There are two types of non-woven fabrics: staple fiber needle punch type and spunbond type.
There are two types of staple fiber acupuncture type and spunbond type. The most cost-effective material. At present, geotextile has become a key material in highway construction and reconstruction projects and has been used at home and abroad, among which non-woven geotextiles are the most used. Omit to extend the service life of roads, the functions of geotextiles include roadbed isolation and stabilization, roadbed reinforcement, stress absorption between roadbed and surface layer, and surface layer reinforcement. When repairing old roads, geotextiles can be laid on asphalt. The bottom of the pavement plays a role in prolonging the service life of the repaired road. The following introduces the role of non-woven geotextiles in the restoration of old pavement. High-grade road pavement structures that use non-woven fabrics to reduce road maintenance costs include asphalt pavements and cement concrete pavements. Asphalt road, also known as flexible road surface, has the advantages of damping vibration, adapting to roadbed deformation or uneven settlement, a quick repair, and opening to traffic after rolling.
Geotextiles are used in highways, railways, dams, ports, airports, water conservancy projects, slope protection, and environmental protection projects because of their good water permeability, filtration, and isolation properties. Many people think that geotextile is a kind of product, but the weight per unit area is different or the production standard is different. In fact, geotextiles have strict classifications, and different classifications are used in different engineering fields. speaking, geotextiles have the following categories: short-filament needle-punched non-woven geotextiles, filament spunbond needle-punched non-woven geotextiles, polypropylene high-strength geotextiles, tire-based fabrics, polypropylene spunbond needle-punched geotextiles, hot-rolled geotextiles Non-woven geotextiles, singeing geotextiles, the filament is woven geotextiles, plastic tape woven/grass-proof geotextiles, etc. Colors are generally white, gray, black, and green, special colors need to be customized
1. It is used to enhance the pavement: that is, whether it is an asphalt pavement or a concrete pavement, a flexible pavement, or a hard pavement, it has a reinforcing effect. Compared with the traditional pavement, it not only consumes less capital but also delays the generation of ground cracks. , the corresponding service life is long.
2. Waterproof and thermal insulation: There are many specifications for geotextiles. For geotextiles with relative thickness, a layer of interlayer will be formed after bonding with the viscous oil layer of the asphalt pavement, thereby protecting the foundation.
3. Moisturizing: When the road is repaired, the ground should be moisturized, because the hardening of the cement cannot be separated from the water. If moisturizing is not done, it will affect the strength of the cement and thus affect the service life of the road. The geotextile can have a good moisturizing effect on the road.
Why use geotextiles in road maintenance?
1. Increase the friction force: The friction coefficient of the geotextile is large. During construction, on the one hand, it prevents the vehicle from slipping, and so, it also prevents the geotextile from being rolled up by the vehicle and damaging the road surface.
2. Better quality: The so-called pavement maintenance cloth in the past is not only bad in material but also not easy to use. A waste of manpower and money, which is not the case with geotextiles.
3. Simple construction and time-saving: geotextiles are light in quality and high in strength. As long as the construction team has good technology, construction does not need to waste too much time.
Wide application of filament geotextile engineering?
Filament geotextiles can be used in water conservancy projects, anti-filtration of dikes and slope protection, road barriers, anti-seepage, foundation barriers of roads, railways, airport runways, anti-filtration, drainage, soil slopes, and road reinforcement of retaining walls.
Drainage: Soft foundation treatment of port engineering, beach embankment, seaport pier breakwater reinforcement, and drainage.
Polyester filament geotextiles have been used in the field of infrastructure construction and are being used in a wide range of fields.
Filament geotextiles are used. The price of filament geotextiles is calculated on a per square gram basis. The strength of the filament geotextile that is also covered will not be damaged after a period of time, and the strength of the uncovered filament geotextile will be damaged after a period of time. The use of filament geotextiles is found in household landfills, waste disposal, roads, railways, dams, coastal beaches, and other projects. The use of filament geotextiles has a certain lifespan, so we need to go through some ways to prolong its useful life. In the storage process, the integrity of the label and the integrity of the data should be linked. Only by storing the filament geotextile in the correct way can we ensure that its use performance is not affected and there is no problem during use. Filament geotextiles are used in barrier construction projects, filtration construction projects, drainage construction projects, reinforcement construction projects, protection construction projects, etc. The tendrils of filament geotextiles are covered with opaque materials to prevent ultraviolet aging. Thus, after laying the filament geotextile, it should be covered with some rare earth, which will increase its service life. The filament geotextile rolls should be stacked in a flat place without water accumulation, the stacking height should not exceed the height of four rolls, and the identification sheet of the roll can be seen. So how should we store the filament geotextile? The filament geotextile roll should be protected from damage before it is installed and unfolded. The storage method of filament geotextile is as important as the way it is used, and I hope the masters will not ignore it. To prolong the service life of filament geotextiles, the exposure time of filament geotextiles in the sun should be shortened as much as possible, and the geotextiles should be covered with rock soil or deep water with a thickness of more than 30cm, and anti-aging agents should be added to the original materials. The filament geotextile with the anti-aging agent will only lose 25% of its strength if it is exposed to sunlight for a period of time. If there is a damaged filament geotextile, it should be repaired in time, so as not to affect the undamaged geotextile after being blown by the wind
Composite geotextile product features good physical and mechanical properties, strong tear resistance, good deformation adaptability, puncture resistance, aging resistance, UV resistance, oil and salt resistance, acid and alkali resistance, corrosion resistance, high-temperature resistance, resistance to Low temperature, good non-toxicity, long use time. It has good waterproof, drainage, anti-seepage, and moisture-proof effects, complete width and thickness specifications, low cost, and simple construction.
The importance of applying non-woven geotextiles
We all know that non-woven soil is used in asphalt pavement, cement concrete pavement, and roadbed reinforcement. It can be used for both hard and flexible pavement. Compared with traditional pavement, it can reduce the cost, prolong the service life and prevent road reflection cracks. , Non-woven geotextile is an essential material in road maintenance.
Besides, there are many other reasons for the application of non-woven geotextiles in road laying, such as suitable product thickness, ease of combination with asphalt pavement, combined with adhesive layer oil to form an isolation layer, which has the functions of waterproof and thermal insulation. Rough surface, not easy to slide. When laying, the surface is treated and the rough side is facing up, which increases the friction coefficient, increases the friction coefficient, increases the bonding force of the surface layer, prevents the wheel from being rolled up and damaged during construction, and at the same time can prevent vehicles and paver from rubbing on the cloth. All these advantages make non-woven geotextiles a good helper in road maintenance.
Non-woven geotextiles are used in many projects today, but the application of this material has not attracted everyone’s attention, and many projects have not used this type of material, which has also led to many problems. Non-woven geotextiles are used in highways, railways, water conservancy, electric power, soil and water conservation, environmental greening, and infrastructure construction. They have excellent filtration, isolation, reinforcement, and protection functions, as well as high tensile strength, good permeability, high-temperature resistance, and Freezing, aging resistance, corrosion resistance, and other advantages.
In many constructions, non-woven geotextiles are not used, resulting in major problems of dam collapse, breach, and piping. Without the use of geotextiles, the river water affected the sediment dams enclosed by the stones, causing mudslides and rock collapses. Using geotextiles, the river water cannot touch the sediment, and the impact is only the geotextiles with a lifespan of hundreds of years. The importance of geotextiles in engineering construction also stems from their tensile strength and deformation resistance. Of course, the geotextile will also deform under the condition of exceeding the bearing capacity.
The geotextile manufacturer analyzed for us from the project that the average stretch of the slab is limited, but at the anchoring end of the geotextile on the dam foundation and bank slope, due to the “fixture effect” caused by rigid anchoring and huge water pressure, the Under the load, if the interaction between the geotextile and the dam body is not considered, the geotextile will produce tensile deformation that it cannot bear. Also, the stiffness of the geotextile has a small effect on the structural displacement of the high earth-rock dam. Under the special area of the rigid anchorage end, attention should be paid to the elongation of the geotextile, and a reasonable anti-seepage structure method should be adopted to make the geotextile adapt to the local area as much as possible. Large deformation of the area. But, since the deformation of the geotextile is limited by the displacement of the dam body on both sides, the tensile force in the geotextile is also limited, which reduces the possibility of the geotextile being damaged by pulling.
Thus, when purchasing non-woven geotextiles, it is necessary to sell geotextiles of corresponding specifications according to the construction requirements.