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3 cards from this section. Quick, good the night before a test.
What does the unconfined compression test measure?
Think about what happens when you compress soil without lateral support.
What is the confining pressure (σ3) during this test?
Recall the definition of 'unconfined'.
What is the maximum axial stress in an unconfined compression test known as?
Focus on 'unconfined'.
True or False: The unconfined compression test can only be performed on saturated soils.
Think about the flexibility of testing conditions.
A new construction site shows soil with an unconfined compressive strength of only 50 kPa at a moisture level of 90%. What recommendations would you give regarding using this soil?
Focus on the relationship between strength and moisture levels.
If Mohr's Circle indicates that the major principal stress is 150 kPa while running an unconfined compression test, what can you conclude about the soil's safety under reinforcement?
Consider factors of safety in your response.
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