VJ Tech has developed a Simple Shear Testing System, used to carry out a direct simple shear test to determine the shear modulus of a soil sample. The sample is contained within confining rings under applied normal load and is sheared along a predefined plane until it is stressed to failure.

The apparatus is microprocessor controlled, has inbuilt data logging and is supplied complete with a lever loading device, hanger and sample unit (with mould and confining rings), all mounted on a floor standing frame. Horizontal and vertical loads and displacements are measured as required and passed to the controlling Clisp Studio software which conforms to ASTM D6528-07.

Main Advantages

·       Passive height control

·       Built-in graphics display and keypad for local operation

·       Stepper motor control for horizontal loading

·       RS232 interface for PC control

Specification

·       Vertical Load – 5kN

·       Horizontal Load – 5kN

·       Horizontal Travel – 20mm

·       Speed Range (Standard) – 0.0001-10.0000 mm/min

·       Fast Speed Forward – 10 mm/min

·       Fast Speed Reverse – 10 mm/min

·       Power - 240V 50Hz 1ph

·       Weight - 113Kg

·       Dimensions (W x D x H) - 1200 x 500 x 1400mm

Clisp Studio Direct Simple Shear Software Module

Requires Windows operating System:

·       XP (Service Pack 3 or later)

·       Vista

·       Windows 7

·       Windows 8

Switchable between 5 languages (English, French, Spanish, Polish & Chinese)

Data stored in MS SQL database

Data export in industry standard formats

Features

• Conforms to ASTM D6528-07
• Direct Simple Shear Tests (static/dynamic)
• Consolidation and Shear stages for up to 4 specimens
• Automatic start/stop of test/machine
• Customisable System Units
• Easy instrument and equipment setup and calibration
• Tests can be set up and run on an individual client, job, borehole and sample basis
• Easy test setup using wizard style Assistant
• User configurable data logging
• E-mail test status
• Live view of sensor readings and status
• Live Data Views:
  • Consolidation Data View (Measured Input Parameters, Settlement, Voids Ratio, t95, Normal Stress)
  • Shear Data View (Measured Input Parameters, Vertical Settlement, Horizontal Displacement, Shear Stress, Normal Stress, Shear Strain)
  • Shear Results Data View (Peak Shear Stress, Settlement at Peak Shear Stress, Vertical Settlement, Voids Ratio)
• Live graphical display of logged and calculated data:   
  • Consolidation Graph (Time vs Axial Strain)
  • Shear Graphs:       
    • Stress Strain Curve (Shear Strain vs Shear Stress)
    • Normal Stress Graph (Time vs Normal Stress)
    • Axial and Shear Stress Curve (Effective Axial Stress vs Shear Stress)
    • Logarithmic Shear Modulus & Strain Graph (Shear Strain vs. Secant Shear Modulus)
• Live tabular display of logged and calculated data:
  • Consolidation Table (Time, Vertical Displacement Input, Vertical Load Input, PWP Input, Settlement, Axial Strain, Normal Stress)
  • Shear Table (Time, Horizontal Displacement Input, Horizontal Load Input, Vertical Displacement Input, Vertical Load Input, PWP Input, Horizontal Displacement, Vertical Settlement, Shear Stress, Normal Stress, Shear Strain, Secant Shear Modulus, Axial Strain)
• User configurable views, graphs and tables (customisable from Input, Measured and Result data)
• Standard predefined presentation reports:
  • Summary Report
  • Consolidation Graph
  • Consolidation Table
  • Shear: Strain vs. Stress and PWP Graph
  • Shear: Log Strain vs. Log Shear Modulus Graph
  • Shear: Effective Axial Stress vs Shear Stress Graph
  • Shear: Shear Strain vs. G/Effective Control Stress Graph
  • Shear Table
• Customised presentation reports on request