Automatic Direct Simple Shear Testing Machine for Automatic Triaxial Testing Machine

Direct Simple Shear test description
The test determines the consolidated undrained shear strength of a fine-grained soil specimen under simple shear conditions. The specimen is laterally confined to maintain constant cross-sectional area and sheared at a constant rate while maintaining constant volume, simulating undrained field conditions. The test procedure consists of similar steps to the direct/residual shear test:

• Consolidation phase: a vertical load is applied to the specimen until excess water pressure dissipates, typically indicated by stabilized vertical deformation.
• Shear phase: the shear deformation is applied by tangential displacement of one rigid platen relative to the other.

Enhanced Functionality with Full Autonomy and Remote Control
The system retains all the features and advantages of the base model for Direct/Residual shear testing, the WF21E80 SHEARMATIC EmS, while also offering the capability to perform Direct Simple Shear (DSS) tests in compliance with ASTM D6528.

Thanks to the integrated 6” color touchscreen interface, the entire test can be managed directly from the machine, eliminating the need for an external PC. Data is saved in real time and can be exported in.TXT format via USB drive, ensuring maximum simplicity and traceability.

For users requiring more advanced control or simultaneous management of multiple units, the SHEARMATIC DSS EmS is fully compatible with SOILMASTER T&A software, which allows remote operation from a single PC. Test results can then be processed easily and in compliance with international standards using the new dedicated template available in the SOILMASTER P&R module.

Configurable Versatility
A key advantage of the Shearmatic EmS system is its configurability, which allows users to choose the most suitable version based on their specific testing needs.

• The standard Direct/Residual Shear can be converted into a Direct Simple Shear (DSS) configuration using the dedicated conversion kit.
• The DSS version, can be reconfigured into the Direct/Residual Shear version using the appropriate kit if testing priorities change.