Standard specifications
Key parameters and quick judgement tables
| Function | Priority indicators | Field testing |
|---|---|---|
| Filtering | Efficient perforation, permittivity | Soil-type distribution and textile-type correspondence |
| Isolated | Stretching, stretching, building activity | Filler Particle and Equipment |
| Protecting | The weight, thickness, CBR puncture strength | Height of membrane protection and coating |
| Project additional drainage functions | Other design specifications for surface water conduction | Clear test methods, methods for pressure and hydraulic gradients |
Standard specifications
Project judgments and procurement conclusions
GB/T 17639-2023 has replaced the 2008 version. When the continuous-filament needle-punched nonwoven geotextile, the mass per unit area can only be used for specification identification, but also for the determination of items such as break strength, stretch, CBR puncture strength, tear, effective perforation and permittivity.
Standard specifications
Acceptance points and common risks
- The 2008 version of the templateThis may lead to inconsistencies in the version of the document being detected and determined.
- Instead of thickness, strengthThe thickness of the fabric does not necessarily have to be higher than the crest or resistance.
- Samples without batchesThe results of the lab were not consistent with actual material.
Standard specifications
Steps to landing
- Standard year of verification
The procurement, reporting and labelling should be consistent.
- Randomly picked up
Avoid the end of the scroll and take a sample of the seal at the designated location.
- The same way
The data on different holding, direction and humidity conditions cannot be confused.
- Functional judgement
The key indicators for the project are not just the weighting, but the use.
Technical basis