Ring Shear Testing System (Bromhead)

Ring Shear Testing System (Bromhead)

to BS1377-7 & ASTM D6467

British StandardBS1377-7
Approx. Weight (kg)105
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This Ring Shear Testing System (Bromhead) is a torsional shear device, which produces accurate and repeatable test results to determine the residual shear strength of cohesive soils, which is particularly important when assessing slope stability.

The apparatus features a digital display and control panel and can be computer controlled through the USB port. It is supplied on a floor mounted frame for stability. A consolidation load is applied to the annular ring sample through a lever arm. Rotational shear displacement is applied to the sample by a microprocessor controlled stepper motor, through a fixed ratio gearbox, and measured by a pair of load rings.

The rotational shearing action is applied continuously until a constant residual strength value is achieved. The advantages of
a ring shear machine are that there is no change in the area of the cross section of the shear plane as the test proceeds, and the sample can be sheared through an uninterrupted displacement of any magnitude, making it very suitable for determining the residual strength of clays.

Apparatus Features:

  • Digital display and control panel
  • Lever loading actuation of normal stress via dead weights
  • Partial or complete test automation using software, as below

Software Features:

  • Easy Test configuration using the built in wizard
  • Transducer Configuration and Calibration
  • Live views of transducer readings & calculated parameters
  • Live graphs and tabulated data
  • User configurable views tables and graphs
  • Data export to Excel & test script export and import
  • Data storage in an SQL database
  • Configurable Test automation
  • Live Test status and notification

System Components:

1 x Ringshear Apparatus (Bromhead) with Stand and Data Acquisition
1 x Ringshear Interface Top Cap Assembly
2 x 0.5 kN Load Ring with Digital Dial Gauge
2 x 1 kN Load Ring with Digital Dial Gauge
1 x Digital Dial Gauge (Vertical Displacement)
1 x Junction Box
1 x Set of weights (50 kg)
1 x Ring Shear Software

Sample Size 100 mm outside diameter x 70 mm inside diameter x 5 mm thick
Speed Range 0.0001 degrees/min to 900 degrees/min
Maximum Shear Stress 1000 kPa
Maximum Normal Stress 1000 kPa
Dimensions (W x D x H) 1335mm x 380mm x 1400mm
Weight 105kg
Electrical Requirement 90-240 Volts, 50/60Hz 1ph