Poisson's ratio is an important parameter for the study of the behaviour of rocks in various contexts of rock engineering. Some studies have indicated that suction has an effect on Poisson's ratio of argillaceous rocks and that there is a non-linear response of this feature for other types of rocks during the loading process. Nevertheless, an assessment that couples the dependence of Poisson's ratio on stress and suction is still lacking. This study addresses this through a detailed analysis of axial and radial deformations during uniaxial compression tests on specimens at equilibrium under several different suction conditions using the moving point regression technique. Experimental results show a non-linear variation of Poisson's ratio with stress and that suction has a significant influence on it. The model proposed to couple the effect of suction and stress on Poisson's ratio of argillaceous rocks presents higher prediction performance.
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March 2017
Research Article|
February 20 2017
Effect of suction and stress on Poisson's ratio of argillaceous rocks
J. M. Espitia;
J. M. Espitia
*Department of Civil and Environmental Engineering, Universidad de Los Andes, Bogotá, Colombia.
†Mining Engineering Department, UPTC, Sogamoso, Colombia.
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B. Caicedo;
B. Caicedo
*Department of Civil and Environmental Engineering, Universidad de Los Andes, Bogotá, Colombia.
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L. Vallejo
L. Vallejo
‡Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, PA, USA.
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Publisher: Emerald Publishing
Received:
September 26 2016
Revision Received:
January 02 2017
Accepted:
January 25 2017
Online ISSN: 2045-2543
ICE Publishing: all rights reserved
2017
Geotechnique Letters (2017) 7 (1): 53–59.
Article history
Received:
September 26 2016
Revision Received:
January 02 2017
Accepted:
January 25 2017
Citation
Espitia JM, Caicedo B, Vallejo L (2017), "Effect of suction and stress on Poisson's ratio of argillaceous rocks". Geotechnique Letters, Vol. 7 No. 1 pp. 53–59, doi: https://doi.org/10.1680/jgele.16.00138
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