CUED Publications database

Use of fall cones to determine Atterberg limits: A review

O’Kelly, BC and Vardanega, PJ and Haigh, SK (2018) Use of fall cones to determine Atterberg limits: A review. Geotechnique, 68. pp. 843-856. ISSN 0016-8505

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© 2018 ICE Publishing. All rights reserved. This paper reviews the percussion-cup liquid limit, thread-rolling plastic limit (PL) and various fall-cone and other approaches employed for consistency limit determinations on fine-grained soil, highlighting their use and misuse for soil classification purposes and in existing correlations. As the PL does not correspond to a unique value of remoulded undrained shear strength, there is no scientific reason why PL measurements obtained using the thread-rolling and shear-strength-based fall-cone or extrusion methods should coincide. Various correlations are established relating liquid limit values deduced using the percussion-cup and fall-cone approaches. The significance of differences in the strain-rate dependency on the mobilised fall-cone shear strength is reviewed. The paper concludes with recommendations on the standardisation of international codes and the wider use of the fall-cone approach for soft to medium-stiff clays in establishing the strength variability with changing water content and further index parameters.

Item Type: Article
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 27 Oct 2017 20:10
Last Modified: 27 Oct 2020 07:29
DOI: 10.1680/jgeot.17.R.039