2008f engi 6723 guest lecture mcafee - triaxial
TRANSCRIPT
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Triaxial Testing
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Q-Test
(for quick test)
S-test(for slow test)
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Typical Stress-Strain
Curves for CU Tests
Principal (effective) stressratio is a simple way tonormalize the stress
behaviour with respectto "3during the test
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Typical Stress-Strain
Curves for UU Tests
a)
Remolded and some compacted clays
b) Medium sensitive undisturbed clay
c) Highly sensitive undisturbed clay
Note: max. !"occurs
at relatively low strains
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Typical Mohr failure
envelopes for UU Tests
100% saturated clay
Partially saturated clay
Increased cell pressurecompresses any air voids
All samples have same
water content and voidratio therefore the
same undrained shearstrength
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Interpreting Scatter in Test Results
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