Geosynthetic direct shear drawing friction tester 丨Geotextile Test Machine
The friction characteristics of the interface of sand/geotextile were determined by testing the contact surface of standard sand/geotextile. This instrument is suitable for all geotextiles and related products. The instrument adopts high-precision servo motor.
By testing the pull-out friction resistance of the geosynthetic material and the surrounding soil, the pull-out resistance characteristics of the geosynthetic material were determined. It is suitable for soil of various soil properties and states and various types of geotextiles, geomembranes, geotextiles and geogrids.
Specification:
For direct shear test, adopt detachable drive unit, which can be moved from one shear box to another, allowing the testing of one sample while another sample is being prepared in a separate box.
For pullout test, the box is removable of a constant rate controlled by the servo motor; it is as same as moving box in direct shear test.
The direct shear test machine consists of servo motor, load cell, control panel, transducer, readouts for the sensors, etc.
The drive system is mounted on a wheeled frame to allow for easy separation from the sample box.
The box has low friction linear bearings when moving.
Digital readout for each test and can be connected to PC for data analysis.
Meet the standard:
Direct shear test :IS0 12957.1.GB/T 17635.1-1998.JTG E50 T1129.SL/T 235. ASTMD5321.etc
Pull test :JTG E50 T1130.SL/T 235. etc.
Features:
Direct shear drawing test system is an integrated machine with two functions of direct cutting and drawing, as long as by changing a small amount of tooling fixtures, two test functions can be achieved:
Computer upper computer software controls the test process, direct shear and drawing interface friction integration into one, software autonomy is strong, can independently set the experimental conditions of mainstream standards at home and abroad, applicable to mainstream national standards, and can independently complete data processing, to achieve full data export, easy to study the relationship between shear stress and displacement of samples and time, is a comprehensive interface friction test system;
The horizontal loading device adopts servo electric cylinder to realize full digital speed closed-loop control, which has the advantages of stable speed, wide speed range and high positioning accuracy, and the stretching speed can be set arbitrarily.
The normal loading device is realized by manual hydraulic or automatic electric cylinder, which is convenient and reliable, and the pressure is stable. The pin connection technology can quickly and simply change the clamp required for testing;
It has a variety of hardware and software protection measures such as overload and over-travel to ensure the safe and reliable operation of the equipment.
Parameters:
The shear box 300 x300x200mm 600 x600x300mm600x600x300mm
Under the shear box 300 x300x200mm 800 x600x300mm800x600x300mm
The drawing box size is 300x300x340mm 600x400x500mm 600x400x500mm
Loading mode Servo cylinder loading hydraulic loading Hydraulic loading
Normal pressure 0-250kPa 50-300kpa(customizable)
Static load :50-400 kpa
Dynamic load :50-300kpa
Horizontal drive mode servo cylinder servo motor hydraulic drive
Maximum horizontal force 30kN 50kN 100kN
Horizontal load accuracy 0.50%
Straight shear drawing speed 0.1-10mm/min 0.1-10mm/min 0.3-10mm/min
Direct shear displacement 0-100mm
Drawing displacement 0-150mm
Displacement resolution is 0.01mm
Return speed 1-50mm/min
Power supply AC220V 50Hz
Overall dimensions 2400*700*2000mm 2900*850*3400mm 1500*900*1800mm
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