Geotechnical Testing Systems All Products Resources

Interface Shear Test System

What is the Interface Shear test?

Interface Shear Data Sheet
Sample Geotechnical Report

ShearTrac III

The ShearTrac III system is capable of performing the consolidation and shearing phase of a 305 mm x 305 mm (12 in x 12 in) direct shear test under automatic control for soils and geosynthetics (geomembranes, geotextile, GCL, geogrid, etc.) as well as determining the interface frictional properties of soil and geosynthetics, and internal friction of GCLs.

Applicable Test Standards

  • ASTM D3080, D5321, D6243
  • AASHTO T 236
  • BS 1377-7


  • Choose load capacity to fit user needs up to 160 kN (35,000 lbs) vertical and 115 kN (25,000 lbs) horizontal
  • Built-in end clamps for geosynthetics testing
  • Optional grip plates for true internal friction determination for GCLs
  • Linear bearings for minimum horizontal friction
  • Two sets of limit switches to prevent over traveling
  • Built-in 4-channel data acquisition with 16-bit resolution
  • Two LCD display
  • Displacement transducers with +/- 45 mm (1.75 in.) range and 0.002 mm (0.00008 in.) resolution
  • Two low profile load cells
  • Accurate displacement rate control from 0.00003 to 10 mm/min (0.000001 to 0.4 in/min)
  • Built-in electronic controls for automatic display of data and control of test
  • Fully automated incremental consolidation test capability

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