Shear Testing Equipment

Shearmatic EmS is a standalone automatic machine with Electromechanic Servoactuation for direct/residual shear testing. It can also automatically perform the oedometric consolidation tests using the dedicated accessories.  It incorporates two high-resolution stepper motors with high precision transmissions.

27-WF21E80: SHEARMATIC EmS – Electromechanical Servoactuated technology, automatic direct and residual shear testing machine. 220-100 V / 50-60 Hz / 1 ph

Main features:
  • Electromechanical servoactuation. Dead weights and air compressor are not required making the test easy and accurate
  • User interface 6” touch screen colour display for numerical and graphical plotting of the readings
  • Maximum vertical force: 10 kN
  • Maximum horizontal force: 10 kN
  • Two displacement transducers measuring vertical settlement and horizontal displacement
  • Two load cells measuring vertical and horizontal force
  • Vertical force load cell directly mounted on the loading tip assuring high accuracy of the readings and of the control signal
  • Infinitely variable speed from 0.00001 to 15.00000 mm/min
  • High stiffness load chain shear box - driving head - load cell
  • USB pen drive for unlimited storage capacity and TXT format data output
  • Optional PC control via LAN port and dedicated software
  • Sturdy shear box techno-polymeric carriage untouchable by corrosion
  • Test velocity and travel (forward and reverse) adjustable (residual shear test)
  • Number of consolidation steps adjustable from 1 to 99 and number of shear cycles adjustable from 1 to 50 
  • Axial force steps can be applied instantaneously as required by the standard 
  • Also suitable for the oedometric consolidation using typical consolidation cells
  • Specific and independent data recording for consolidation and failure stages

Shear box assemblies (ordered separately) are manufactured from brass and designed to contain the water that surrounds the specimen.
They consist of a square box with a rigid walled round or square hole complete with adapter loading pad, retaining plate, 2 grids, 2 perforated grids and 2 porous plates.

Shear box assemblies and accessories / spares:
27-WF0215/B: Shear box assembly for 60 mm square specimens
  • 27-WF0215/B2: Loading pad for 60mm square samples
  • 27-WF0215/B3: Retaining plate for 60mm square samples
  • 27-WF0215/B5: Plane grid for 60mm square samples
  • 27-WF0215/B6: Perforated grid for 60mm square samples
  • 27-WF0215/B7: Sample cutter for 60mm square samples
  • 27-WF0215/4: Porous plate for 60mm square samples
  • 27-WF0215/8: Extrusion dolly for 60mm square samples
27-WF0216/B: Shear box assembly for 100 mm square specimens
  • 27-WF0216/B5: Plane grid for 100mm square samples
  • 27-WF0216/B6: Perforated grid for 100mm square sample
  • 27-WF0216/B7: Sample cutter for 100mm square samples
  • 27-WF0216/4: Porous plate for 100mm sqauare samples
  • 27-WF0216/8: Extrusion dolly for 100mm square samples
27-WF0217/B: Shear box assembly for 50 mm dia. round specimens
  • 27-WF0217/B7: Sample cutter for 50mm dia samples
  • 27-WF0217/4: Porous plate for 50mm dia samples
  • 27-WF0217/8: Extrusion dolly for 50mm dia samples
27-WF0218/B: Shear box assembly for 60 mm dia. round  specimens
  • 27-WF0218/B7: Sample cutter for 60mm dia samples
  • 27-WF0218/4: Porous plate for 60mm dia round samples
  • 27-WF0218/8: Extrusion dolly for 60mm dia samples
27-WF0219/B: Shear box assembly for 63.5 mm dia. round specimens
  • 27-WF0219/B7: Sample cutter for 63.5mm dia samples
  • 27-WF0219/4: Porous plate for 63.5mm dia samples
  • 27-WF0219/8: Extrusion dolly for 63.5mm dia samples
27-WF0222/B: Shear box assembly for 100 mm dia. round specimens
  • 27-WF0222/B7: Sample cutter for 100mm
  • 27-WF0222/4: Porous plate for 100mm
  • 27-WF0222/8: Extrusion dolly for 100mm
The laboratory Shear Vane Apparatus measures the shear strength of cohesive soils and is particularly useful for soils with low shear strength. Shear vane testing is a fast and economical method of measuring the shear strength of clay compared with elaborate tri-axial shear or direct shear tests.
This apparatus tests undrained strength of soils, both in undisturbed and remoulded conditions.

27-WF17D30: Laboratory Vane Apparatus for soil shear strength determination
Supplied with:
- 12.7 mm x 12.7 mm vane
- set of four calibrated springs each with deflection/load chart
 
Vanes (ordered separately):
27-WF1732: 25.4 mm x 25.4 mm vane
27-WF1733: 12.7 mm x 25.4 mm vane
27-WF1734: 12.7 mm x 19 mm vane
 
Optional upgrade with a motorized actuator for a constant rate of rotation
(to be ordered separately):
27-WF17D30/2: to BS 1377:7 Standard,  Speed 6 to 12 °/min, 220V,50Hz,1Ph
27-WF17D30/3: to ASTM D4648 Standard, Speed 60 to 90 °/min, 220V,50Hz,1Ph

Holding sample tube attachment:
27-WF1738 Attachment for sampling tube or cylindrical container  
 
Spares:
27-WF1731: 12.7 mm x 12.7 mm vane
27-WF1735/A: Set of kgf calibrated springs for laboratory vane apparatus  

How it works:
The laboratory Vane Apparatus derives from an original design by the UK based Transport Research Laboratory. The vane  is held in a rotating socket situated in the lower part of the vane head assembly. This socket rotates in a ball seating.
 
Four calibrated springs are supplied, each with a deflection/load chart.  
 
If the vane is prevented from rotating and the hand knob is turned clockwise, the circular graduated scale rotates, and a torque is applied to the springs.  The load applied can be determined by noting the angular deflection from the graduate scale and by reading the relevant spring calibration chart.
If the vane is permitted to rotate, the amount of vane deflation can be seen on the secondary scale.