Soil Triaxial Test

The GCTS Soil Triaxial Test Systems (STX Series) are designed to perform conventional triaxial tests at the highest level of reliability and accuracy while also being versatile enough to perform more advanced procedures, such as the K₀ test and stress/strain path tests. This system also provides the necessary versatility to easily perform dynamic tests for liquefaction, resilient modulus, and cyclic strength. These systems includes all the necessary hardware and software to automatically perform all triaxial stages including saturation, consolidation, and easily created cyclic and static customized test procedures. It allows creation of an unlimited variety of waveforms including user-generated profiles such as a digitized earthquake record. The system software provides advice for the user as to how to perform testing tasks.

Summary results for individual test specimens can be generated in report format and files can be merged to produce a Mohr envelope plot for up to five specimens. The software will also automatically calculate the shear modulus and hysteretic damping for dynamic tests. Data acquired from all the software modules can be easily transferred to other programs like spreadsheets, databases, etc.

The standard systems can also be upgraded in order to test unsaturated soils and frozen soils. True triaxial testing systems are also available to provide increased control over the stress paths of the soil specimen during shearing. Systems are available to perform these true triaxial tests on both cubical and hollow cylindrical specimens.

Relevant Standards

ASTM D2850 Standard Test Method for Unconsolidated-Undrained Triaxial Compression Test on Cohesive Soils

ASTM D4767 Standard Test Method for Consolidated Undrained Triaxial Compression Test for Cohesive Soils

ASTM D7181 Method for Consolidated Drained Triaxial Compression Test for Soils