Triaxial Test - Know About the Properties of Construction Material

Triaxial test systems are designed to help you determine the mechanical properties of soils when you need to design embankments, foundations, and other structures. Excavations, building constructions, tunnelling, and other similar applications can affect subsoil structures in many different ways, and these effects can be simulated successfully with a triaxial test. In this test, a specially designed device is used to determine the relationship between stress and strain in undisturbed or recompacted soil samples, which are investigated by subjecting them to different drainage conditions and stress levels.

A triaxial test will help make sure that the soil on your construction site can support the structure, which you want to build on it. It lets you identify soil properties on your site and measure the shear stress the soil can support and if it can support your structure. That way, you can make informed decisions and engineering predictions using valuable soil data, like dilatancy angle, apparent cohesion, and shearing resistance. Advanced triaxial test systems are capable of performing automated triaxial compression tests on remoulded and cylindrical undisturbed soil samples. CU (consolidated undrained), CD (consolidated drained), and UU (unconsolidated undrained) compression tests can run automatically, be controlled and reported using the device.

Some triaxial test systems are designed as universal electro mechanic test machines, which are servo-controlled multiplex machines with a load cell, data acquisition, and control unit, and linear potentiometric transducer. The digital loading system comes with a microprocessor controlled drive system and an advanced servo motor to let you set any test speed through the membrane keyboard. Testing speeds can be set between 0,00001mm/min and 51mm/min. Testing automatically stops when the displacement and load reach a 99 percent value of the measuring range you have set.


Construction material or the soil sample is loaded into specially designed vessels or cells. The cell capacity can tolerate confined pressures that can range up to 1700 kPA, which is suitable for simulating most conditions. Advanced triaxial test systems come with a PC software and data acquisition system for an easier way to retrieve and interpret data. You can manually set the channel gains for higher reading accuracy. 

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