One-dimensional compression model for solidified silt based on theory of disturbed state concept

The low-carbon, environmental-friendly magnesia cement is used to solidify the silt, and the compression characteristics of the solidified silt at different ages are investigated based on the one-dimensional compression tests. A series of one-dimensional compression tests on the magnesia cement-cured silt under different curing ages are carried out using a new ring knife sample preparation method. It is found that there exists an obvious inflection point, structural yield stress, on the ln(1+e)-lgσ¢_v curve, which is similar to structural soils. Moreover, the structural yield stress of the solidified silt increases gradually with the increase of the curing age. Furthermore, an one-dimensional compression model to characterize the strengthening and weakening properties coexisted in the magnesia cement-solidified silt is proposed based on the concept of disturbed state. The experimental results show that the proposed model can reproduce well the one-dimensional compression characteristics of the solidified silt at any age.