Stone consolidation test

Comparison of permeability values measured in the laboratory, and computed from consolidation tests have been reported by Nickerson (1978) and Olsen and Daniel (1979). In addition, Nickerson and Olsen and Daniel both show that the direct determination of permeability gives higher values than back-calculating values from consolidation tests. Nickerson suggests that the discrepancy between the direct determination of permeability in the laboratory and back calculated from the consolidation test are due to the variation of hydraulic gradients and/or the formation of a filter cake at the sediment-porous stone interface during consolidation. Olsen and Daniel (1979) attribute at least part of the discrepancy to the fact that Terzaghi s consolidation theory makes no adjustment for the structural viscosity (creep) of the soil. However permeability derived from one-dimensional consolidation tests may provide sufficiently accurate information for preliminary analyses. 

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