Direct Shear Test
The GCTS Direct Shear Systems for Rocks are simple and inexpensive devices capable of performing direct shear tests on a wide variety of rock specimens. These systems are ideal for performing direct shear tests, as all testing procedures can be automated through the use of our advanced software and all test data is automatically analyzed at the end of the test.
The GCTS Direct Shear Systems for Rocks feature:
ASTM D4554 Standard Test Method for In Situ Determination of Direct Shear Strength of Rock Discontinuities
ASTM D5607 Standard Test Method for Performing Laboratory Direct Shear Strength Tests of Rock Specimens Under Constant Normal Force
The Direct Shear System for Rocks is an inexpensive apparatus used to test many configurations of rock specimens. Prisms, cubes, fragments, and cylindrical specimens can all be used in the test to determine the shear strength of the rock.
This system contains closed-loop, servo-controlled, electro-hydraulic shear and normal load actuators which, in conjunction with the advanced GCTS software, allow for automatic performance of a Direct Shear Test. The software uses inputs from up to four normal deformation sensors and the normal load sensor to automatically calculate the average normal deformation of the specimen. This allows for the system to automatically perform either a constant normal stress or a constant normal stiffness test.
Specimen are created inside removable specimen rings and placed inside the shear box, which allows multiple specimens to be prepared simultaneously, increasing laboratory productivity.
Systems are available for larger load capacities and larger diameter specimens. A more economical, manual pump system is also available as an alternative.
Please contact GCTS for full specifications.