Automated Geosynthetic Interface Friction Testing Equipment

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Whats/App: +86 156 1874 6768

Web: standard-groups.com

Standard

Direct shear test:

IS0 12957.1:Geosynthetics - Determination of friction characteristics - Part 1: Direct shear test

GB/T 17635.1-1998:Geotextiles and geotextile-related products - Determination of friction characteristics - Part 1: Direct shear test

JTG E50 T1129:Test method for direct shear friction of geosynthetics in highway engineering (corresponding to JTG E50 T1129)

SL/T 235:Specification for test and measurement of geosynthetics

ASTMD 5321:Standard Test Method for Determining the Coefficient of Soil and Geosynthetic or Geosynthetic and Geosynthetic Friction by the Direct Shear Method

Pull test :

JTG E50 T1130:Test method for pull-out resistance of geosynthetics in highway engineering (corresponding to JTG E50 T1130)

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

Accessoriess

Shear box

Vertical loading device

Horizontal loading device

Tensile and compressive force sensor

Displacement sensor, etc.

Test Procedures

Ensure the test requirements are met; then, the geosynthetic material sample is placed flat on the soil sample or embedded in the soil in the prescribed manner, and its position is secured.

Set the test parameters: According to the test standards and requirements, set parameters such as direct shear or pull-out speed, vertical pressure, and data acquisition frequency in the control system.

Conduct the test: Start the testing machine. The loading system applies vertical pressure and horizontal force according to the set parameters. Sensors collect force and displacement data in real time. The control system processes and displays the data. During the test, observe the test phenomena, such as the deformation and failure of the sample.

Test completion and data processing: When the test termination conditions are met, stop the test and turn off the power; export the test data from the control system, organize and analyze the data according to relevant standard methods, and calculate the performance indicators of the geosynthetic material, such as direct shear friction coefficient, shear strength, and pull-out resistance.

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