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A Simple Triaxial Test

     Triaxial testing is used along other testing methods to examine the shear strength of different materials, including soil. It works alongside other testing methods such as Shear Testing and Consolidation Testing to ensure the limits of the material are understood and weaknesses are identified, optimising its performance when supporting a structural frame.

What is Triaxial Testing?

Triaxial testing is used to determine the mechanical structure of soils and any material that are subject to the deformation process or damage. The term Triaxial describes an equal quantity of pressure that is applied to the specimen. It is used to see the effect of pressure when it is applied in different directions i.e. pressure applied in a vertical direction may differ to the results produced from pressure applied in a horizontal direction.

Using a conventional example, a cylindrical soil sample is enclosed with a thin rubber membrane and exposed to confined pressure that is increased at controlled intervals (axial stresses/displacement). The confining pressure and volume change of the sample is controlled by water pressure that surrounds the sample within the chamber.*

A Triaxial test, therefore, is used to decipher the differences between the directions and pressure and the exact moment the rupture will occur; the limit of stability of the specimen is determined, benefitting the engineering project and its structural properties.

Triaxial testing enables us to further our understanding of the fundamental components of the material being sampled, giving us a better picture of what it can withstand and how it will perform in the future.

What Types of Triaxial Testing Are There?

Tests require different methods due to the varying cohesion properties of every material. Depending on the density of the sample, different reactions can result. When performing a Triaxial test there are three common options:

1. Consolidated – Drained.

2. Consolidated – Undrained.

3. Unconsolidated – Undrained.

Why Use VJ Tech:

VJ Tech’s Triaxial testing software is developed at the highest standard, providing you with the best technology that performs excellent tests with accurate results.

Their Triaxial testing equipment includes:

• Load frames.

• Triaxial Cells.

• Load transducers, displacement transducers and pressure transducers.

• Data Loggers.

• Soil Sample Preparation tools.

• Support Stands.

All are provided to ensure that the operator’s time is used effectively and efficient, coherent results are produced.

VJ Tech are the experts in finding the solution to all your testing requirements. They supply Triaxial testing equipment that caters to your requirements without compromising on performance and execution.

VJ Tech has been providing specialist clients with high quality test instruments for over 20 years. Their expertise and experience in the civil engineering industry is second to none, offering guidance and tailoring solutions to detailed and specific requirements.

Their service and support team are quick to respond with a proven track record of customer satisfaction. Get in touch to take advantage of their specialist knowledge and professional experience.

This high calibre of technology cannot be found in the shops; their full catalogue is accessible on their website which includes detailed descriptions of each model’s specifications, software and performance in the field.

VJ Tech offer testing models that are tailored to your needs, so, to discuss your quote and place or order, contact them today:

Telephone +44(0) 118 945 3737

Email: Support:, or, Sales:

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Posted on 2014-02-28, By: *

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Note: The content of this article solely conveys the opinion of its author.

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