COHESION AND DILATANCY OF SANDS STABILIZED BY CHEMICAL GROUT

To elucidate the mechanical behaviour of sands strengthened by cementing materials, we investigate the relation between cohesion (i. e. cohesive bonds made by silicate gel) and dilatancy of stabilized sand in shearing process. In experiments, triaxial drained tests, triaxial undrained tests, and constant mean principal effective stress tests were performed. The conclusions are summarised as follows;1) Although the dilatancy initiation of stabilized sands in shearing process is delayed by cohesion as compared with unstabilized sands, the dilatancy is much larger than that of unstabilized sands when the axial deformation increases to a certain degree.2) Cohesion would be uniquely related to evd (volumetric strain caused by shear stress increment only) rather than the shear strain, irrespective of the confined stress and drain or undrained condition.