Geotextile is permeable fabric which has capacity to separate moisture from surface. It is made of polyester. Geo grids, geo synthetic clay liners, geo nets and geo textile tube are geotextile materials which provide a lot of benefits in geo technical and environmental engineering design. These products are installed or applied in construction site, roads, civil engineering, canals, dams, airfields and retaining structure etc. It is normally installed to strengthen the area or the soil. This material brings improvement in soil strength at lower cost comparatively and also improves the sloppy area for planting.
It provide protection against erosion of earth and prevent leaching of fine material. This type of waterproofing material can easily be placed under water. There are different types of it all these are applied to improve the soil condition or characteristics because of its property to separate, protect, drain, filter and reinforce the soil.
All types of geotextile are used to protect the characteristic of soil are mentioned below:
- Open mesh or woven geotextile
- Closed fabric or non-woven geotextile
- Knitted geotextile
Functions of Geotextile
Geotextile is a waterproofing material commonly used in civil engineering works to improve the soil condition. Because of this membrane installation the poor soil can easily be made more manageable and soil become ready for construction purpose. Projects associated with landfills, drainage structures and other civil projects are accomplished by the installation of this membrane.
It is used for specific purposes which are mentioned below:
- Filtration and drainage
- Sealing and protection
When there is need to different two soil materials then the geotextile play an important role. With the help of this differentiation with this waterproofing material the separation of dissimilar material becomes possible and required soil characteristics are easily obtained for construction purpose.When water enters in soil this membrane creates a barrier for water to enter it prevent soil from mixing with water. The drainage characteristics of soil are kept active during installation of this membrane the thickness and permeability of this layer prevent soil contamination and allows water to flow for drainage.
Filtration and drainage
In this function of this layer water is allowed to move in both directions by promoting the flow of drainage water. It can be installed vertically and horizontally.
This waterproofing layer performs its reinforcement function by movement restraint, by making changes in bearing failure plane and by support of loads. The installation of this membrane is recommended to have design as parameter by expert geotechnical engineer.
Sealing and Protection
Fabric used in the production of geotextile makes it impermeable and brings capacity to restrict the flow of water. It is used to prevent contamination of underground water from pollutant particles with the help of geotextile sealing and protection is insured.