Experimental Investigations of the Stress Path Dependence of Weakly Cemented Sand

Cohesion between grains in a geological system is perhaps the simplest and ideal representation of range material systems including soft rocks, structured soils, mudstones, cemented sands, powder compacts, carbonate sands. This presence inter granular cohesion known to alter ensemble mechanical response when subjected varied boundary conditions. In this study, hollow cylinder apparatus used investigate behavior weakly sand ensembles by mapping state surfaces failure surface (locus peak stress state) plastic flow final state). When these materials are sheared, deformation accumulates due breakdown grains, which introduces lag occurrence ratio maximum dilatancy, unlike typical frictional material. cementation affected changes initial mean effective stress, reconstitution density, intermediate principal (stress path on octahedral plane). The locus, emergent at large strains, was found depend density. Further, parameters extracted for calibration prediction exercise using an elastic constitutive model. several other models, effect considered as additional confinement ensemble. Such approach predicts precisely but does not predict volumetric accurately, especially strains.