How to Choose A Good Permeable Geotextile?
Geotextile, also known as geofabric, is usually a water-permeable geosynthetic material made of synthetic fibers by needle punching or weaving processing way. Geotextile belongs one of new geosynthetics materials. The finished permeable geotextile product is cloth-like, usually with a width of 1-6 meters and a length of 50-200 meters. Geotextiles are divided into woven geotextiles and non-woven geotextiles.
Permeable Geotextile characteristics
1. High strength. Due to the use of plastic fibers, it can maintain sufficient strength and elongation in dry and wet conditions.
2. Corrosion resistance, long-term corrosion resistance in soil and water with different pH.
3, Good water permeability with fine openings between fibers.
4. Good biological resistance.
5. Easy installation because permeable geotextile is light and soft, which makes it convenient to transport, lay and install.
6. Wide specification range: width up to 6 meters, mass per unit area: 100-1000g /m2
Geotextile Application
Separation
Permeable geotextile is used to separate construction engineering materials with different physical properties, so that two or more materials are not be lost or intermixed. Thus, the overall structure and function of each material are maintained, which of loading capacity is strengthened.
Filtration
When the passage of liquid flows from the fine soil layer into the coarse soil layer, the good air permeability and liquid permeability of the permeable geotextile (usually is nonwoven geotextile) are used to pass the liquid flow and effectively prevent the loss of soil particles, fine sand, small stones, and so forth to keep soil and liquid engineering structure stable.
Drainage
Permeable geotextile has good water drainage property. It can form drainage passages inside the soil and discharge excess liquid and gas in the soil structure.
Reinforcement
Permeable geotextile is used to enhance the strength and anti-deformation ability of the soil body, to enhance the stability of construction structure by improving soil performance.
Protection
When water flow scours soil, permeable geotextile effectively diffuses, transfers or decomposes the concentrated stress to protect the soil from being damaged by external forces from water flow.
Puncture-resistance
Permeable geotextile can be composited with geomembrane to form a composite waterproof and anti-seepage material, which plays the role of puncture prevention.
Main Geotextile Types
1.Non-woven geotextile
The main raw material is polyester or polypropylene fiber. And in construction field, needle punching nonwoven geotextile is most widely used because it has five primary applications (separation, filtration, drainage, reinforcement and erosion control) which are commonly designed and required in the civil engineering structures of construction industry.
2.Woven geotextile
Woven geotextiles are obtained by polymer fibers, then spun into threads, and weaving on a loom to form a cloth with a regular organization. Because of their interlaced structure, they usually have higher strength than same material and density nonwoven geotextiles. But in the other aspect, they usually have lower properties in filtration and drainage of nonwoven geotextiles.
Pet Woven Geotextile
3.Geotextile Composites
① Needle-punched non-woven permeable geotextile composited with PE film Ordinary specification is one nonwoven geotextile with one film and two nonwoven geotextiles and one film. The main purpose of using this geotextile composite material is to prevent Infiltration, to enhance its anti-shear property and to improve the plane drainage performance between this liner and its overlying & underlying materials in the same time. They can be applied in railway, highway, tunnel, subway, airport, dams, reservoirs and other civil engineering projects.
② Non-woven and woven composite geotextiles
Needle punched non-woven geotextile and woven geotextile can be composited to one compound material. This compound material can provide excellent reinforcement and permeability coefficient property.
Polyester Nonwoven and Woven Composite Geotextiles
③ Geotextile and geogrid composites
Permeable nonwoven needle punched geotextile and woven geogrid can be compounded to make a composite geosynthetic material which provides both reinforcement and permeability applications.
Geotextile and Geogrid Composites
Shanghai Yingfan Environmental Engineering Co., Ltd., is specialized in R&D, manufacture, sales and installation services of geotextiles and other geosynthetic lining products. Certified by ISO 9001, 14001, OHSAS18001, our company provides top quality products and professional installation service.
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