Technical textile

Course code:TEX308

Topic: Geo textile

Group member Supervisor

Anik deb

ID : 11126269

Md.karimul Islam sagar

ID: 11126200

Farooq

ID:

Md.Abdul Ohab

ID : 12129621

Md.Ariful Islam

ID : 12129653

Md.Soliaman Sikder

ID: 12129624

Md.Ebrahim Anwar

ID: 12129557

Miss. Rabeya Islam

Lecturer

Department: Textile Engineering

City University

Overview:

Background of Geotextile.

Initial Consideration.

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.

Initial consideration:

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

Typical geosynthetic materials:

Geogrids

Geonets

Geotextiles

Geomembranes

Geosynthetic Clay Liners

Geopipe

Geocomposites

Raw materials of Geotextile:

The four main polymer families most widely used as the raw material for

geotextiles are:

Polyester

Polyamide

Polypropylene

Polyethylene

Basic properties of Geotextile:

Tensile strength

Elongation

Impact strength

Stress crack resistance

Heat 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

properties.

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

.

Main Application of Geotextiles:

ir

Roads and other trafficked areas

railways

Earthworks, foundations and retaining structures

drainage systems

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: Woven Geotextiles are made from weaving monofilament, multifilament yarns,

They have high tensile strength and low elongation properties.

Applications:

Separator cum reinforcement for paved/unpaved roads

Track-bed stabilization

Hard standages

Slit-fence

Basal reinforcement of embankments on soft ground

Area stabilization

Sub grade stabilization

Reinforced soil steep slopes

Filters for hard armour erosion control systems

Geotextile tubes

Classifications of woven Geotextiles:

TerraTex Woven Geotextiles

Woven Monofilament Geotextiles

Polypropylene Woven Slit Film Geotextile

Polyester Woven Multifilament Geotextile

Polypropylene Woven Multifilament Geotextile

Woven Reinforcement Geotextiles

Woven Stabilization and Separation Geotextiles

Woven Filtration Geotextiles.

Nonwoven geotextile:

Advantages of using nonwovens:

Elasticity

Permeability

Low humidity

Absorption

Resistance to rotting, chemicals, bacteria and fungi.

Lightweight

Temperature fluctuation tolerant

Stress-relieving

Some examples of where nonwovens are used

Road and rail building

Dam, canal and pond lining

Hydraulic works

Sewer lines

Soil stabilization and reinforcement

Soil separation

Drainage

Landfill

Filtration

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:

Environmentally Friendly

Catch Paint Chips

Cleaner & Safer Pads

Polyurea Geotextiles:

polyurea geotextiles are specifically manufactured to perform at the highest level when sprayed with

polyurea.

Jute Geotextiles:

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

materials.

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

for themselves.

THANK YOU ALL