DEFINITIONS. 2.1 Triaxial Compression Test—the triaxial compression test a test in which a cylindrical specimen of soil or rock encased in an impervious membrane is subjected to a confining pressure and then loaded axially to failure in compression.

What is the purpose of triaxial test?

A triaxial test is performed on a cylindrical core soil or rock sample to determine its shear strength. The triaxial test attempts to replicate the in-situ stresses (stresses in the original place the soil sample was taken) on the core soil or rock sample.

What is triaxial compressive strength?

triaxial compression test A test for the compressive strength in all directions (compare UNIAXIAL COMPRESSION TEST) of a rock or soil sample, using a triaxial cell. Tests in which drainage is prevented are called 'undrained' tests and the strengths obtained are 'undrained' strengths.