Group member Supervisor
ID : 11126269
Md.karimul Islam sagar
ID : 12129621
ID : 12129653
Miss. Rabeya Islam
Department: Textile Engineering
Background of Geotextile.
Typical Geosynthetic materials.
Raw materials of Geotextiles.
Basic properties of Geotextiles.
Function of Geotextiles.
Various types of Geotextiles & Application.
Conclusion & Recommendation.
Background of Geo textiles:
The prefix of geotextile, geo, means earth and the ‘textile’ means fabric.
Therefore, the geotextile is defined as follows:"A permeable geosynthetic
comprised solely of textiles.
First applications of geotextiles were woven industrial fabrics used in
1950’s. One of the earliest documented cases was a waterfront structure
built in Florida in 1958.
The first nonwoven geotextile was developed in 1968 by the Rhone
Poulence company in France. which was used in dam construction in
France during 1970.
There are a number of factors that will help to determine the durability of a geotextile:
Physical structure of the fabric
Nature of the polymer used
Quality and consistency of the manufacturing process,
Physical and chemical environment in which the product is placed,
Condition in which the product is stored
Raw materials of Geotextile:
The four main polymer families most widely used as the raw material for
Basic properties of Geotextile:
Stress crack resistance
increasing stiffness or hardness
increasing chemical resistance
Separation: Separation function is defined as “The preventing from intermixing of
adjacent dissimilar soils and/or fill materials by the use of a geo textile.Geotextiles function to
prevent mutual mixing between 2 layers of soil having different particle sizes or different
Drainage: Drainage function is defined as The collecting and transporting of
precipitation, ground water and/or other fluids in the plane of the geo textile. In drainage
system, geo textiles are used to flow water over the plane surface of the soil with
minimum pressure of the water over soil.
Filtration: Filtration function is defined as The restraining of soil or other particles subjected to
hydrodynamic forces while allowing the passage of fluids into or across a geo textile.Filtration
involves the establishment of a stable interface between the drain and the surrounding soil.
Reinforcement : Reinforcement function is defined as The use of the stress-
strain behavior of a geo textile or a geo textile-related product to improve the
mechanical properties of soil or other construction materials.
Protection: protection function is defined as The prevention or limiting of local
damage to a given element or material by the use of a geo textile. Waste disposal
system and tunnel constructions are also depends on geo textiles.
Three main types of Geotextile:
Fig.: Non-woven geotextile fabrics. Fig: Woven geotextile fabrics.
Fig: Specialty Geotextile fabrics
Roads and other trafficked areas
Earthworks, foundations and retaining structures
Erosion control works
Reservoirs and dams:
Canals - Intended uses
Tunnels and underground structures
Solid waste disposal
Liquid waste disposal
Various types of Geotextiles:
Woven Geotextiles are made from weaving monofilament, multifilament yarns,
They have high tensile strength and low elongation properties.
Separator cum reinforcement for paved/unpaved roads
Basal reinforcement of embankments on soft ground
Sub grade stabilization
Reinforced soil steep slopes
Filters for hard armour erosion control systems
Advantages of using nonwovens:
Resistance to rotting, chemicals, bacteria and fungi.
Temperature fluctuation tolerant
Some examples of where nonwovens are used
Road and rail building
Dam, canal and pond lining
Soil stabilization and reinforcement
Classification of Nonwoven Geotextile:
Light Weight Nonwoven Geotextiles.
Medium weight nonwoven geotextile.
Heavy weight nonwoven Geotextiles.
Spun bond nonwoven Geotextiles.
Three main types of Geotextile.
Classification of specialty Geotextiles:
Aero modeling Geotextile:
Cost Effective & Adaptable Tough
Surface Easy To Repair
Simple to Install
Marine Recovery Geotextile:
Catch Paint Chips
Cleaner & Safer Pads
polyurea geotextiles are specifically manufactured to perform at the highest level when sprayed with
Jute Geotextile is much cheaper than synthetic fiber.
It is easy to blend with other natural material and synthetic fibers.
Jute Geotextile is environmental friendly, biodegradable, hydrophobic, anionic and locally available
Initially it has got the high strength and non-hazardous properties.
It is also a renewable source of energy as natural biomass
Conclusions and recommendations:
Detailed investigations into the German practice of using nonwoven geotextiles as an
interlayer between cementations layers in concrete pavements resulted in the development of
U.S. material specifications and construction standards.
Currently in the U.S., nonwoven geotextiles are not commonly used in concrete pavements as
an interlayer between cementations layers.
The German experience, however, offers more than 25 years of working with this process and
has demonstrated that it offers improvements if done properly.
Drawing on German expertise, and incorporating U.S. innovation, the FHWA hopes to prove
the processes right by promoting this innovative practice and encouraging contractors to try it