Soil Mechanics and Foundation
Terzaghi’s theory of one dimensional consolidation assumes

Soil is homogeneous and fully saturated
Deformation of the soil, is entirely due to change in volume
Water and soil particles are incompressible
All listed here

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Soil Mechanics and Foundation
If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then

The liquid limit of soil always increases
The liquid limit of soil may decrease
The liquid limit of soil always decreases
The liquid limit of soil may increase

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