Filament geotextile application

Filament geotextile is a high-performance geosynthetic material widely used in civil engineering and environmental protection engineering. The following is a detailed introduction to filament geotextile:

1. Definition and production process

Definition: Filament geotextile is a fabric made of polymer chips (such as polyester chips or polypropylene particles) through spinning, laying nets, needle punching reinforcement and other processes. It does not contain chemical additives and is not heat-treated. It is an environmentally friendly building material.

Production process:
Raw material selection: Use high-quality polyester chips or polypropylene particles.

Mixed molding: Mix the raw materials and additives at high temperature and form filament bundles through the spinneret.

Molding treatment: Place the filament bundle on the oriented mesh belt, and after four-roll spiral pressure, cooling and stretching treatment, form the finished filament geotextile.

Subsequent processing: The finished product can be coated, composited and processed to meet specific needs.

2. Main characteristics
High strength: Under the same gram weight specifications, the tensile strength of filament geotextile in all directions is higher than that of other needle-punched non-woven fabrics.
High temperature resistance: It can withstand temperatures up to 230°C, maintaining structural integrity and original physical properties.
Good permeability: It has good plane drainage and vertical permeability, which can be maintained even after many years.
Creep resistance: Compared with other geotextiles, filament geotextiles have better creep resistance and better long-term effectiveness.
Corrosion resistance: It can resist the erosion of common chemicals in the soil and the corrosion of gasoline, diesel, etc.
Ductility: Under a certain stress, it has good elongation, enabling it to adapt to the unevenness of irregular base surfaces.

3. Application areas
Water conservancy projects: used for anti-seepage, embankment reinforcement, river management, reservoir construction, etc.
Road engineering: used for road reinforcement, waterproofing, anti-corrosion, isolation layer, etc.
Railway engineering: used for railway reinforcement, isolation, anti-seepage, anti-corrosion, etc.
Environmental engineering: used for soil stabilization, landfill coverage, yard coverage, etc.
Mining engineering: used for mine waste treatment, slope reinforcement, anti-seepage, etc.
Governance project: used for river regulation, soil erosion control, windbreak and sand fixation, etc.

4. Technical parameters and standards
The technical parameters of filament geotextile include unit area mass deviation, thickness, width deviation, breaking strength, breaking elongation, CBR bursting strength, equivalent aperture, vertical permeability coefficient, etc. These parameters are in line with the national standard GB/T 17639-2023 (or the previous version GB/T 17639-1998).

5. Construction and precautions
Construction: The construction of filament geotextile should follow relevant specifications and requirements to ensure the quality of construction. During the construction process, care should be taken to protect the geotextile from damage and keep it clean and dry.
Precautions:
Avoid construction under extreme weather conditions, such as high temperature, strong wind, rain and snow, etc.
The geotextile should be inspected before construction to ensure that it is not damaged or contaminated.
When laying the geotextile, ensure that it is flat, wrinkle-free, and maintain an appropriate overlap length.
After the construction is completed, the geotextile should be maintained and maintained as necessary to extend its service life.

In summary, filament geotextile is widely used in civil engineering and environmental protection engineering due to its high strength, high temperature resistance, good permeability, creep resistance, corrosion resistance and ductility. During the construction process, relevant specifications and requirements should be followed to ensure the construction quality, and attention should be paid to the maintenance and maintenance of the geotextile.

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