Accession Number:

AD0756171

Title:

Residual Strength of Clay and Clay-Shales by Rotation Shear Tests

Descriptive Note:

Corporate Author:

HARVARD UNIV CAMBRIDGE MA SOIL MECHANICS LAB

Personal Author(s):

Report Date:

1970-06-01

Pagination or Media Count:

224.0

Abstract:

The objectives of this investigation were to develop a rotation shear machine to measure the residual shear strength constant shearing resistance at which material undergoes continuous deformation under a constant state of effective stress of clays and clay-shales investigate testing errors and measure residual shear strengths of representative types of highly plastic clays and clay-shales. In the rotation shear test, torque is applied to the bottom of the specimen and two force transducers measure the couple necessary to maintain the upper half of the specimen stationary. Disc-shaped or annular specimens with thicknesses from 0.1 to 2.5 cm and outside diameters of 7.11 cm can be tested. Variations in residual shear strength were investigated for normally consolidated versus overconsolidated specimens, for specimens sheared at different rates of peripheral displacement, and for specimens prepared by several different remolding procedures.

Subject Categories:

  • Soil Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE