Presentation on Geo-Textile

1. Green University of Bangladesh
Welcome to Our Presentation
Course Name: Technical Textiles
Course Code: TEX 401
Submitted To:
Md. Nabayal Shahed
Lecturer
Department of Textile
Green University Of Bangladesh
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2. OUR TEAM:
Rubaiya Islam Priya
ID: 211903009
Section: Day
Batch: 211
Department of Textile
MD.Al- Mamun
ID: 211903010
Section: Day
Batch: 211
Department of Textile
Jannatul Hashan
ID:202903007
Section: Day
Batch: 202
Department of Textile
Nahid Hasan
ID: 211903007
Section: Day
Batch: 211
Department of Textile
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3. ❏ Geo-Textile ● A geotextile is a synthetic
permeable textile material
used with soil, rock, or any
other geotechnical engineering
related material.
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4. TABLE OF CONTENTS
Geotextile is a branch of
technical textiles.
Explain The Geo Textile
and Main Functions of
Geotextiles
Types of Geotextile
Geo-textiles are a
differentiated synthetic
material made with
textile materials.
Characteristics or
Properties of
Geotextiles
Both natural and manmade
fibers are used to produce
geotextiles.
Applications of
Geotextiles
Geotextiles are used in
various infrastructural works,
which increase the strength
of weak nature soils and
prevent erosion.
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5. What is Geotextiles?
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6. ● Geotextiles:
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❏ A geotextile is a synthetic permeable textile
material used with soil, rock, or any other
geotechnical engineering related material.
❏ Geotextile’ can be separated into two
terms, ‘geo’ and ‘textile’. The word ‘geo’
comes from the Greek meaning ‘earth’,

7. ❏ What Are the Main Properties of Geotextile?
● Geotextile requires three types of properties– Mechanical
Response, Filtrationg Ability, Chemical Resistance.
1. Mechanical Responses
2. Filtration ability
3. Chemical Resistance
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Main Functions of Geotextiles:
● Geo-textiles are commonly used
to improve the soil on which
roads, dams, pipelines and large
infrastructure are built.
✓ Geotextiles for Separation
✓ Geotextiles for Reinforcement:
✓ Geotextiles for Filtration:
✓ Geotextiles for Sealing
✓ Geotextile in Drainage System

9. Figure 5: Geotextiles for Drainage
Figure 4: Geotextiles for Sealing
Figure-3: Geotextiles for Filtration
Figure 2: Geotextile for soil reinforcement
Figure 1: Geotextiles for Separation
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Types of Geotextiles
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11. ❏ Types of Geotextile:
Geo-textiles are a differentiated synthetic material made with textile
materials. These are usually made from polymers like polyester and
polypropylene. There are four main types of geotextiles-
❏ Woven Geotextiles: These types of textiles perform the
function of separation and increase the strength of the soil. As the
yarn strength of their warp is much higher, they have more tensile
strength. As a result, it is able to take much more load. There are
various types of woven geotextiles like woven monofilament,
woven multifilament, woven slit-film monofilament and slit-film
multifilament.
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Woven Geotextile

12. ❏ Nonwoven Geotextiles:
● In case of nonwoven geotextiles, tensile strength is not very high, but their
Separation, Drainage and Filtration ability is better than others.
Non-woven geotextiles are permeable geosynthetics, usually made of
synthetic fibres. Thermal and chemical bonding are also used to make
non-woven geotextiles. There are various types of nonwoven geotextiles
like continuous filament heat bonded, continuous filament needle punched,
staple needle punched, resin bonded.
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Non-woven Geotextiles

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❏ Knitted Geotextiles:
● These types of textiles have good flexibility and are economically profitable.
Although its use is less, the demand for “Drainage and Soil Erosion Control” is
increasing day by day. Knitted geotextiles are made by using knitting
technology, sometimes weaving is used to make these products.

14. ● In the world of fabric production, the spunbonded process is
considered as the fastest production method for non-woven
fabrics. During the process, the extruded filaments are cut into
the belt and the rolls are heated and held together.
❏ Spunbonded Geotextiles:
Spunbonded geotextile
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15. ● Braiding is generally used for producing narrow rope-like
materials by interlacing diagonally three or more strands of
filaments or yarns. The topology of strand interlacements in
braided structures is similar to that of woven structures.
❏ Braided Geotextile:
Braided Geotextile
● In addition to these types of geotextiles, other geo-textile
products are geo-nets, geo-grids, geo-cells,
geo-membranes, geo-composites etc. Each of these has its
own characteristics and is used for special applications.
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16. Heat-Bonded Non-Woven Geotextiles These fabrics are produced
by carrying out the following steps— 1. Lying continuous fine
filaments into a moving belt randomly 2. Passing them between
heated roller systems 3. When the hot roller melts the filaments
partially, they acquire their coherence and strength They form a
thin sheet of textiles. This process is limited to products with less
thickness.
❏ Heat-Bonded Non-Woven Geotextiles
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17. Needle-Punched Non-Woven is produced by passing blended
webs of continuous or staple filaments through banks of several
reciprocating barbed needles. When the needles create
entanglements among the filaments, they acquire their coherence
and strength. In this process, thickness up to 10mm and weight
up to 2000g/m-2 can be achieved.
❏ Needle-Punched Non-Woven Geotextiles:
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18. Characteristics
or Properties of
Geotextiles
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19. ● Both natural and manmade fibres are used to produce
geotextiles. However, the most used is manmade (synthetic)
fibre.
❏ Fibres Used to Make Geo-textiles:
❏ Natural Fiber: Natural fibers are collected from natural origins like
Plants (leaf, seeds, barks etc.), Animals, Minerals etc. Geotextiles, which are
made from natural fibers have some characteristics like robustness,
durability, strength, good drape ability and biodegradability. However,
natural fibers are used less than before in making geotextiles.
1. Jute Fiber
2. Ramie Fiber
3. Coir Fiber
4. Flax Fiber
5. Sisal Fiber
6. Hemp Fiber
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20. ● Geotextiles, which are made from synthetic fibers, called
geosynthetics. So, all geo textiles are not geosynthetics but all
geosynthetics are geotextiles. Polyester and Polypropylene are
most commonly used in making different types of geotextiles
products.
❏ Manmade or Synthetic Fiber:
❏ Polyester
❏ Polypropylene
❏ Polyamide
❏ Polyethylene
❏ PET 20

21. ❏ Characteristics or Properties of Geotextiles:
❏ Physical Properties:
● Specific gravity
● Weight and thickness
● Stiffness
● Density
❏ Mechanical Properties:
● Tenacity
● Tensile strength
● Compatibility
● Flexibility
● Tear strength
● Frictional resistance
❏ Hydraulic properties:
● Porosity
● Permeability
● Permittivity
● Transitivity
● Soil retention
● Filtration
● Biodegradation
● Hydrolytic degradation
● Photo degradation
● Chemical degradation
● Mechanical degradation
● Endurance Properties:
● Elongation
● Abrasion resistance
● Clogging length and flow etc.
❏ Degradation Properties:
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22. Applications of Geotextiles
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23. ➢ Applications of Geotextiles:
■ Some of the notable uses are-
● Temporary & Permanent Roadways, Parking lots &
Construction sites.
● River, Canals & Coastal works.
● Filtration & Drainage
● Separation
● Agriculture
● Railway works
● Reinforcement
● Protection & erosion control
● Retaining wall structures
● Embankments etc.
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❏ Geotextiles are used in various infrastructural works,
which increase the strength of weak natural soils and
prevent erosion. As a result, unsuitable places become
suitable for building / civil construction.

24. ❏ Benefits of Using Geotextiles:
● Geotextiles are used to protect coastal property from
sand waves and floods. Geo textiles can improve the
soil strength at a lower cost than the conventional
pipes.
● Geo textiles have been used to protect the hominid
footprints of Laetoli’s fossils in Tanzania from the
rains and tree roots.
● Geotextiles play an important role in drainage and are
used in playgrounds.
● Coir geotextiles are popular for corrosion control and
biotechnology, due to the significant mechanical
strength of the fabric. To enrich the soil, the product
moisture is reduced.
● Geo textiles are used extensively as separators of the
two layers of soil. Jute geotextiles are used to prevent
mountain landslides.
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25. ❏ Geo-textiles Manufacturing and
Exporting Companies in Bangladesh:
Along with other technical textiles, the geotextiles
sector is also not lagging behind. There are several
companies in Bangladesh which are supplying
geotextiles in different countries of the world such
as: North America, Eastern Europe, East Asia,
Africa, South America, Southern Europe, South Asia,
Central America, Middle Eastern countries.
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26. ❏ What are the advantages of geotextile?
There are many advantages of geotextile such as:
● Cost-saving material.
● Increase construction speed.
● Achieved supplementing.
● Improve quality.
● High in strength.
● UV resistance.
● Rot resistance.
● Resists biological degradation.
● Chemically inert.
● Increases the life of the road.
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27. ❏ Some of the geotextiles suppliers in
Bangladesh are-
● BST Engineering & Galvanising.
● M/s. Knit Sew Combination.
● Xtra Power Bangladesh.
● Seconds Industries Ltd.
● Traditional Bangladesh
● Rohani Fabrics.
● Al Salam Fabrics (PVT.) Ltd.
● United Tex (BD) Int’l Ltd.
● DIRD Felt Ltd.
● B.J. Geo-Textile Ltd.
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❖ Conclusion:
❏ The new revolution in civil engineering is geotextile,
geotextiles are being used extensively in various civil
engineering projects. This material is used in roads, river
erosion control, drainage, separation, filtration, river-canals
and coastal works. Like other technical textiles, the demand
for geo-textiles in the world market has increased. As a result,
new possibilities have emerged.

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