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COMPRESSIVE RHEOLOGY : AN OVERVIEW

Compressive rheology, or the behaviour of suspensions in sedimentation and compression has been widely studied and many theories, using different physical quantities, have evolved in parallel. This review article provides a basis for the reconciliation of these approaches via presentation of the Buscall-White (1987) approach to consolidation, which uses a compressive yield stress, Py(φ), and a hindered settling factor, R( φ), to quantify the strength of a particle network in compression and the inter-phase drag respectively, and linking it to other theories and related de-watering parameters available in the literature. The links between behaviour of a concentrated particle system in shear and compression are then discussed and a review of the various experimental methods available for determination of the dewatering parameters is presented. The final section overviews the practical application, benefits and limitations of models for real de-watering processes.