Large Direct Shear Test Apparatus

The automated large direct shear apparatus has been designed and manufactured according to latest version of current testing standards (ASTM, ISO, EN and DIN) and manufactured by highest quality of mechanical and electronic parts. This excellent quality makes it unique to produce the best repeatable test results.

The device determines the internal friction of construction materials e.g. soils, aggregates, gravels, geomembranes, geotextiles, GCL (Geosynthetic clay liner), recycling rubble Brick rubble, Colliery spoils, and industrial slag. The interface friction parameters between different construction material could be also determined by the device e.g. geotextile /soil, geotextile / concrete, asphalt/concrete, geogrid/soil and etc.

This floor mounted direct shear device is an automated apparatus to test large samples of 300x300mm or 500x500mm and 1000x1000mm sizes. It has variety range of axial and shear loaded up to 250kN and even larger loads for 1000x1000mm sample size.

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High stiffness robust design
Axial and shear load up to 250kN
Removable shear box made of stainless steel for testing high corrosive materials
Cylindrical or square sample shapes up to 1000mm
Stainless steel water receiver for sample saturation
Free floating upper shear box or stepless adjustment of the shear gap from 0-35mm
Residual shear tests
Creep Tests Module(optional)
Cylindrical or square sample shape
Front operational control panel with membrane keypad for easy test set up
Safety functions to prevent overload and overtravel
Closed loop controlled normal and shear stress
Real-time data and graph display
Ethernet Port for fast data transferring to PC
High quality industrial controller with displayer and membrane keys or Touch panel and graphic display for monitoring of measured values and test procedures
Manual control or by software/PC
Compatible to LABVIEW©
Flexible controlling software for nearly unlimited test procedures of all test options
Different upgrading options are available on request i.e. for geotextile applications

Load type	Electromechanical	Electromechanical
Normal force	60 kN / 100 kN / 125 kN	180 kN / 250 kN
Shear force	60 kN / 100 kN / 125 kN	180 kN / 250 kN
Speed range	0.00001- 60 mm/min	0.00001- 60 mm/min
Accuracy class	0.1%	0.1%
Resolution	0.00001 kN	0.00001 kN
Vertical displacement	50 mm	50mm
Shear displacement	100 mm	100mm
Resolution	0.001mm	0.001mm
Computer Interface	Ethernet	Ethernet
sample size	300x300mm	500x500mm

Bender Element Test Package
Extension package for Geotextile tests
Extension package for Pull out test
Temperature control package for low and high temperatures
Shear box inserts for smaller sample size/s

GEOsys is designed for closed-loop controlled static & Dynamic tests for all test applications in material testing, such as stress-controlled, strain-controlled, any kind of waveforms like sine, rectangle, triangle, and predefined waves.

It is controlling and data acquisition software and also has different modules to run tests according to ASTM or other standard methods. Depends on the requirement of the customer one or several modules would be delivered with main software, such as: