ASTM D5397 UT4027 Geomembrane environmental stress cracking resistance testing machine ((Notched constant load tensile load stress tester) for geomembranes mainly simulates the stress and chemical medium conditions faced by geomembranes in actual use environments based on specific testing standards. It applies a certain stress to the geotextile sample while exposing it to a specific chemical environment, observing and recording the time required for the geotextile to crack. This process is based on the principle that the molecular structure of materials will gradually change under the combined action of stress and environmental factors, and cracks will occur when it reaches a certain level. By precisely controlling the experimental parameters, the durability of geomembranes in practical engineering can be accurately predicted. Geomembranes have a wide range of applications in various fields, such as water conservancy engineering, landfill sites, etc.,

Conform with standard:

GB/T 17643-2011 Geosynthetics Polyethylene Geomembrane Appendix D

CJ/T 234-2006 High density polyethylene geomembrane for landfill sites Appendix C

ASTM D5397-20 Standard Test Method for Evaluation of Stress Crack Resistance of Polyolefin Geomembranes Using Notched Constant Tensile Load Test.

NSF 54 : 1993 FLEXIBLE MEMBRANE LINERS

Test Principle:

Cut dumbbell shaped specimens on the geomembrane membrane, make a cut in the middle of the specimen, place the specimen with the cut in a high-temperature surfactant under constant tensile force, test and record the time of specimen fracture.

Feature:

1. The instrument is designed with generous appearance, complete functions and high degree of automation.

2. Adopt touch screen display, Chinese operation interface, menu prompt operation is simple and clear, and the recording time is accurate.

3. Six units are designed, each unit has 5 stations, and the test efficiency is high.

4. The six units can be tested separately, easy to operate, accurate and reliable, the system automatically replenishes water, double motor stirring, and the temperature in the bath is uniform and the fluctuation is small

5. The glass cover device between the specimen frame is conducive to preventing water vapor evaporation and facilitating the observation of the test state.

6. Automatically control the temperature of the medium and the height of the liquid level, automatically record the breaking time, and print the test data after the test is completed.

7. According to the standard, the test channel should be 20, and the machine should be 30.

1. Applicable geomembrane specification: 0.75-3mm

2. Number of units in each group: 5

3. Leverage and labor-saving factor: 3

4. Timing range: 1s—9999h59min59s

5. Timing accuracy: 1s

6. Number of sample channels: 30 (20, 30, 40, etc. can be ordered according to user needs)

7. Bath volume: 125L

8. Temperature control range: room temperature - 80°C

9. Temperature control accuracy: ±1°C

10. Specimen fixture shaft diameter: 6mm

11. Ambient temperature: 10°C--35°C

12. Heating power: 3KW

13. Power supply: 220V 4.5KW

14. Overall dimensions: 1.9×0.5×1.4 meters

15. Weight: 180kg

GB/T 17643-2011 Geosynthetics Polyethylene Geomembrane Appendix D

CJ/T 234-2006 High density polyethylene geomembrane for landfill sites Appendix C

ASTM D5397-20 Standard Test Method for Evaluation of Stress Crack Resistance of Polyolefin Geomembranes Using Notched Constant Tensile Load Test.

NSF 54 : 1993 FLEXIBLE MEMBRANE LINERS