DBPapers
DOI: 10.5593/SGEM2014/B12/S2.074

MECHANICAL BEHAVIOR OF DESTRUCTURATED EXPANSIVE CLAY

E. Olinic, T. Ivasuc, S. Manea
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-08-7 / ISSN 1314-2704, June 19-25, 2014,Book1, Vol. 2, 581-588 pp

ABSTRACT
Clayey soils are very sensitive to environmental conditions, especially to variations in moisture content, temperature and vegetation. Cycles of drying-wetting and freezingthawing influence the structure and texture of clays causing important damages. The aim of this study was to observe the changes appeared in the soil structure when a representative sample of clay was subjected to drying-wetting and freezing-thawing cycles. The simulations made in this study reveal the influence that destructuration have on the behavior of an unprotected embankment constructed from expansive clays or stabilized clays after a number of hydration-dehydration and freezing-thawing cycles. Also it was observed the variation on shearing strength parameters of destructurated clay. The study points out the importance of variation of moisture content and temperature in ensuring the stability of the slope areas.

Keywords: clay destructuration, drying-wetting, freezing-thawing, shear strength parameters