Swelling phenomena and effective stress in compacted expansive clays

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F16%3A10330844" target="_blank" >RIV/00216208:11310/16:10330844 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1139/cgj-2014-0479" target="_blank" >http://dx.doi.org/10.1139/cgj-2014-0479</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1139/cgj-2014-0479" target="_blank" >10.1139/cgj-2014-0479</a>

Result language

angličtina

Original language name

Swelling phenomena and effective stress in compacted expansive clays

Original language description

The central aim of this paper is to discuss the applicability of the effective stress principle as defined by Terzaghi (total stress minus pore-water pressure) to predict the behaviour of expansive clay aggregates. Phenomena occurring between individual clay minerals are reviewed first at the molecular level obtained in the colloid science research. In particular, it is noted that, for interparticle distances higher than approximately 1.5 nm, the pore-water pressure in the bulk equilibrium solution forms an additive component of the interparticle disjoining pressure. It is concluded that for these distances Terzaghi's effective stress principle should be adequate to describe the clay behaviour. To support these developments, an extensive experimental database of nine different sodium and calcium bentonites available in the published literature was analysed. With the aid of double structure constitutive modelling, procedures were developed to extract information about the behaviour of clay aggregates from the experimental measurements. It was then shown that unconfined water retention curves, swelling pressure tests, swelling under constant load tests, and mechanical unloading tests are all uniquely related in terms of the dependency of dry density (or void ratio) of clay aggregate versus mean effective stress. By considering reversibility of aggregate behaviour and full saturation of aggregates, this implies that the effective stress principle is a valid way of predicting expansive clay aggregate volumetric deformation.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Canadian Geotechnical Journal

ISSN

0008-3674

e-ISSN

—

Volume of the periodical

53

Issue of the periodical within the volume

1

Country of publishing house

CA - CANADA

Number of pages

14

Pages from-to

134-147

UT code for WoS article

000370040200012

EID of the result in the Scopus database

2-s2.0-84953402819