The Difference between Geotextile and Waterproof Geotextile Geocomposite


Before we tell the difference between geotextile and waterproof geomembrane,we need to know what is geotextile and what are waterproof geotextile geocomposites.

What is geotextile:

According to the production process, geotextile is divided into woven geotextile and non-woven geotextile. Non-woven geotextile is divided into polyester filament geotextile, staple fiber geotextile and polypropylene geotextile.

Characteristics of geotextile membrane:
1. High strength. Due to the use of plastic fiber, it can maintain full strength and elongation under dry and wet conditions.
2. Corrosion resistance, in different pH of soil and water can be long-term corrosion resistance.
3. The water permeability is good because there is a gap between the fibers, so it has good water permeability.
4. Good anti microbial property will not damage microorganism and moth.
5. The construction is convenient. Because the material is light and soft, it is convenient to transport, lay and construct.
6. Complete specifications: mass per unit area: 100-1000g / m2

What is waterproof geotextile:

Waterproof geotextile fabric also called Geomembrane Composite is a general designation of geocomposite geomembrane, which is composed of geomembrane and geotextile, playing a waterproof role, while geotextile membrane is permeable.

Specification of waterproof geotextile:

geotextile geomembrane geocomposite

Needle punched non-woven fabric and PE film composite geotextile, specifications include one cloth one film, two geotextile cloth one film, and three cloth two films, the maximum width of 6m, main raw material is to use polyester staple fiber needle punched non-woven fabric, PE film is made by composite.

So the two materials have different uses. Waterproof geotextile is mainly used for anti-seepage. It is suitable for railway, highway, tunnel, subway, airport and other projects.

Features of waterproof geotextile:

Nonwoven and spinning composite geotextile, the variety of nonwoven and polypropylene filament woven composite, nonwoven and plastic woven composite, suitable for foundation reinforcement, adjustment of permeability coefficient of infrastructure.

As the protective layer of geomembrane, geotextile can protect the impervious layer from damage. In order to reduce ultraviolet radiation and increase anti-aging performance, it is best to use embedding method.

The connection between the composite geomembrane and the surrounding structures shall be anchored by expansion bolts and steel plates, and the connection part shall be coated with emulsified asphalt (2mm thick) for bonding to prevent leakage.

Waterproof geotextile and geotextile should be reasonably selected according to different specifications and use environment, one is permeable reinforcement, the other is anti leakage.

Difference between composite waterproof geotextile membrane and geotextile

GTM Geotextile is a kind of material made of non-woven fabric, which is also one of the components of composite watreproof geotextile . Through the addition of geotextile, the reinforcement level of membrane material can be further improved, and the efficiency of construction process can be naturally improved.

In general engineering, the requirements for composite waterproof geotextile are very high. All materials stacking sites must be located at the higher terrain to prevent surface water erosion. It is not only required that the material can have higher anti-seepage performance.

The composite geotextile is composed of non-woven fabric, which not only provides reinforcement and protection for the membrane, but also plays the role of drainage and exhaust.

The composite watreproof geotextile is composed of polyethylene geomembrane as the impervious body and short fiber needle punched geotextile with excellent performance of isolation drainage and waterproof by hot pressing.

What is a non woven geotextile?

Needled punched nonwoven geotextile fabric belongs to a kind of non-woven fabric, which is made of polyester and polypropylene fiber, and is properly hot-rolled after needling for many times.

According to different processes and materials, hundreds of products can be made, which can be used in all walks of life, and various specifications can be customized according to different purposes.

Needled punched nonwoven geotextile fabric is a kind of nonwovens. It is to loosen, comb and lay short fibers into a fiber net, and then strengthen the fiber net into a cloth through a bayonet. The bayonet has a hook and thorn, and the fiber net is repeatedly punctured, and the hook belt fiber is reinforced to form needled non-woven fabric. The non-woven fabric is not divided into warp and weft, and the fabric fibers are disordered, with little difference in meridional and latitudinal properties. Typical products: synthetic leather base cloth, needle punched geotextile, etc.

Needled punched nonwoven geotextile fabric

Processing principle:

The production of non-woven fabric by needling method is completely through a mechanical function, that is, the needling effect of needling machine, which can strengthen and hold the fluffy fiber mesh to obtain a strong force [1].

The basic principle is:

The barber with barb on the edge of triangle section (or other section) is used to puncture the fiber mesh repeatedly. When the barb passes through the web, the fibers on the web surface and local inner layer are forced into the web. Due to the friction between the fibers, the original fluffy web is compressed. When the needle exits the web, the inserted fiber bundle breaks away from the barb and remains in the web. In this way, many fiber bundles entangle the web so that it can no longer return to its original fluffy state. After many times of needling, quite a lot of fiber bundles are punctured into the web, which makes the fibers in the web entangle with each other, thus forming needled nonwovens with certain strength and thickness.

The needled nonwovens include pre-needling, main needling, pattern needling, ring needling and tube needling.

Needled punched nonwoven geotextile machine

The development of China needle punched geotextile:

The proportion of needled non-woven fabric in the non-woven fabric production line is 28-30%. In addition to being used for conventional air filtration and dust control, the new application space of needled non-woven fabric is being expanded, including transportation, industrial wiping.

In fact, any combination of nonwovens is possible, which makes its properties adapt to special and more application requirements under ideal conditions.

The standardization problems of non woven geotextile filter fabric products, such as the big gap in standards and the lag in revision, are also paid attention to by the production and application parties.

Industrial textiles are involved in health, safety, environmental protection and other fields. According to the standardization law, compulsory standards should be formulated, but the existing compulsory standards are less, which also affects the unity of the standard indicators and the implementation.

On the one hand, product producers tend to pay attention to the general performance of products and use the relevant recommended national standards or industry standards drafted by the geotextile industry; while product users tend to pay attention to the engineering performance of products and use the relevant industry specifications, which is quite contradictory.

In addition, the standard system is not in line with international standards. In view of the insufficient centralized management of China’s industrial textiles industry, the lack of institutions that pay close attention to and specialize in the study of international and foreign advanced industrial textiles standards, the insufficient collection, summary and analysis of relevant standard information, resulting in inconsistent index requirements and testing methods with international standards.

Industrial textiles have different uses, which are unfamiliar and complex to other textiles. It is a test for all personnel including experts in the relevant links of industrial textiles.

Therefore, the consensus of the industry is to give full play to the enthusiasm and role of industrial textiles associations at all levels, accelerate the formulation and revision of industrial textiles standards, and jointly promote the scientific and standardized operation of industrial textiles standardization.

In China you can find the geosynthetics manufacturers to get the nonwoven geotextile fabric price.

Geotextile Types and Functions

Geotextile Introduction:

Geotextile, also known as film geotextile, is a kind of geosynthetic material, which is the general name of geosynthetic fiber fabric. It has gone beyond the scope of fabric, generally divided into woven geotextile membrane, non-woven geotextile fabric, synthetic and composite, widely used in water conservancy, power, transportation, construction, airport, environmental protection and other projects.

Under suitable conditions, the service life of geotextile can reach 50-100 years. The practice shows that the strength of geotextile produced bu China geotextile manufacturers remains above 80% after 10 years of burying. According to foreign data, the strength of geotextile is still about 75% after 20 years.

geotextile types

Geotextile membrane Applications :

Geotextile and geomembrane fabric has been widely used in developed countries. At present, nearly 900000 tons of non-woven fabrics are consumed in polyester and polypropylene fibers as the main raw materials.

The widespread use of geotextile film has a great impact on the project, which greatly improves the quality of the project. Geotextile is also widely used in water conservancy projects, using geotextile filtration, drainage, isolation, and other functions and combinations, widely used in railway, highway subgrade treatment, seaport, construction, subway, municipal, civil buildings, etc.

Geotextile is widely used in industry, transportation, energy, agriculture, water conservancy, environmental engineering, land transformation and other fields.

Reinforce or anchor retaining walls in backfill. Construction of surrounding retaining walls or abutments. Strengthen flexible pavement, repair pavement cracks and prevent reflection cracks. Improve the stability of gravel slope, strengthen the soil, and prevent the soil from erosion and frost damage under low temperature. Isolation layer between ballast bed and subgrade or between subgrade and soft subgrade. Artificial fill, rockfill or the separation layer between material field and foundation, as well as the separation layer between different permafrost layers, filtering and strengthening.

geotextile functions

Geotextile Membrane Functions :

  1. Filter layer function: geotextile has good permeability, which can effectively intercept soil particles, yellow sand and small stones, filter water, and maintain the stability of earth rock engineering.
  2. Drainage function: nonwoven geotextile has good water conductivity, which can form drainage channels in the soil and remove excess water in the soil structure.
  3. Isolation function: geotextile is used to isolate different building materials, such as soil and sand, sand and gravel. Soil and concrete can use two or more materials at the same time without losing or mixing, so as to maintain the overall structure and function of materials and improve the bearing capacity of buildings.
  4. Reinforcement function: the geotextile buried in the soil can improve the tensile strength and deformation resistance of the soil, and improve the stability of the building structure
  5. Protection function: geotextile can effectively disperse, transfer or decompose the concentrated stress and prevent the soil from being damaged by external force.
  6. Anti seepage function: the geomembrane or composite waterproof material can effectively prevent the leakage of water or other liquids, protect the environment and the safety and stability of the construction project