Rock Shear Interface


The Rock Shear Interface (RSI) is a versatile system capable of performing the consolidation and shearing phases for natural and artificial rock joints on rock cores up to 83 mm (3.26 in) in diameter, direct and residual shear on soils as well as for determining the interface frictional properties of soil and geosynthetics on sample sizes up to 150 mm x 150 mm ( 6.00 in x 6.00 in).

The system consists of a computer controlled unit that utilizes micro stepper motors to control and apply verticals load and horizontal displacements. Built-in electronics control test and display data in real time. The computer controlled program runs under the latest Windows platform. It includes the capability to display the current status of latest and graphically portray the progress of the test in real time. The system also includes the capability for the operator to alter the test process and conditions at any stage during the test.

This is a turnkey system that includes hardware and software for recording all test input data and settings of selected test parameters, performing standard engineering calculations on the data, and producing graphically plotted and printed output in accordance with current testing standards. 


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

Windows XP, Vista, 7 friendly user interface

Fully automated incremental consolidation, direct and residual, and interface shear testing capabilities options 


ASTM D-5607

ASTM D-5321

ASTM 3080/T236

ASTM D-2435/T216 

                     TECHNICAL SPECIFICATIONS 

CAPACITY13 kN (3,000 lbs.)
MOTORStepper motor with built-in controls
VERTICAL MOTORStepper motor with built-in controls for vertical load
HORIZONTAL MOTORStepper motor with built-in controls for horizontal load
SPEED RANGE0.00003 to 10 mm per min. (0.000001 to 0.40 in per minute)
DIMENSIONS/ WEIGHTWidth = 432 mm (17 in); Length = 902 mm (35.5 in); Height
HORIZONTAL TRAVEL75 mm (3.00 in.) resolved to 0.002 mm (0.00008 inches)
VERTICAL TRAVEL50mm (2.0 in.) resolved to 0.002 mm (0.00008 inches)
POWER110/220 V, 50/60 Hz, 1 phase
RSI-ShearTrac-II13 kN (3,000 lbs.) frame capacity
Geo-NETTM-PCNetwork card and cable to link RSI-ShearTrac-II frame to PC
RSI-SHEARSoftware package to automatically run consolidation and direct residual shear test either load or displacement control
SHEAR.REPORTEditing/reporting software package
150 mm (6.00 in) shear ringsFor direct residual and interface shear test

For viewing forms of the report and the interface of the operating program click the mouse on a corresponding miniature.