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Compression–permeability characteristics of mineral sediments evaluated with analytical photocentrifuge

Compression–permeability characteristics of mineral sediments evaluated with analytical photocentrifuge,10.1016/j.ces.2010.12.041,Chemical Engineering

Compression–permeability characteristics of mineral sediments evaluated with analytical photocentrifuge   (Citations: 1)
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This work discusses applications of analytical photocentrifuge LUMiSizer for estimation of the low-pressure compression–permeability characteristics of aqueous calcium carbonate sediments. Two approaches for estimation of compressibility–permeability parameters were tested. These approaches are based on (1) analysis of equilibrium height of sediment H∞ versus centrifugal rotation speed Ω and (2) analysis of kinetic curves of the consolidation ratio U(t) at different rotation speeds Ω. The approach (1) allowed fair fitting of experimental H∞ (Ω) data with parameters pa=70.9±0.9Pa and β=0.1777±0.0005 in Tiller's equation relating the volume fraction φ and solid pressure ps. The two independent approaches (1) and (2) evidenced the presence of the scaling law relating consolidation coefficient C and solid pressure ps, C∝psγ with the similar exponents γ≈0.85±0.03 (for the studied solid pressure region 5kPa≤ps≤75kPa).
Journal: Chemical Engineering Science - CHEM ENG SCI , vol. 66, no. 6, pp. 1296-1305, 2011
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