Triaxial Cell Equipment
Testing accessories and preparation equipment
TRX Soil Triaxial Cell

The stainless steel construction of the GCTS TRX Soil Triaxial Cell makes for a sturdy device which will yield extremely accurate testing results.


  • Stainless steel construction
  • 1,000 kPa (150 psi) capacity
  • External cell wall with internal tie rods
  • Top and bottom drainage
  • Stiff, low-friction loading piston and graphite seal
  • External or internal load cells and LVDTs
  • Three standard triaxial cells for 70 mm, 100 mm, and 150 mm specimen diameters
  • Optional large-scale triaxial cells for testing specimens up to 1,000 mm (40 in.) diameter available
  • Optional cell with 2,000 kPa capacity available


The GCTS Soil Triaxial Cell (TRX-100/200/300) is constructed of stainless steel with a see-through Plexiglas external cell wall. After a specimen is loaded for testing, the external cell wall is lowered over the cell and fastened into place, resulting in minimum disturbances to the specimen. All the standard triaxial cells can accommodate smaller diameter specimens using optional platens. These triaxial cells accept specimens with a length of approximately 2.5 times the diameter.


Standard units come with a set of top and bottom stainless steel or anodized platens, porous stones, all necessary O-rings, and reinforced metal rings. The ductility of metal rings offers an additional safety factor in case the acrylic cell wall is accidentally damaged. At the bottom of the cell are valves and quick disconnect fittings for top drainage & pore pressure, bottom drainage & pore pressure and chamber filling & emptying. Five bleed ports located at the high points are also provided to completely remove air bubbles remaining while filling the cell with water.


The loading piston diameter for the 70 mm cell is a 15.9 mm (5/8 in.) stainless steel shaft and 25.4 mm (1 in.) for the 100 mm and 150 mm cells. A stainless steel, extra-precision ball bearing guides the loading shaft. Both swivel loading buttons and rigid threaded connectors are provided with these cells. The swivel buttons allow the top cap to rotate during loading.


The threaded adaptor is used for a rigid connection, which forces the axial deformation to be uniform. Stress reversal is easily applied with this adaptor.


Up to eight feed-through ports to connect internal instrumentation can be added as an option. Other optional devices are available upon request.


Model . . . . . . . . Max. Specimen Diameter

TRX-100 . . . . . . . . . . 70 mm
TRX-200 . . . . . . . . . . 100 mm
TRX-300 . . . . . . . . . . 150 mm