Abstract
AbstractExperimental results from a comprehensive series of suction-controlled, consolidated drained (CD) triaxial tests, conducted on statically compacted specimens of unsaturated silty sand, are presented. The experimental program was accomplished in a newly implemented, fully automated double-walled triaxial test system via the axis-translation technique. Results were thoroughly analyzed to gain critical insight into some of the essential elastoplastic features of compacted intermediate geomaterials under controlled suction states, including the effect of suction on yield stress, apparent cohesion, tensile strength, and critical state line, as well as postpeak softening and strain-induced dilatancy under suction-controlled monotonic shearing. Constitutive parameters postulated by the Barcelona basic model (BBM) were then experimentally calibrated and used for prediction of compacted silty sand response at matric suction states that varied from 50 to 750 kPa. Predicted values of deviatoric stress at cri...
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