MECHANICAL BEHAVIOUR OF UNSATURATED CLAY ACCORDING TO THE TEMPERATURE
The paper describes the thermo-hydro-mechanical behaviour of a sandy clay material on saturated and unsaturated triaxial paths. Unsaturated drained triaxial compression tests on normally consolidated samples were carried out at constant temperatures varying from 22 to 80℃. Desaturation of samples were carried out by the imposition of suctions using the osmotic method. This required the development of a new triaxial cell equipped with a collar heating and an osmotic pedestal which allows the circulation of an osmotic solution of Poly Ethylen Glycol (PEG) 6000, in contact with the sample via a dialysis membrane.The principal phenomena simultaneously related on the temperature and saturation were highlighted, in particular the hardening of material on isotropic path, a secant modulus which deacreases with temperature and increases with suction, a light reduction in the maximum stress on deviator path at high temperature and the increase in this maximum stress when suction increases.
Said Taibi Moulay-Smain Ghembaza Jean-Marie Fleureau Nabil Abou-Bekr
Laboratory of Mechanics, Physics and Geosciences, University of Le Havre, France Laboratory MSS-Mat, Ecole Centrale de Paris, France Laboratory EOLE, University of Tlemcen, Algeria
国际会议
南京
英文
309-313
2007-04-21（万方平台首次上网日期，不代表论文的发表时间）