Back Pressure Cut-off Box
Product Code: GDSBPS
Categories:
ASTM D-3080 CEN ISO/TS 17892-10 JGS 0560 JGS0561
The Back Pressure Shear Box (BPS) features direct shear testing with precise back pressure control for reproducing and measuring realistic shear errors.
The BPS series includes a saturated version (control of pore water pressure), an unsaturated version (control of both pore water and pore air pressure), and a dynamic version.
| Features and Advantages | |
|---|---|
| Internal load cell: | Internal load cell for shear and optionally normal force for load measurements as close to the sample as possible for higher accuracy. |
| Optional low-cost version: | A low-cost version using hanging weights for axial load is available. |
| Rigid aluminum cell body: | Reduces system compatibility issues. |
| Unsaturated GDSBPS: | The Unsaturated GDSBPS standard is based on a saturated device but has been modified to allow measurement and control of matrix suction (difference between pore air and water pressures). |
| Real-world situations to be modeled in the laboratory: | All versions allow control of pore pressures in the sample. Control of pore pressure during direct shear testing allows real-world situations to be modeled in the laboratory. |
| Technical Specifications | |
| Dimensions | L = 875 mm x W = 350 mm |
| Displacement Accuracy | <% 0.1 FSO |
| Displacement Resolution | axial = +/- 15mm, shear = +/- 25mm |
| Power | 240V or 110V 50/60Hz single phase |
| Measurement and Control Resolution | 16 bit (± 25mm = ± 0.7pm (shear), ± 10mm = ± 0.3pm (axial) |
| Sample Sizes | 75mm x 75mm (alternative sizes are available upon request) |
