Geotextiles for drainage systems: types and selection criteria

Geotextiles for drainage systems: types and selection criteria

During construction of drainage system in qualities of element with the filtering action use geotextiles. It is composite material, strong and eco-friendly.

Its main function is to separate layers of different function. Several types of similar fabric so it is necessary to choose correctly suitable options depending on the field of use are created.

Types of geotextiles

During arrangement of drainage, geotextiles are applied as the filter. It does not allow to approach underground waters designs, separates the soil and fillers and also protects system from roots of tree and particles of the earth.

First of all geotextiles are subdivided into geofabric and geocloth. In production of the first (and this interlacing of 2 and more fibers) use both artificial, and natural raw materials. The cloth is made by nonwoven method with use of exclusively synthetic components. To its thicket use in drainage systems, and here geofabrics usually use for creation of special volume designs.

There are several types of material depending on operating conditions. On raw materials which is used in production emit the following fabrics:

  • from polyair and polypropylene.
  • from staple raw materials and monothreads;
  • from mixed threads.

The second option perfectly is suitable for drainage. Differs in high strength, reliability. The third – absolutely cannot be used for filtration. And here polyester and polypropylene materials are considered as the most qualitative. But it is necessary to consider that products from the first component are not suitable for moisture, and from the second – it is possible to use absolutely in any conditions.

Depending on method of manufacture allocate igroprobivny and the thermofastened geotextiles. For drainage it is the best of all to use the first. It has perforated surface. The punched openings are located chaotically, and their diameter gives to cloth excellent filtrational properties. The second option has more high strength, but because of heat treatment has waterproof effect, i.e. badly passes moisture.

The choice of geotextiles for drainage

The market offers huge number of geotextiles. It is necessary to know features and requirements to means for drainage system.

It is impossible to use cloth which is made of mixed materials. Over time cotton threads will be washed up because of what worsen ability of fabric to filter liquid. After a while all system needs repair, and these are additional expenses.

The only optimal variant – monothread. To define roll of such products among other will be simply – on snow-white shade.

It is also necessary to pay attention to filtration coefficient. Producers always specify indicator. Ideal option – 125-140 m/days. Higher characteristics are required only in situations when fabric is located in the soil with high water influx.

There are also other requirements to geocloth density for drainage that is connected with tolerance level of loading. For longitudinal the parameter is 1.9-3 kN/m, for cross – 1.5-2.4 kN/m. The general durability is not less than 500 N.

The price depends on such indicators. You should not save since low-quality material quickly will be damaged and required its replacement. Other characteristics (for example, roll width) approach any. They are chosen, considering the section of the filtering layer.

Geotextiles perfectly are suitable for installation of systems of the closed type. It carries out all assigned tasks thanks to the main qualities. Material is universal, but its choice depends on specific types of drainage, soil, level of underground water in the territory. It can be applied to strengthening of soil - to learn in more detail.

Author: «MirrorInfo» Dream Team