Rock Shear Interface

PDFProduct Specification PDFSample Geotechnical Report


The Rock Shear Interface (RSI) is a fully automated versatile system, capable of performing the following tests with the appropriate software and sample confinement hardware: Incremental consolidation up to 32 steps, Direct and residual shear on natural and artificial rock joints up to 83 mm (3.26 in) diameter, Direct and residual shear on soils up to 150 mm (6.00 in) square or round samples, Interface friction between soils and geosynthetics, Direct simple shear with Teflon coated stacked rings. This system utilizes high-precision micro-stepper motors for both the vertical and horizontal load and displacement controls.

Applicable Test Standards

  • ASTM D-5607
  • ASTM D-5321
  • ASTM 3080/T236
  • ASTM D-2435/T216


  • 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
  • Stand alone capability
  • Horizontal displacement transducers with 75 mm (3.00 in.) range and 0.002 mm (0.00008 in.) resolution
  • Vertical displacement transducers with 50 mm (2.00 in.) range and 0.002 mm (0.00008 in.) resolution
  • Two universal load cells with 11 kN ( 2,500 lbs.) capacity.
  • Accurate displacement rate control from 0.00003 to 15 mm per minute (0.000001 to 0.6 in. per minute)
  • Built-in electronic controls for automatic display of data and control of test
  • Fully automated incremental consolidation, direct and residual, and interface shear testing capabilities options
Request More Information Rock Shear Interface

Specifications also available in the following languages:

PDF Chinese