Abstract
A series of oedometer tests were performed on both undisturbed and remolded samples of Lianyungang clays to investigate the secondary compression behavior. The results of natural clays show that the coefficient of secondary compression, Cα, reaches the maximum dramatically in the vicinity of the consolidation yield stress. When the consolidation pressure is less than the yield stress (termed as pre-yield state), the creep can be neglected. But Cα decreases with the increase in consolidation stress in the post-yield state (i.e. the consolidation pressure being greater than the yield stress), similar to remolded samples. In addition, it is found that there is a unique relationship between the difference in coefficient of secondary compression, (C α -C α * ), and the difference of void index (∆Iv) between undisturbed and remolded samples. Furthermore, a simple method is proposed for predicting secondary compression index of natural clays.
Published Version
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