The Automatic machine is ideal for testing soil and other materials that contain large particles of up to 20 mm largest dimension. Sample size up to 300 mm square can be tested, with inserts allowing the testing of smaller sample sizes.

The machine work as an automatic stand- alone unit: the test measurements (horizontal and vertical force and displacements) are directly displayed and stored in memory according to pre-set recording modes. Shear box completely made of stainless steel is available for testing on high corrosive materials. The machine includes 100 kN load cell and linear potentiometric transducers 100 and 50 mm travel with mounting brackets and shear box.

The sample is consolidated via a closed loop hydraulic system for the automatic programmable application of the vertical load. The horizontal displacement is driven by an high resolution stepper motor. The machine is entirely managed by the software of a microprocessor unit that reads the processes of force, axial pressure and displacements, manages the motor, the vertical hydraulic loading system and the test steps through closed loop systems. Ten key scratchproof membrane keyboard with large monochromatic graphic display. 

Using a large sample is possible to gain a more representative indication of shear strength. Furthermore, the large shear box can be used to obtain the angle of friction between many materials. Particular applications include the construction of earth dams and other embankment work.

Main Features:

Ideal for testing Shale, Industrial slag, Brick rubble, Colliery spoils

Sample size up to 300 

Automatic hydraulic application of pre-set consolidation steps (up to 50)

Automatic test management from consolidation to failure: the operator is only requested to remove the clamping screws of the shear box

Each single step of axial force can be applied instantaneously or by means of a linear ramp in a pre-set time interval

Straight connection between shear box, drive unit and load cell for the axial transmission of the horizontal force along the shearing plane, instead of the classic “swan neck”

Two models available with different type of Shear box: in coated steel or in stainless steel for testing high corrosive materials

100 kN shear and consolidation force

Steplessly variable speed control from 0 to 11.00000 mm/min

Easy and immediate set up of the test parameters via the large digital graphic display

Possibility to set different speeds and travel (forward and reverse) in the residual shear tests

Different and independent data recording for consolidation and failure.

Technical Specifications:

Sample size: up to 300 mm. Can be reduced to 150 mm using sample insert (see accessories) 

Speed range: step lessly variable from o to 11.00000 mm/min

Maximum travel: 75 mm

Sample height: 150 mm 

Shear and vertical force: 100 kN

Steps of consolidation: up to 50

Power: 2000 W

Overall dimensions: (wxdxh) 1470x758x1570 mm approx.

Weight approx.: 800 kg.