Extension Tests on Soft Clays without Membranes

by T. S. Ramanatha Iyer, (M.ASCE), Prof. of Civ. Engrg. (Post-Grad. Studies); Coll. of Engrg., Trivandrum, Kerala, India,

Serial Information: Journal of the Soil Mechanics and Foundations Division, 1973, Vol. 99, Issue 6, Pg. 485-489

Document Type: Journal Paper


This note describes a method of conducting extension tests under decreasing effective stresses on soft clays without the use of rubber membranes. Particulars of samples, test conditions, and failure stresses are given. Typical stress-strain curves are presented. Examination of test results shows that both types of tests—those with and without rubber membranes—are in general agreement regarding failure stresses, deformations, and pattern of fracture.

Subject Headings: Stress strain relations | Soil tests | Clays | Soft soils | Membranes | Effective stress | Failure analysis | Soil stress

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