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Large Direct / Residual Shear Test System

What is the Direct/Residual Shear test?

Large Direct Residual Shear Data Sheet
Sample Geotechnical Report

ShearTrac III

The ShearTrac III system is capable of performing the consolidation and shearing phases of a 305 x 305 x 205 mm (12 x 12 x 8 in) direct or residual shear test on soil/aggregate under fully automated control with convenient monitoring and instant test results. It consists of a computer-controlled unit using independent, electromechanical micro-stepper systems to apply the vertical and horizontal loads to soil specimens. With its high load capacity, broad range of testing flexibility, and overall ease of use the ShearTrac III is the preferred large shear machine on the market.

Applicable Test Standards

  • ASTM D3080
  • AASHTO T 236
  • BS 1377-7
  • ISO/TS 17892-10
  • AS 1289.6.2.2


  • Stress (load) or strain (displacement) control
  • Fully automated via computer or standalone capability for control and data collection
  • Micro-stepper, electronic motor systems offer precise loading and shearing
  • More accurate, reliable, and easier to maintain than units requiring hydraulics or air pressure
  • Immediately produce reports according to test standards
  • Front panel display and keypad for observation and control of the test
  • Geo-Net compatibility allows access and control over a computer network
  • System flexibility to perform Interface Shear for soils and geosynthetics (geomembrane, geotextile, GCL, geogrid, etc.) as well as determining the interface frictional properties of soil and geosynthetics and internal frictions of GCLs


  • Choose load capacity up to 160 kN (35,000 lbs) vertical and up to 115 kN (25,000 lbs) horizontal
  • Accurate displacement rate control from 0.00003 to 7.5 mm/min (0.000001 to 0.3 in/min)
  • Vertical travel: 100 mm (4.00 in)
  • Horizontal travel: +/- 100 mm (4.00 in)
  • Gripping plates optional

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