Heard-type gas apparatus

Triaxial (conventional)

Texas A&M, Handin lab B26A

Gas Apparatus

This gear-driven triaxial deformation apparatus employs Argon gas to apply pressure and an internal force gauge, allowing accurate and precise confining pressure, axial stress, and temperature conditions to be achieved and maintained. This apparatus is well-suited to measuring plastic and viscous mechanical properties of single crystals and rocks in triaxial compression on samples 9.5 mm in diameter and 16.5 mm in length (with a stress resolution of 1 MPa). The apparatus can employ confining pressure up to 400 MPa, pore pressure up to 100 MPa, strain rates of 10-7 to 10-4 s-1, and temperatures of 20 to 800 °C.

Loading; Unloading; Heating; Cooling; High Temperature; High Pressure; Mineral Reactions; Hydrothermal Reactions; Elasticity; Elastic Moduli; Yield Strength; Failure Strength; Strength; Creep; Pore Fluid Control; Pore Volume Compaction; Triaxial Stress/Strain; Differential Stress