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Several methods for measuring the compressive strength of strong particulategels are available, including the centrifuge method, whereby the strength as afunction of volume-fraction is obtained parametrically from the dependence ofequilibrium sediment height upon acceleration. The analysis used conventionallydue to Buscall & White (1987) ignores the possibility that the particulatenetwork might adhere to the walls of the centrifuge tube, even though manytypes of cohesive particulate gel can be expected to. The neglect of adhesionis justifiable when the ratio of the shear to compressive strength is small,which it can be for many systems away from the gel-point, but never very nearit. The errors arising from neglect of adhesion are investigated theoreticallyand quantified by synthesising equilibrium sediment height versus accelerationdata for various degrees of adhesion and then analysing them in theconventional manner. Approximate correction factors suggested by dimensionlessanalysis are then tested. The errors introduced by certain other approximationsmade routinely in order to render the data-inversion practicable are analysedtoo. For example, it shown that the error introduced by treating theacceleration vector as approximately one-dimensional is minuscule for typicalcentrifuge dimensions, whereas making this assumption renders the datainversion tractable.

Correction of Wall Adhesion Effects in the Centrifugal Compression of Strong Colloidal Gels