There are several variations of the triaxial test and all are covered by our Clisp Studio csTriax, csUNSAT and csSPATH Software Modules to BS, ASTM and AS standards. Our software is designed for automated triaxial testing to minimize the time that the operator is required to be present. We supply all the necessary soil testing equipment including load frames, triaxial cells, load transducers, displacement transducers, pressure transducers, data loggers, soil sample preparation tools and support stands for ease of use. Below are the most common triaxial test types for which you can find Soil Testing Software, Instruments, Equipment, Accessories and Consumables.

Consolidated Drained (CD)

In a consolidated drained triaxial test procedure, the sample is consolidated and sheared in compression with drainage. The rate of axial deformation is kept constant, i.e. is strain controlled. The idea is that the test allows the sample and the pore pressures to fully consolidate (i.e. adjust) to the surrounding stresses. The test may take a long time to allow the sample to adjust, in particular low permeability samples need a long time to drain and adjust strain to stress levels.

Consolidated Undrained (CU)

In a consolidated undrained triaxial test procedure, the sample is not allowed to drain. The shear characteristics are measured under undrained conditions and the sample is assumed to be fully saturated

Unconsolidated Undrained (UU)

In an unconsolidated undrained triaxial test procedure, the sample is not allowed to drain. The sample is compressed at a constant rate (strain-controlled).

Unsaturated Triaxial Testing

In an Unsaturated triaxial test procedure, the equipment must be capable of providing variable suctions whilst providing accurate measurement of soil volume change.