Critical appraisal of the Casagrande percussion and fall cone liquid limits of fine-grained soils

Prakash, K and Sridharan, A (2019) Critical appraisal of the Casagrande percussion and fall cone liquid limits of fine-grained soils. In: International Journal of Geotechnical Engineering, 16 (3). pp. 318-326.

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Abstract

The Casagrande percussion method and the fall cone method are being followed to determine the liquid limit of fine-grained soils worldwide. The liquid limits obtained by these two methods have been observed by many to be not the same. In this article, an attempt is made to show that the values of liquid limit obtained by the Casagrande percussion method and the fall cone method are two different soil properties, which cannot be used synonym to each other. The experimental data documented in the geotechnical engineering literature and also from the authors’ files are analysed critically from the clay mineralogical composition point of view. The analysis has revealed the following: The liquid limit obtained by the Casagrande percussion method is a soil rheological property. The liquid limit obtained by the fall cone method is basically a mechanical property of the soil.

Item Type:	Journal Article
Publication:	International Journal of Geotechnical Engineering
Publisher:	Taylor and Francis Ltd.
Additional Information:	The copyright for this article belongs to the Taylor and Francis Ltd.
Keywords:	clay; cohesion; experimental study; fine grained sediment; geotechnical engineering; liquid limit; mechanical property; rheology; shear strength; soil property
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	14 Jul 2022 09:05
Last Modified:	14 Jul 2022 09:05
URI:	https://eprints.iisc.ac.in/id/eprint/74397

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