The shear of clays of varying plasticity against interfaces of different materials and varying roughness has been studied in the ring shear apparatus. Results are compared with the shearing resistance of clay-on-clay. Particular attention has been paid to shearing resistance with large displacements, and the influence of the interface in changing the shearing mode. The effect of corrosion of steel interfaces has been examined, as has the effect of fast shearing.
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Lemos et al. (2000) studied this question.
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