Small Strain, Low Shear Rate Rheometry of Cohesive Sediments
Elastic and yield phenomena of cohesive sediments are usefully studied with pulse shearometry and an applied stress rheometer combined with vane geometry. These sediments are elastico-viscous materials at volumetric concentrations ϕ equal to or greater than the critical concentrations ϕ SF at which a space-filling network exists in the sediment. Vane geometry provides reliable estimates of yield stress (Γ y ) in fresh, undisturbed sediment. Γ y and shear rigidity modulus G are strongly dependent on ϕ.
KeywordsApplied Stress Wall Slip Cohesive Sediment Volumetric Concentration Applied Torque
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