Triaxial Consolidated Undrained Compression Test

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Definition - What does Triaxial Consolidated Undrained Compression Test mean?

A triaxial consolidated undrained compression test is carried out to determine the shear strength of the soil. The pores pressure of the soil is measured and the soil is consolidated under pressure from all around in a triaxial cell before failure is induced by increasing the major principal stress.

The triaxial shear test determines the shear strength of soil i.e. cohesion and angle of internal friction and can be used to measure the total and effective stress of the soil.

Trenchlesspedia explains Triaxial Consolidated Undrained Compression Test

The triaxial consolidated undrained compression test is conducted as per the American Standard for Testing and Materials (ASTM) D4767-11. The measurement of shear characteristics is carried out under undrained conditions.

The triaxial consolidated undrained compression test is applicable to field conditions in which soils that have undergone full consolidation under one set of stresses are subjected to a change in stress without allowing time for further consolidation.

The field stress conditions are similar to those in the test method. The test method provides for the calculation of total and effective stress, axial deformation, pore water pressure, and axial compression by measuring axial load.

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