ASTM D3080 | AASHTO T236 | BS 1377:7
CEN-ISO/TS 17892-10 | NF P94-071
This test cover the determination of the consolidated drained shear strength of a soil material in direct shear. The AUTOSHEAR machine is controlled by a microprocessor system which reads and processes horizontal force and displacement readings, manages the motor and the safety controls through closed loop system assuring the following important features:
The microprocessor control system, therefore, allows the machine to work as an automatic stand-alone unit: the test measurements (force and displacements) are directly displayed and stored in memory according to pre-set recording modes. The PC is only temporary required to download the test data via the RS 232 port once the test is completed. The data can be processed by the Direct and residual shear Geo-Analysis templates. See accessories.
The design of the horizontal loading system provides straight-rigid alignment of loading ram, shear box and loading measurement system, to increase the stiffness of transmission of the horizontal force along the shearing plane. Excellent quality and high resistance techno-polymeric material has been adopted for the carriage of the shear box. It offers excellent resistance to corrosion, wear and tear and it is resistant to all chemical found in a soil specimen.
The carriage is light weight and easy to clean.
The machine is supplied without load cell, transducer for horizontal and vertical displacement, Shear box assembly and weights. All these items have to be ordered separately. See accessories. The machine can also be fit with mechanical (analogical) measurement system. Other versions of Shear testing machines available: Digital shear testing machine , Automatic shear testing machine, Large shear testing machine for 300x300 mm square samples, Bromhead ring shear apparatus.
Accessories to fit the machine in the electronic mode
Accessories to fit the machine in the analogical (mechanical) mode