Question

In an unconfined compression test, the maximum unconfined compression strength that the soil sustained was 200 kPa. Determine A. undrained shear strength​

Answer 1

Answer:

Unconfined Compression Test is a special type of Unconsolidated – Undrained (UU) test that is commonly used for clay specimens. It is special case of a triaxial compression test. In this test the confining pressure (3) is 0. In this, cylindrical soil specimen (with height to diameter ratio of 2 to 2.5) is loaded axially by a compressive force until failure takes place. No rubber membrane is necessary to encase the specimen. The vertical compressive stress is the major principal stress (1) and the other two principal stresses are zero. This test may be conducted on undisturbed or remoulded cohesive soils. It cannot be conducted on coarse-grained soils such as sands and gravels as these cannot stand without lateral support. Also the test is essentially a quick or Undrained one because it is assumed that there is no loss of moisture during the test, which is performed fairly fast.

Explanation:

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