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EPC Products Civil Engineering Testing Instruments Geotechnical Testing Rock & Soil Testing Laboratory Soil Testing Other Soil Test Unsaturated Soil Test System Back Pressured Shear Box (GDSBPS)
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Back Pressured Shear Box (GDSBPS)

Model：GDSBPS

Use：The Back Pressure Shearbox (BPS) has the ability to perform direct shear tests with precise back pressure control, for the recreation and measurement of realistic slope failures.

Standard：GBT 50123-2019

GDS BACK PRESSURED SHEAR BOX

Product Code : GDSBPS

The Back Pressure Shearbox (BPS) has the ability to perform direct shear tests with precise back pressure control, for the recreation and measurement of realistic slope failures.

 The BPS range 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.
 

Key features Benefits to the user
Internal loadcell: Internal loadcell for shear and optionally normal force for load measurements as close to the sample as possible for greater accuracy.
Optional low-cost version: Low-cost version available which uses hanging weights for axial load.
Rigid aluminium cell body: To reduce system compliance.
Unsaturated GDSBPS: The unsaturated GDSBPS is based on a standard, saturated device but modified to allow the measurement and control of matric suction (the difference between the pore air and water pressures).
Real-world situations to be modelled in the laboratory: All versions allow the pore pressures within the sample to be controlled. The control of pore pressure during direct shear testing allows real-world situations to be modelled in the laboratory.

Dimensions

L= 875mm x W = 350mm

Displacement Accuracy

<0.1% FSO

Displacement Resolution

axial = +/- 15mm, shear = +/- 25mm

Power

240V or 110V 50/60Hz single phase

Resolution of Measurement and Control

16 bit (± 25mm = ± 0.7μm(shear), ±10mm = ±0.3μm (axial)

Sample Sizes

75mm x 75mm (alternative sizes available on request)


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