This document discusses geotextiles, which are permeable fabrics that are used in civil engineering and construction projects. Geotextiles can serve several functions, including separation of dissimilar soil layers, drainage, filtration, and reinforcement. The document provides details on the history and development of geotextiles, their various forms and materials, required properties, main functions, applications in Bangladesh, and prospects for future use and production of geotextiles in Bangladesh.

1. Presented By:
Md. Mamun Mia ID. 142-23-148

2. Geotextiles were originally intended to be an alternative to granular soil filters.
The original, and still sometimes used, term for geotextiles is filter fabrics. Work
originally began in the 1950s
Geotextiles are generally used for four applications i.e. separation, filtration,
drainage & reinforcements. The wide use of geotextiles is under the structure
of road due to which life of road increases. Geotextile is also used for
preservation of riverbanks, coastal protection, dams, water canals etc. geotextile
is also used under the structure of railway tracks as a shock absorber in order to
improve the life of railway tracks
History

3. •Geotech segment comprises of technical textile products used in Geotechnical
applications pertaining to soil, rock, earth etc.
•This class of product is loosely called Geotextiles.
•However Geotextiles particularly refers to permeable fabric or synthetic material, woven
or non-woven, which can be used with geotechnical engineering material.
Geotech:

4. Used:
Geotextiles are permeable fabrics which used in association
have the ability to separate, filter, reinforce, protect, or drain.
Typically made from polypropylene or polyester.
Forms: Woven (resembling mail bag sacking),
Needle punched (resembling felt) or heat bonded
(resembling ironed felt).
Used and Form:

5. 1 . Mechanical properties:
a) Tensile strength
b) Bursting strength
c) Drap ability
d) Compatibility
e) Flexibility
f) Tearing strength
g) Frictional resistance
h) Tenacity
Required Properties of geo-textiles:

6. 2. Physical properties:
a) Specific gravity
b) Weight
c) Thickness
d) Stiffness
e) Density
3. Hydraulic properties
4. Degradation properties:
5. Endurance properties:
Required Properties of geo-textiles:

7. :
1. Separation:
Geotextiles will prevent two soil layers of different particle sizes from
mixing with each other.
2. Drainage:
Geotextiles will efficiently collect superfluous water from structures, such
as rainwater or surplus water, from the soil and discharge it.
3. Filtration:
Geotextiles are an ideal interface for reverse filtration in the soil adjacent
to the geotextile.
4. Reinforcement:
Heavy geotextiles can be used to reinforce earth structures by means of
fill materials
5. Protection:
Geotextiles are an ideal protection from erosion of earth embankments by
wave action.
5 main functions of geotextiles

8. Raw materials of geo-textile

9. Classification
Geo Textile
Woven Geo
Textile
Non Woven Geo
Textile
Others woven and
non woven
combination
Knitted Geo Textile
 Woven
Monofilament
 Woven
Multifilament
 Woven slit film
monofilament
 Woven slit film
multifilament
 Non woven
continuous filament
heat bonded
 Non woven
continuous filament
needle punched
 Non woven staple
needle punched
 Non woven resin
bonded

10. A silt fence on a construction site.
 Civil engineering applications
 Including roads,
 Airfields,
 Railroads,
 Embankments,
 Retaining structures,
 Reservoirs,
 Canals,
 Dams,
 Bank protection,
 Coastal engineering
 Silt fences
Applications

11. - Serves as a barrier and filtration
- Stabilization of soil
- Consistent
- Cost-effective
- Longevity of structure
Benefits of Geotextile Filter Fabrics:

12. 1. Application in Jamuna River bank administration for
Bangabandhu Bridge.
2. Dhaka - Sylhet Highway:
3. Aricha Highway.
4. All types of land filling.
5. DND Dam (embankment).
6. Gomti Dam (embankment).
7. Tista Barrage.
8. Teknaf Coastal works.
9. Airport.
10.All types of Bridge construction.
Geo-textile in Bangladesh

13. Prospect of Geo textile in Bangladesh is very much for
following reasons:
1. Lot of scope for application of Geo-textile in
Bangladesh.
2. Production of Geo-textile in Bangladesh.
a. Jute Geo-textile.
b. Synthetic Geo-textile
Prospect in Bangladesh