Main classification and industry selection of geotextiles

2019-06-04 11:56 Source:未知 Writer: Steven
    Geotextile refers to plastic film (primarily polyvinyl chloride and polyethylene, they are a kind of polymer chemical flexible data, small specific gravity, strong extension, customary deformation can be high, corrosion resistance, low temperature resistance, antifreeze function Good) The anti-seepage material with anti-seepage substrate and geotextile can effectively retain the lost sand, drain the remaining liquid and gas in the soil structure, and enhance the stability of the building structure. Improve soil quality.
    Geotextile cloth is also a kind of short-fiber chemical data, which has high tensile strength and elongation. When combined, it not only increases the tensile strength and puncture resistance of plastic film, but also because of non-woven fabric. The appearance is rough, which increases the friction coefficient of the touch surface, which is beneficial to the stability of the waterproof geotextile. Together, they have good corrosion resistance to bacteria and chemicals, and are not afraid of acid, alkali and salt corrosion.
    Main categories: staple fiber needled geotextile, filament geotextile. The primary role is outstanding water permeability, filtration, barrier function, and convenient construction. From the perspective of water permeability, the resurgence rate of vinylon and nylon is higher than that of other chemical fibers. Under the same conditions, there is more water permeability. Although polypropylene itself does not absorb water, it has a wicking effect, so the water permeability is outstanding. In fact, an important feature of polypropylene as a geotextile is its good water permeability, which makes it particularly suitable for road and railway subgrades.
    Based on some of the above comparisons and practical application, the following suggestions can be made: Due to the high strength and high modulus of the woven fabric, it is more suitable for the reinforcement and strengthening function. Therefore, woven fabrics are generally available for separation, reinforcement, and handling of corrosive applications. Since the nonwoven fabric has a large crack elongation, the nonwoven fabric is suitable for the function of tension balance and stress relaxation.
    Nonwovens can be used in workplaces where unevenness and even gravel are common. And even if the part is broken, if the part is pierced by the sharp stone, the surrounding structure will not be damaged. For example, in the simple road laying, the foundation is easily deformed, which requires the geotextile to accept a large deformation without breaking, and it is obvious that a non-woven geotextile should be used here. The non-woven geotextile has the characteristics of loose and porous, and is suitable for exerting hydraulic action (drainage, filtration, sieve filtration). The filter material that has obtained the best effect so far is a short-fiber nonwoven fabric, so most of the non-woven fabrics are used for filtration and drainage.
    Of course, this should also depend on the environment in which the geotextile is used. When filtering fine sand, mud, clay and other materials with a particle size of less than 0.05m, non-woven fabrics should be used, and the soil particle size such as sand data is better. For large occasions, it is more advantageous to use woven fabrics; geotextiles generally use woven fabrics because of the high strength required at the moment. For example, geotextiles for berms are generally made of woven fabrics, which are forcibly loaded with plaster and concrete and then laid on the slope surface instead of concrete model frames. The cost of non-woven geotextiles is low. From an economic point of view, Try to use as much as possible.

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