Some aspects of the behaviour of compacted soils along wetting paths

Abstract

International audienc

Hydro-mechanical behavior from small strain to failure of tuffs amended with dune sand – Application to pavements design in Saharan areas

“…In fact, pavements in Saharan regions undergo repeated drying-wetting cycles and are therefore susceptible to problems of swelling-shrinkage, which have a real impact on their stability and durability. In the literature, the effect of drying-wetting cycles on the volumetric behavior of different compacted soils has been extensively investigated [21][22][23][24][25][26][27][28]. Useful correlations relating swelling indices to the liquid limit were also proposed [29,30] for practical purposes.…”

Editorial: partial saturation in compacted soils

“…The present issue has, instead, a more applicative focus with contributions covering barrier systems for underground disposal of nuclear waste, earth dams and embankments, as well as a study of lime-treated compacted clays. The first three contributions in the present issue are dedicated to the sub-theme 'application to engineering problems and case studies' (Alonso et al, 2011a;Gens et al, 2011;Thorel et al, 2011) while the last two contributions are devoted to the sub-theme 'material characterisation' (Taibi et al, 2011;Tang et al, 2011).…”

“…The technical note by Taibi et al (2011) closes this issue by presenting wetting/drying tests performed on four different soils used for the construction of earth dam cores in southern France and north-western Algeria. For each soil, multiple samples are compacted with the same effort at different water contents on both sides of the optimum value and then subjected to suction changes under unconfined conditions.…”

Suction and strength of unsaturated soils

“…The same approach was applied to specimens compacted at wet of optimum and dried to specific water contents. The equivalent  values are also supplemented with data from the literature (Table 6- (Oloo and Fredlund 1996, Leong et al 2003, Taibi et al 2011.…”