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← ScienceWhich outcome occurs when applying shear stress to a saturated clay soil?
A)Volume decrease due to effective stress
B)Increased permeability with lower consolidation
C)Dilatancy induces matric suction increase✓
D)Reduced undrained shear strength due to cavitation
💡 Explanation
Dilatancy occurs because shear strain causes the soil to expand, increasing pore volume. This pore expansion requires water, generating matric suction. As a result, dilatancy induces matric suction, rather than consolidation, because volume expands therefore generating suction.
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