What is Geotextile? How is Geotextile Used?
·✓ Application areas of geotextiles
·✓ Simple non-woven geotextile
·✓ Non-woven thermal fixing (calendering) geotextile
·✓ Non-woven hot clay work cloth
·✓ Weaving Geotextile
·✓ Knitted geotextile
·✓ The field of application of geotextiles depends on the density
·✓ Geotextile application
Geotextile was developed for road construction.
But now it’s the foundation, the use of roof construction, creating drainage and filtration, reinforcement and separation of different types of layers, as well as garden landscape design and landscaping.
Geotextiles are synthetic fibers (polypropylene, polyester, polyester, or polyamide) that can pass water while retaining soil particles.
Geotextiles are not afraid of cold or heat: the working temperature range is -60 to 110’C. The material is very durable (can withstand tensile forces of 100 to 600 N, depending on the density), does not undergo organic decomposition, and is very environmentally friendly, so it can be used as drainage, filtration, and reinforcement layer in buildings and landscapes.
The first and main field of geotextile application is road construction in the entire range from garden trails to highways.
The material does not allow gravel-sand base mixing, increasing its stability. In addition, the durable and rigid polymer mesh can more evenly distribute the local load on the lid.
Therefore, the thickness of the backfill can be optimized, thereby reducing the amount of excavation, which is known to be very expensive.
Finally, to accelerate the removal of water, the geotechnical prevents separate fractions (sand, cement, etc.) from the road surface, preventing sudden drops, hollows, etc. The leaching of roads lined with geotextiles served an average of six times without repairs is more similar than without it. The economic effect is obvious.
Geotextiles are very useful when constructing ponds, swimming pools, and other hydraulic structures that require reliable drainage systems.
It can even retain small impurities (while passing water), prevent plant growth, and protect the insulating water film from mechanical damage.
Another application area of the material is anti-roofing (canvas is placed on the insulation layer to prevent particles from the loading layer from penetrating into it) and green roofs (the geotextile is placed above the waterproof layer but between the humus and the drainage layer to prevent them mix). When used as asphalt, it is used as a reinforcing substrate.
Geotextiles can protect the floor from contamination by liquid concrete. In addition, in this case, the polymer mesh acts as a reinforcing layer, significantly reducing the risk of shrinkage.
But this is not all. Geotextiles are used to drain the cellar. They cover the bottom of the sedimentation tank and strengthen the embankment of the dam.
With its help, it can prevent the roots of trees from growing towards the path and foundation in the garden. In short, the range of this material is infinite. Now consider it in more detail.
Based on the manufacturing method, geotextile nonwovens, woven and knitted nonwovens can be simple, thermally fixed, and thermally bonded.
Simple Non-Woven Geotextile
Simple non-woven geotextile is made of synthetic fibers by needle punching. Needle hooks are wrapped around the raw material to form a kind of felt. Also, the yarns do not adhere closely to each other, so the blade has a certain degree of elasticity. In simple terms, this geotextile can be stretched, so it is reasonable to use it anywhere large loads do not fall on the cover, such as at the bottom of a garden path.
Non-woven thermal fixing (calendering) geotextile is a needle-punched geotextile, which is thermally hardened by rolling on a roller and blowing with hot air. This geotextile is the thinnest among existing geotextiles, and it has sufficient strength.
Non-Woven Hot Clay Work Cloth
The technology of making non-woven thermal clay work cloth lies in the initial quality of melting (extrusion): a very thin raw material thread is melted and sprayed on the entire needle pierced surface. This ensures the uniform structure and elasticity of the net, its high filtration performance, and the ability to withstand significant loads.
The manufacturing technology can be seen in the name. In this type of geotextile, the fibers are rigidly connected to each other, which increases the tensile strength. Depending on the material of the threads and the way they are interlaced, the properties of the net can vary greatly. By changing the weaving pitch, you can achieve almost any size grid unit, and different thread weaving methods allow you to adjust the density of the fabric. Landscape architects need to weave geotextiles. Thanks to him, you can plant grass anywhere, organize the drainage of a small piece of soil or strengthen embankments. Geotextiles with interwoven seeds will help grow plants, even on the steepest slopes, they will be washed away by water or blown away by the wind.
Knitted geotextile, as can be clearly seen from the name, has a circular weave with threads. This determines its main disadvantage-a lower disconnection threshold. In short, in the case of mechanical damage, the canvas begins to dissolve and collapse more and more, which of course is a negative number. But there are also advantages-this geotextile is cheaper than others.
Geotextiles are 1-3 mm thick and are supplied in rolls: the length of the net varies from 100 to 350 m and the width from 1,6 to 6 m. The density can be from 80 to 600 g/m2. It is from this indicator that it firstly depends on which area can apply a specific material.
For example, geotextiles with a density of 150-200 g/m are recommended to be used as filters in drainage systems and track bases.
The density of the web (200-350 g/m2) is suitable for the protection of soil erosion, soil, and soil reinforcement, creating a separation of layers that access roads. The densest material (350-600 g/m2) private homeowners will most likely not need it-purchased on an industrial scale during highway construction and the construction of dams and other important hydraulic structures.
The main parameter that affects the quality of geotextiles is the raw materials used to produce geotextiles. Today, most experts believe that geotextiles made of virgin polypropylene (monofilament) are the best. This material always has a white color. The cloth made of pure polyester fiber, polyester fiber, and polyamide fiber is also very strong and durable. But for geotextiles made of textile waste, you need to be careful-it may contain perishable cotton or wool fibers. Such materials can be identified by “dirty” heterogeneous colors.
Currently, many companies produce geotextiles. It should be noted that nowadays, consumers prefer to buy 100% brand new materials.
And at the end of the theme are some style tips. During road construction, it is very important to prepare the foundation surface-level the soil and make the geotextile as flat as possible. Overlap the cloth or bed sheets by 30-50 cm, and place the canvas under the horizontal seams. These measures will avoid prejudice.
In order to avoid the damaging effects of ultraviolet rays that all polymers are afraid of, it is recommended to cover with geotextile immediately after installation. It is important to ensure that the material does not move, does not wrinkle, and certainly does not get cut or punctured. Blades that are accidentally damaged must be replaced.
100-150g/m2:The drainage system, garden paths, lawns, and decorative ponds
200-300g/m2:Sidewalks, large artificial ponds, and drainage channels
300-450g/m2:Parking lot and car road
400-500g/m2:Road through freight
350-600g/m2:Railways, highways, and runways of airports of local importance
1. Parking on the lake. 2. Sidewalks, garden paths. 3. Create an artificial reservoir in Villa 4. Protect plants from weeds. 5. Protect plants from drought. 6. Limit root growth. 7. Build a playground.
The Main Points of the Scheme of Spinning Geotextile in the Foundation Anti-seepage Project of the Landscape Wetland:
1. Spun geotextile has huge advantages in high-strength applications such as reinforcement, reinforcement, and erosion resistance. Because spun geotextile uses high-quality spun geotextile raw materials, the construction is simple.
2. The construction personnel must be able to handle various complex situations according to the construction conditions of the woven geotextile. The woven geotextile has the characteristics of a stable structure and high engineering parameter compliance rate, and the woven geotextile is resistant to most acid and alkali corrosion.
3. As a new type of material, woven geotextile has attracted the attention and attention of the engineering community. The backfill layer of the woven geotextile should be solid, and the woven geotextile has good elongation under certain stress. The construction stitching deformation joint is also There are weak links in waterproof measures of woven geotextiles.
4. The edge parts of the woven geotextile need to be processed according to the requirements of laps. The structure and original physical properties are still maintained at high temperatures, which solves the problem of material resistance that cannot be solved by the previous engineering. Spun geotextiles can be combined with other polymer membrane materials to reduce ultraviolet radiation. Spun geotextiles have good strength and ductility. With their large tensile strength and elongation, they can withstand water pressure and adapt to dam deformation and are resistant to corrosion. , Low-temperature resistance, good frost resistance.
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