Imperial Lab Equipments Pvt. Ltd.
Imperial Lab Equipments Pvt. Ltd.
Imperial Lab Equipments Pvt. Ltd. Imperial Lab Equipments Pvt. Ltd. Imperial Lab Equipments Pvt. Ltd. Imperial Lab Equipments Pvt. Ltd. Imperial Lab Equipments Pvt. Ltd. Imperial Lab Equipments Pvt. Ltd.
Imperial Lab Equipments Pvt. Ltd.
Imperial Lab Equipments Pvt. Ltd. Imperial Lab Equipments Pvt. Ltd. Imperial Lab Equipments Pvt. Ltd.

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Soil Triaxial Shear Test

A triaxial shear test is a method to measure the Engineering properties of many deformable solids, soil, sand, clay.

Basic Concept
The principle behind a triaxial shear test is that the stress applied in the vertical direction can be different than the stress applied in the horizontal directions. This produces a non-hydrostatic stress state, which contains shear stress. The triaxial testing apparatus is designed to measure that limit. The stress on the platens is increased until the material in the cylinder fails and forms sliding regions within itself, known as shear bands. A motion where a material is deformed under shear stress is known as shearing.



Types of Triaxial Tests

In case of consolidated test, the test is then carried out by a first stage of applying confining pressure in the pressure chamber and allowing drainage of the sample. This stage corresponds to the consolidation of the sample. The deviatoric load is then applied through the vertical axis. The deviatoric stress is indeed the difference between the vertical stress and the confining stress. During the deviatoric compression, the drainage valves can be open (CD) or closed (CU & UU).

Triaxial test data, in general, include evolution of axial and volumetric strain, deviatoric and isotropic stress, and pore pressure evolution. From the triaxial test results, it is possible to deduce the shear strength parameters, namely friction angle, cohesion, dilatancy angle and the other dependent parameters.
Test Standards

Imperial Lab Equipments Pvt. Ltd.

Triaxial test equipment consists of following Assemblies :
Vaccum Assembly
Pressure Assembly
Loading Unit
A thirty different speed motorized load frame with capacity 50 kn.
Software Programming
A complete source of calculations of UU, CD, CU Bar triaxial test. Has option for manual as well as automatic recording of data.
Consolidation curves and evaluates t100 and calculates strain rates depending upon the drainage condition. Stress strain curves after every curves.Plots pore water pressure and volumetric strain vs. effective stress ratio vs. axial strain. p-q plot, Mohr columb graph.

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