Interface Shear Tester (GDSIST)

GDS Interface Shear Tester (GDSIST)

Advanced System for Interface Friction Testing in Geotechnical Applications

The GDSIST (Interface Shear Tester) is a compact, high-precision apparatus designed to evaluate shear strength at interfaces between soil and construction materials such as geomembranes, pipeline coatings, or foundation footings. With electro-mechanical control of axial and torsional forces, the GDSIST allows engineers and researchers to simulate in-situ interface conditions under controlled laboratory settings.

Ideal for both academic research and practical testing, the GDSIST delivers repeatable, accurate results across a wide range of material types, including corrosive samples—thanks to stainless steel options and submersible load cells.

Key Features of Interface Shear Tester (GDSIST)

• Interface Friction Testing: Evaluate friction behavior between soil and construction materials under varying shear and normal stresses.

• Electromechanical Control: Precise axial force and displacement control via GDS actuators with local keypad and display.

• Rotational Base Pedestal: Enables continuous torsional shear with variable speed control.

• Internal Submersible Load Cell: Provides accurate axial force readings, eliminating errors from seal friction.

• Stainless Steel Option: Enables testing of corrosive or chemically aggressive specimens.

• Compact Footprint: Space-saving benchtop design for any lab setup.

• Optional Ring Shear Upgrade: Expandable functionality for advanced shear behavior studies.

Applications of Interface Shear Tester (GDSIST)

• Geomembrane-Soil Interface Testing: Assess friction and bonding between liner materials and native soil.

• Pipeline & Foundation Research: Evaluate base interface behavior of buried structures under axial and torsional loads.

• Material Compatibility Studies: Simulate various field conditions using interchangeable top caps with differing roughness.

• Custom Soil Mechanics Research: Ideal for universities and research labs conducting advanced soil-structure interaction studies.