Direct Shear Test Apparatus DW1280
Direct Shear Test Apparatus which also named Direct Shear and Pullout Test Apparatus ,Large Scale Shearing Box or Direct Shear/Pullout Test Apparatus.FYI- best Direct Shear Test Apparatus Supplier of china with affordable price. The friction characteristics of sand soil/Geotextile interface were measured by contact surface of standard sand/Geotextile. This instrument is suitable for all geotextiles and their related products. The instrument adopts high precision servo motor.
Direct Shear Test Apparatus DW1280
Direct Shear Test Apparatus is used to determine the shear resistance and the pullout resistance of a geosynthetic against soil, a geosynthetic against another geosynthetic, Lay the sample flat on the rigid horizontal base in the lower part of the shearing box, and the front end clamps in front of the shear zone. The sample is glued together with the base. After bonding, the sample should be flat, without folding and folding. There is no relative slip between the sample and the base in the test.
Follows are Direct Shear Test Instrument 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.
Application
Application of Direct Shear Test Apparatus
Direct Shear Test Apparatus is used to determine the shear resistance and the pullout resistance of a geosynthetic against soil, a geosynthetic against another geosynthetic, or a Geosynthetic clay liner against an adjacent material, by the directly shear test and by the pullout test separately. The test results obtained are used in the design of structures that employ geosynthetics, also used for quality control during construction of these structures. It is suitable for geotextiles, geomembranes, geonets and geogrids, etc.
Direct shear box test apparatus complies with ISO 12957.1, ASTM D5321,GB/T 17635.1, JTG E50 T1129, ASTM D6706 , SL/T 235 , JTG E50 T1130 etc international and retailer standards.
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Standard
Standard of Direct Shear Test Apparatus
| ISO 12957.1 | ASTM D5321 | GB/T 17635.1 | JTG E50 T1129 |
|---|---|---|---|
| SL/T 235 | ASTM D6706 | JTG E50 T1130 |
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Key specification
Key specification of Direct Shear Test Apparatus
| Sample box size in direct shear test | 300*300*200mm, can be customized |
|---|---|
| Moving box size in direct shear test | 300*300*200mm, can be customized |
| Box size in pullout test | 300*300*340mm, can be customized |
| Force range | 0~30KN |
| Force accuracy | ≤±0.05％F.S |
| Normal stress | 400kPa, can be customized |
| Method to load normal stress | Hydraulic pressure, adjust manually |
| Precision of adjusting normal stress | ±2% |
| Return speed | 50mm/min |
| Displacement range | 0~50mm, 0~300mm |
| Power supply to servo motor | AC220V, 50Hz |
| Power supply to hydraulic pressure system | AC220V, 50Hz |
| Dimension | 1500*900*1800mm (L*W*H) |
| Weight | 1000kg |
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