay content in fine-grained soils

A. Lopez, H. Gustavsson*, L. Korkiala-Tanttu

*Corresponding author for this work

Research output: Contribution to journalConference articleScientificpeer-review

2 Citations (Scopus)
78 Downloads (Pure)

Abstract

Clay content is the main characterizing parameter when classifying fine-grained soils. Hydrometer method (HD) is commonly used in geotechnics to obtain the grain size distribution properties of fine-grained soils. However, this test is laborious and time consuming as compared to alternative methods such as laser diffraction (LD). In this study, a comparison between the results for clay content of 19 samples from different locations in Finland using HD and LD methods was carried out aiming at obtaining a mathematical expression that allows to transform LD measurements into HD results. The results were statistically compared showing significant differences between the results of these two techniques and underestimation of the clay content by the LD method was observed. Based on the results, the reliability of the laser method in the determination of clay content is discussed.

Original languageEnglish
Article number012012
Number of pages10
JournalIOP Conference Series: Earth and Environmental Science
Volume710
Issue number1
DOIs
Publication statusPublished - 26 Apr 2021
MoE publication typeA4 Conference publication
EventNordic Geotechnical Meeting: Urban Geotechnics - Virtual, Online, Helsinki, Finland
Duration: 18 Jan 202119 Jan 2021
Conference number: 18
https://www.ril.fi/en/events/ngm-2020.html

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