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Clay Mineral Effects on the Stress-Strain Response of Soils in Direct Shear

Published online by Cambridge University Press:  01 January 2024

Robert L. Kondner  and
José R. Vendrell Jr.
Robert L. Kondner
Affiliation:
The Technological Institute, Northwestern University, Evanston, Illinois, USA
José R. Vendrell Jr.
Affiliation:
The Technological Institute, Northwestern University, Evanston, Illinois, USA Ponce, Puerto Rico, USA
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Abstract

More than one hundred sets of direct shear tests were conducted on soils composed of four reference clay minerals and various combinations of the four clay minerals of the Columbia University Clay Mineral Standards Project (A.P.I. 49) to illustrate with quantitative results the influence of clay mineralogy on the stress-strain characteristics of soils and hence the practical importance of clay mineralogy in soil mechanics. The soils tested consisted of various amounts by weight of Bedford Indiana Halloysite, Mesa Alta New Mexico Kaolinite, Santa Rita New Mexico Montmorillonite and Fithian Illinois Illite prepared with distilled water. The experimental results agree quite well with hyperbolic stress-strain relations previously developed by the author. The Hvorslev strength parameters are written as exponential functions of the clay mineral content and are included in the hyperbolic stress-strain law. The ultimate shear strength of the soils are mathematically expressed in terms of the stress history, confinement, and mineralogy.

Type
General Session
Information
Clays and Clay Minerals (National Conference on Clays and Clay Minerals) , Volume 11 , February 1962 , pp. 252 - 267
Copyright
Copyright © The Clay Minerals Society 1962

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