Effets de leau et du temps sur le comportement des matériaux granulaires avec des ruptures des grains
Tipo de publicación : Conferencia No A* ni AAbstract
It is well known that the mechanical behavior of crushable granular materials depends on the water content: the higher the material humidity, the higher the breakage ratio and the more compressible the material. However, the relation between loading and flooding conditions and the evolution of grading is not clear. Therefore, this paper presents an extensive experimental program on sand to study the effects of water and time. The results show that, for a given initial density and stress path, after flooding the dry material reaches the equivalent behavior of the saturated case in terms of compression curve, particle breakage and creep compressibility index. Moreover, the relation between the breakage ratio and the final volume is unique and it does not depend on the stress path, the point of flooding nor the loading condition (time of creep or relaxation), but only on intrinsic parameters. These findings could give a support for the prediction of the mechanical response of weathered materials through constitutive models based on grading.