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Laboratory Vane Apparatus

The laboratory Vane Shear Apparatus measures the shear strength of cohesive soils and is particularly useful for soils with low shear strength. Vane shear 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.

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.
 
Easy motorized attachment
Easy update this manual system with a motorized unit and achieve a constant rate of rotation.
 
Holding sampling tube
Optional attachments to accommodate the use of sample tubes up to 100 mm, sample jars or special container are available. This will hold the container rigid relative to the apparatus eliminating any errors during the test.

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The laboratory Vane Shear Apparatus measures the shear strength of cohesive soils and is particularly useful for soils with low shear strength. Vane shear 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.

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.
 
Easy motorized attachment
Easy update this manual system with a motorized unit and achieve a constant rate of rotation.
 
Holding sampling tube
Optional attachments to accommodate the use of sample tubes up to 100 mm, sample jars or special container are available. This will hold the container rigid relative to the apparatus eliminating any errors during the test.

  • Easy preliminary test: a rapid method of determining soft soil shear strength, when an immediate value is required.
  • Ready to use: Supplied with a 12.7 x 12.7mm Standard Vane and set of four calibrated springs.
  • Easy to upgrade: Simple upgrade from manual to motorized versions.
  • Alternative configurations: Supplied with a 200mm base plate for standard specimen molds and sample containers. The optional attachment will also firmly hold sample tubes up to 100 mm, sample jars or a special container.
  • BS 1377:7
  • ASTM D4648
  • Vane 12.7 x 12.7 mm included
  • Four calibrated springs each with deflection/load
  • Weight: 11 kg approx.
  • Dimensions: 620 x 250 x 280 mm (H x W x D)  

27-WF17D30

Laboratory Vane Apparatus for soil shear strengh determination. Supplied with: 12.7 mm x 12.7 mm vane and set of four calibrated springs each of deflection/load chart.

27-WF17D30/2

Motorized actuator for laboratory vane apparatus conforming to BS 1377:7. 220V-50Hz-1ph

27-WF17D30/2Y

Motorized actuator for laboratory vane apparatus conforming to BS 1377:7. 220V-60Hz-1ph

27-WF17D30/3

Motorized actuator for laboratory vane apparatus conforming to ASTM D4648. 220V-50Hz-1ph

27-WF17D30/3Y

Motorized actuator for laboratory vane apparatus conforming to ASTM D4648. 220V-60Hz-1ph

27-WF17D30/4

Motorized actuator for laboratory vane apparatus conforming to ASTM D4648. 110V-60Hz-1ph

27-WF1731

Standard vane 12.7mm x 12.7mm (spare part)

27-WF1732

25.4mm x 25.4mm Vane for use with laboratory vane apparatus

27-WF1733

12.7mm x 25.4mm high Vane for use with laboratory vane apparatus

27-WF1734

12.7mm x 19mm high Vane for use with laboratory vane apparatus

27-WF1735/A

Set of kgf calibrated springs for laboratory vane apparatus (Model 27-WF17D30)

27-WF1738

Attachment for sampling tube or cylindrical container

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