ISO 12957.1, ASTM D5321 Geosynthetic direct shear pull-out friction testing machine, direct shear tester ASTM D6706. 

UT4064 Geosynthetic direct shear pull-out friction testing machine, is used to execute the geotechnical direct shear test is a mechanical test used to study the shear strength and deformation characteristics of soil or geosynthetics. 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.
Test principle
The principle of the direct shear test is to place the sample in a shear test frame, apply two parallel horizontal forces above and below, so that the sample undergoes shear failure in a direction perpendicular to the horizontal plane, and calculate the shear strength of the sample based on the stress-strain curve obtained in the experiment.

Conform with standard:

ISO 12957.1 Geosynthetics — Determination of friction characteristics

ASTM D5321 Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear

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

JTG E50 T1129 Direct shear friction characteristics test

SL/T 235 Code for Test and Measurement of Geosynthetics

ASTM D6706 Standard Test Method for Measuring Geosynthetic Pullout Resistance in Soil

JTG E50 T1130 Pull-out friction test

1. Stress range: 50KN

2. Sensor accuracy: ± 0.02% F.S

3. Highway standard shear box size: 300 × 300 × 150mm

Drawing test box size: 250 × 200 × 200mm

Water standard cutting box size: 80 × 80mm (upper and lower boxes)

Drawing test box size: 400 × 250 × 250mm

Standard road standard and water conservancy standard optional

4. Displacement stroke: 200mm

5. Displacement resolution: 0.001mm

6. Speed range: 0.01-50mm/min

7. Shear force accuracy: ± 0.5%

8. Normal force range: 0-200KPa

9. Normal force accuracy: 1%

10. Normal force testing units: Mpa, Kpa, kgf/mm ², N/mm ², N/cm ², and other units are available for selection

11. Normal force adjustment method: servo system control, high accuracy, stable pressurization

12. Display: Straight shear force, tensile force, normal force are displayed on the same screen

13. Computer processing of reports, graphics, screen displays, or printed outputs

14. Operating software system function: The instrument can be connected to a PC to record the entire test process and display real-time data such as curve graphs, shear forces, tensile forces, and curve graphs.

15. This machine is versatile, capable of conducting both direct shear friction tests and tensile friction tests on geotechnical materials

16. Power supply voltage: 220V

17. Dimensions: 1300 * 600 * 1700mm

18. Weight: 450KG

ISO 12957.1 Geosynthetics — Determination of friction characteristics

ASTM D5321 Standard Test Method for Determining the Shear Strength of Soil-Geosynthetic and Geosynthetic-Geosynthetic Interfaces by Direct Shear

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

JTG E50 T1129 Direct shear friction characteristics test

SL/T 235 Code for Test and Measurement of Geosynthetics

ASTM D6706 Standard Test Method for Measuring Geosynthetic Pullout Resistance in Soil

JTG E50 T1130 Pull-out friction test