Performance Comparison and Application Analysis of Nonwoven Geotextiles
Abstract: For the four non-woven polyester nonwoven geotextile for sale commonly used in the world, the raw materials and processing methods are introduced, and their respective properties are compared. According to the role of non-woven wholesale filament nonwoven geotextile in engineering, suitable application fields of different nonwoven polypropylene nonwoven geotextile factory price are proposed. Taking some specific engineering applications as an example, the reasonable use of non-woven polypropylene nonwoven geotextile for sale is analyzed, and the development prospects of non-woven polyester nonwoven geotextile factory price prospect.
Keywords: non-woven high quality filament nonwoven geotextile, staple fiber, spunbond, acupuncture, application
Non-woven high quality polyester nonwoven geotextile is one of the main geosynthetic materials. It has good mechanical properties, hydraulic properties, and durability. It can filter, drain, isolate, reinforce and protect geomembrane. Soil engineering, water conservancy projects, and municipal construction have been widely used. In China, although the non-woven polypropylene nonwoven geotextile manufacturers started late, it developed very rapidly and occupied an important position in engineering materials. This paper mainly introduces the characteristics and applications of four kinds of non-woven polyester nonwoven geotextile for sale commonly used in the world.
1. Comparative analysis of nonwoven geotextiles
1.1 polyester non-woven filament nonwoven geotextile manufacturers and polypropylene non-woven high quality filament nonwoven geotextile
Nonwoven wholesale polypropylene nonwoven geotextile come from a wide range of raw materials, including polyester, polypropylene, nylon, vinyl on and some natural fibers. Among them, polyester and polypropylene are the most widely used raw materials due to their low price and good performance.
At present, polyester non-woven polyester nonwoven geotextile manufacturers are the most widely used wholesale filament nonwoven geotextile in engineering. Polyester non-woven polypropylene nonwoven geotextile manufacturers have high strength, high melting point, excellent toughness and creep properties, especially in the anti-ultraviolet and anti-aging properties. However, polyester non-woven high quality polypropylene nonwoven geotextile also has certain shortcomings, such as poor acid and alkali resistance (only weak acid, strong acid, weak alkali can decompose), heat shrinkage, poor dimensional stability, etc., which limits its engineering application. range.
Compared with polyester non-woven polypropylene nonwoven geotextile factory price, polypropylene non-woven polyester nonwoven geotextile for sale have higher strength, better acid and alkali resistance, wear resistance, corrosion resistance, mildew resistance, and better wicking effect. The density of polypropylene is 30% smaller than that of polyester. When the fixed weight of polypropylene non-woven polyester nonwoven geotextile factory price and polyester non-woven wholesale filament nonwoven geotextile is the same, polypropylene non-woven polypropylene nonwoven geotextile for sale has more fiber, and its drainage and flat drainage are better. Due to these characteristics, polypropylene non-woven wholesale polypropylene nonwoven geotextile has an irreplaceable position in polyester nonwoven polypropylene nonwoven geotextile manufacturers in underground acid-base environments and in harsh environments such as high temperatures. However, polypropylene’s UV resistance is poor, which limits the amount of polypropylene nonwoven polyester nonwoven geotextile manufacturers used in its application. At present, polypropylene non-woven filament nonwoven geotextile for sale are rarely used in engineering in China.
1.2 Short fiber needled nonwoven geotextile and spunbond needled nonwoven filament nonwoven geotextile manufacturers
According to different processing methods, non-woven wholesale filament nonwoven geotextile includes staple fiber acupuncture, spunbond acupuncture, thermal bonding or chemical bonding, among which staple fiber needle-punched nonwoven filament nonwoven geotextile for sale and spunbonded needle-punched nonwoven high quality polyester nonwoven geotextile. The largest amount and the most widely used. Short-staple needle-punched nonwoven wholesale polypropylene nonwoven geotextile, whether airlaid or carded, have a good three-dimensional structure, large thickness, fluffy structure, and high porosity. It is most suitable for filtration and drainage. Instead of sand and gravel in geotechnical engineering, it is used as a filter layer.
Spunbonded needle-punched nonwoven polyester nonwoven geotextile factory price excels in mechanical properties. Some domestic tests have shown that the breaking strength of the former is 1.5~ higher than that of the same material and short-fiber needle-punched nonwoven polypropylene nonwoven geotextile manufacturers of the same surface density. 1.9 times and some foreign data show a greater gap between the two; in other mechanical properties, such as tear strength, bursting strength, creep and friction properties, spunbonded needled nonwoven polypropylene nonwoven geotextile factory price is also better than staple fiber needle The thorn nonwoven high quality polypropylene nonwoven geotextile is more excellent. In addition, when spunbonded needle-punched nonwoven polyester nonwoven geotextile manufacturers are exposed to sunlight, the main damage is surface fibers, which greatly reduces the loss of performance.
Polyester staple fiber needle-punched nonwoven wholesale filament nonwoven geotextile, polyester spunbond needle-punched nonwoven filament nonwoven geotextile for sale, polypropylene staple fiber needle-punched nonwoven filament nonwoven geotextile factory price and polypropylene spunbonded needle-punched nonwoven wholesale polypropylene nonwoven geotextile are four kinds of non-woven geotechnical commonly used in the world. Cloth, refer to Q/CR549.5-2016 “Railway Engineering Geosynthetics Part 5 high quality filament nonwoven geotextile” to compare the mechanical properties of four kinds of nonwoven polypropylene nonwoven geotextile for sale.
Under the same areal density, the polypropylene-woven polyester nonwoven geotextile for sale of the same process and different raw materials have much higher breaking strength than the polyester non-woven high quality filament nonwoven geotextile; the spunbonded filament nonwoven geotextile manufacturers of the same raw materials and different processes are more fractured than the stapled-punched geotextiles. high strength. The same is true for the strong break. Since the fracture strength of the nonwoven polypropylene nonwoven geotextile manufacturers is positively correlated with the areal density, it can be inferred that the same process of the polypropylene nonwoven wholesale filament nonwoven geotextile has a lower areal density than the polyester nonwoven filament nonwoven geotextile for sale under the same breaking strength. Q/CR549.5—2016 “Geological Engineering Geosynthetics Part 5 filament nonwoven geotextile manufacturers” states that when the breaking strength of the nonwoven high quality polypropylene nonwoven geotextile is 40.0kN/m, the areal density of the polyester spunbonded needled nonwoven polypropylene nonwoven geotextile factory price shall be 800g/m2 and the surface density of polypropylene spunbonded needle-punched nonwoven polyester nonwoven geotextile manufacturers can reach 600g/m2.
Several properties of the four high quality filament nonwoven geotextile were sorted by merit.
Note: The circle number from small to large indicates that the performance is superior to poor, such as 1 represents the best performance.
The raw materials or processes of the four kinds of non-woven high quality polyester nonwoven geotextile are different. They have different main functions in different projects and different parts and should be selected according to the actual conditions of the specific project.
2. The function and selection of non-woven filament nonwoven geotextile factory price
2.1 Filtration
One of the main roles of nonwoven wholesale filament nonwoven geotextile in engineering applications is the filtration. Good water permeability and soil conservation make the non-woven polyester nonwoven geotextile factory price can be used as a filter layer instead of sand and gravel in the geotechnical engineering to avoid the loss of soil particles and the instability of the soil caused by excessive water pressure. The application scope of the non-woven wholesale polypropylene nonwoven geotextile filter layer includes landfill leachate collection system, landfill closure, tailings reservoir, reservoir dam body, retaining wall drainage, and transportation. In the application, the non-woven polypropylene nonwoven geotextile manufacturers are in direct contact with the liquid to be filtered, so the main consideration is to select the acidity and alkalinity and corrosiveness of the liquid to be filtered. Polypropylene staple fiber needle-punched polyester nonwoven geotextile for sale has good acid and alkali resistance, which is beneficial to the long-term effective operation of the project.
2.2 drainage effect
The non-woven polypropylene nonwoven geotextile for sale is a sheet-like fiber aggregate with a certain thickness, which has good water collecting performance and lateral drainage performance. It can be placed inside the soil to collect the moisture in the soil, and then the water along the high quality polypropylene nonwoven geotextile. The soil is discharged laterally. This property of non-woven wholesale filament nonwoven geotextile makes it possible to apply horizontal drainage underfill, vertical drainage and horizontal drainage of the earth-rock dam body and dam foundation, soil slope drainage to dissipate excess pore water pressure, soft soil foundation drainage, etc. In the project. When the non-woven polyester nonwoven geotextile manufacturers are mainly used for drainage, the choice of thick non-woven polypropylene nonwoven geotextile factory price can achieve better-expected goals, and the mechanical properties of the nonwoven filament nonwoven geotextile for sale are not high.
2.3 Protection of geomembrane
In the anti-seepage project, when the anti-seepage layer adopts HDPE (ie high-density polyethylene) geomembrane, according to the design requirements, a non-woven filament nonwoven geotextile manufacturers with a density of not less than 600g/m2 is laid on the HDPE geomembrane as a protective layer. Non-Woven high quality polyester nonwoven geotextile is also required to be used as a protective layer under the HDPE geomembrane. When the landfill is not covered, the non-woven wholesale polypropylene nonwoven geotextile can protect the HDPE geomembrane from the aging of ultraviolet rays; after landfill and landfill, the non-woven wholesale filament nonwoven geotextile can protect the HDPE geomembrane from the lower part under long-term load conditions. Damage to sharp objects and damage to friction caused by sudden uneven load bearing. The UV resistance of the nonwoven polypropylene nonwoven geotextile manufacturers itself is related to its thickness. Polyester spunbonded needle-punched nonwoven high quality polypropylene nonwoven geotextile has superior UV-blocking properties. Compared to polyester staple fiber-punched nonwoven polyester nonwoven geotextile manufacturers, the effect of UV on the former mainly occurs on the surface fibers.
2.4 isolation
In engineering design, two materials with different particle sizes are often encountered in contact with each other. In order to prevent the two materials with different particle sizes from interpenetrating under the action of water, the meaning of the design structure is lost, and the normal operation of the project is ensured, and a separation layer is placed between the two materials. The non-woven polypropylene nonwoven geotextile for sale has high strength, good water permeability and a certain thickness, which can meet the needs of engineering design. For example, in the CRTS III type slab ballastless track design independently developed in China, the polypropylene staple fiber non-woven polyester nonwoven geotextile for sale is disposed of as a separation layer between the trackbed board and the base, mainly to avoid the deformation of the upper structure of the bridge and transmit the force to the trackbed board. It has warpage and deformation and has certain insulation and vibration isolation effects.
2.5 reinforcement
Generally, non-woven polyester nonwoven geotextile factory price, such as reinforced earth structures and reinforced cushions in soft foundation treatment, are used in less demanding reinforcement projects. Reinforcement is to improve the mechanical properties of the soil by using the tensile properties of the nonwoven filament nonwoven geotextile for sale and to limit the displacement of the soil during long-term use. This has higher requirements on the mechanical properties of the nonwoven high quality polyester nonwoven geotextile, and the polypropylene non-woven high quality filament nonwoven geotextile performs better in this respect.
The selection of suitable non-woven wholesale polypropylene nonwoven geotextile in geotechnical engineering design requires comprehensive judgment from two aspects: one is the role and purpose of the non-woven polypropylene nonwoven geotextile manufacturers; the other is the engineering situation. When it is mainly used for filtration and the liquid to be filtered is close to neutral, a polyester needled nonwoven filament nonwoven geotextile for sale can be selected. When not only the filtration effect, but also certain isolation and reinforcement, and the liquid to be filtered is non-neutral, the polypropylene non-woven polypropylene nonwoven geotextile factory price with high strength and good acid and alkali resistance should be selected. When a variety of non-woven polypropylene nonwoven geotextile for sale are available, the most suitable non-woven polyester nonwoven geotextile manufacturers can be selected based on experience and price.
3. Application examples
3.1 Dali Dashadi tailings pond expansion project
The location of the tailings reservoir of Dali Dasha is a hilly area with a large degree of undulation on the ground. The soil is mainly composed of fine-grained soil, sand, and stones, with a storage capacity of about 17 million m2, which has been used for 13 years. The project uses a composite impervious system consisting of a variety of geosynthetic materials, of which the role of nonwoven polyester nonwoven geotextile factory price is critical. The geosynthetic materials used in the anti-seepage system of the Dali Dawei tailings reservoir from the bottom to the top and the effects of each layer are shown in Figure 1.
In the anti-seepage system shown in Fig. 1, there are three layers of non-woven polyester nonwoven geotextile for sale from top to bottom. The first layer is located above the gravel leachate drainage layer (thickness 30cm), and the polyester staple fiber needle-punched nonwoven polypropylene nonwoven geotextile factory price (area density 200g/m2) is mainly used for filtration and isolation. The leachate is filtered and guided by gravel. The leachate drainage layer is discharged from the tailings pond. The second layer is a polyester spunbonded needle-punched nonwoven wholesale polypropylene nonwoven geotextile (area density 600g/m2), which is located between the gravel leachate drainage layer and the HDPE geomembrane (thickness 1.5mm) as the upper protective layer of the HDPE geomembrane. The HDPE geomembrane is protected from the aging effect of ultraviolet rays during the laying process, and the HDPE geomembrane is effectively protected from gravel damage under high load conditions for a long time during use. The third layer is a polyester spunbonded needled nonwoven polyester nonwoven geotextile manufacturers (area density 600g/m2), which is used as the lower protective layer of HDPE geomembrane.
3.2 Sanjiang Treatment Project
In 2013, a major flood occurred in Heilongjiang Province. Subsequently, with the support of the state, the Sanjiang River governance project was carried out in the Songhua River, Nenjiang River, and Heilongjiang River Basins. The Sanjiang River Control Project is a national key water conservancy project. Its construction has enhanced the flood control and drainage capacity of the relevant river basins and comprehensive disaster reduction capabilities and protected and restored the local ecological environment. In the entire Sanjiang treatment project, a large number of non-woven polyester nonwoven geotextile factory price were used. Figure 2 shows the dam structure of some sections of the Sanjiang River treatment project.
In the dam structure of the Sanjiang River Control Project, the short-fiber needle-punched nonwoven high quality polyester nonwoven geotextile is used as a filtering structure because of its good water permeability and filtration property. Its main function is to protect the filling soil from being washed away by the water flow. Protect the safety and stability of the dam. In addition, in this dam structure, the nonwoven polypropylene nonwoven geotextile for sale also has the function of drainage and isolation.
3.3 Geoplastic foam embankment
The geotechnical foam embankment is a commonly used structure for treating soft soil foundations. The inner filling of the embankment is made of EPS (ie polystyrene foam) ultra-light material. Before placing the EPS block, a sand cushion layer with a thickness of 15-30 cm is laid on the excavated foundation, and a non-woven high quality polypropylene nonwoven geotextile with a certain strength is laid on the upper and lower interfaces of the sand cushion layer, and the non-woven polyester nonwoven geotextile for sale is laid. Should be laid horizontally.
In the geotechnical foam embankment, the non-woven polypropylene nonwoven geotextile factory price is laid on the soft soil foundation to exert a certain reinforcement effect, reduce the settlement of the embankment, and improve the embankment consolidation degree. The non-woven polypropylene nonwoven geotextile manufacturers used here also has the functions of filtration, drainage, and isolation. The soft soil foundation has high water content, and the non-woven polyester nonwoven geotextile factory price is used together with the sand cushion to form a very good water collecting and lateral drainage system. It can discharge groundwater in time and enhance the overall stability of the embankment.
3.4 Application of Nonwoven Geotextile in Sponge City
Sponge city construction is a project supported by the government. Sponge City is made up of a variety of facilities, and non-woven filament nonwoven geotextile for sale is an indispensable material in a variety of facilities. For example, in a green roof garden design, both the filter layer and the protective layer are made of non-woven wholesale polypropylene nonwoven geotextile, as shown in FIG.
As can be seen from Fig. 4, when the nonwoven high quality polyester nonwoven geotextile is used as a filter layer, it is disposed above the drainage layer to function as a water-permeable and soil retaining material. When the protective layer is used as a protective layer, its main function is to protect the waterproof layer from being damaged. In the process of promoting the construction of the sponge city, reasonable selection and use should be made according to the different characteristics of the nonwoven polypropylene nonwoven geotextile for sale.
4. The prospect of nonwoven filament nonwoven geotextile factory price
In China, the application of non-woven polyester nonwoven geotextile manufacturers started late, but it has spread rapidly. It has made important contributions to the infrastructure construction of all aspects of the country. At present, the repair of various civil engineering projects and the construction of new engineering materials are very demanding for non-woven high quality filament nonwoven geotextile. In addition to the current world’s strong promotion of protecting the ecological environment and preventing soil erosion, the high quality polypropylene nonwoven geotextile used for engineering slope protection have also been rapidly obtained. Development and application. China has become a major consumer of non-woven filament nonwoven geotextile manufacturers, and a large number of non-woven filament nonwoven geotextile factory price have also emerged. As the country pays more and more attention to environmental protection, there will still be a broad market for nonwoven polyester nonwoven geotextile for sale in the future:
(1) Railway construction: According to the national medium- and long-term railway network planning plan, by 2025, China’s high-speed railway mileage will exceed 30,000 km, as of 2015, 195,000 km has been completed, and 110,000 km has been built from 2016 to 2020, requiring about 66 million m2 of polypropylene nonwoven geotextile factory price. About 46,200 tons.
(2) Anti-seepage engineering: In the landfill, sewage treatment plant, pollutant storage pool, environmental protection, hydraulic engineering, building anti-seepage, and agriculture, non-woven high quality polypropylene nonwoven geotextile is used as a protective layer in combination with an anti-seepage geomembrane. According to the demand for anti-seepage materials of China’s geomembrane environmental protection project, the demand for non-woven high quality polyester nonwoven geotextile reached only 15 million tons in 2016 alone.
(3) Water conservancy: Of the existing 250,000 km dikes in China, 75% require basic treatment and reinforcement. Non-woven polypropylene nonwoven geotextile for sale has excellent filtration, drainage, isolation and reinforcement functions, which can make them more powerful in water conservancy.
(4) Sponge City Construction: The advancement of sponge city construction provides a new development platform for nonwoven polyester nonwoven geotextile factory price. Among them, the facilities related to non-woven filament nonwoven geotextile for sale include reservoirs, green roofs, complex biological retention facilities, percolation ponds, seepage wells, seepage pipes/canals, etc.
The amount of non-woven high quality filament nonwoven geotextile in China is huge, and the output is also increased accordingly. However, there is still a big gap between product quality and developed countries. Some key projects still need to use imported filament nonwoven geotextile manufacturers. In the future, China’s non-woven high quality polyester nonwoven geotextile industry will only be able to make up for the gap by constantly updating and developing its technology and equipment, and will no longer be subject to people. In addition, relevant personnel and organizations should also make more efforts in the development of non-woven high quality polypropylene nonwoven geotextile materials, in order to produce higher performance non-woven filament nonwoven geotextile factory price.