Abstract
To examine the effect of the initial soil structure on slaking susceptibility of Tertiary mudstone, one-dimensional compression tests are carried out for three kinds of tertiary mudstone with a different resistance to slaking. These one-dimensional compression properties are simulated by the modified Cam-clay model with Super/subloading yield surface and rotational hardening. The new findings are as follows.(1) The initial stress state of the mudstone with a high resistance to slaking in e-σv space is above the normal consolidation line (NCL) of the clay that was remolded from the mudstone, while the state of the mudstone with a low resistance to slaking is below the NCL.(2) From the model, the mudstone with a high resistance to slaking can be regarded as the high structured and overconsolidated clay, while the mudstone with a low resistance to slaking can be regarded as the heavily overconsolidated and less structured clay.
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