IIT Gandhinagar  ajanta@iitgn.ac.in  ap@iitgn.ac.in
Soil Testing Lab

Introduction Experimental Setup Data Analysis Results Theory

Consolidated Drained (CD) Triaxial Test

Need and Scope:

Determination of strength and stress-strain relationships of a cylindrical specimen of "undisturbed" or "reconstituted" specimens. The soil specimens are isotropically consolidated and sheared in compression with drainage at a constant rate of axial deformation.


CD tests can be performed on all types of soils. Drainage is allowed in both phases of triaxial testing; isotropic consolidation & shearing. Soil is consolidated under a chosen confining pressure; and after completion of consolidation it is tested for shear by applying deviator stress gradually at slow strain rate while allowing full drainage. It takes more time to complete a test as compared to CU test, and commonly known as "slow" test, which is seldom conducted except for research interest.

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