Shear and Interface Strength of Clay at Very Low Effective Stress
Pedersen RC, Olson RE, Rauch AF
(Received 17 July 2001; accepted 5 April 2002)

Abstract
Thin-specimen direct shear (TSDS) tests were conducted to measure the shearing strength of kaolinite, and interface strengths between kaolinite and acrylic plastic and anodized aluminum, at normal effective stresses from 1 to 2400 Pa (0.02 to 50 lb/ft²). At the lowest effective normal stresses, curved strength envelopes fitted through the data exhibited no cohesion and high secant friction angles. Accurate information on the behavior of soil in this low-pressure range is needed to properly interpret the behavior of prototype foundations in laboratory-scale model tests.

Keywords:
Clay, direct shear, interface friction, low stress, shear strength, tilt-table

Paper ID: GTJ200310648_261

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Author Pedersen RC, Olson RE, Rauch AF Title Shear and Interface Strength of Clay at Very Low Effective Stress Symposium , Committee on