Clayey soils, among other features, are characterized by their strong tendency to undergo significant creep deformations. It is also a well-accepted fact that the primary consolidation phase involves creep deformation. However, there are still contradicting opinions on the effect of creep during primary consolidation phase of clays. As a result two distinct schools of thoughts, referred to as creep hypotheses A and B, have been used as a basis of discussion to assess the effect of creep during the primary consolidation phase. In this work the implication of the two creep hypotheses are illustrated and then evaluated based on relevant and high quality laboratory tests. The test tests are seen to be in excellent agreement with creep hypothesis B and can numerically be described using elaso-viscoplastic formulation.
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