ppt on geotextiles

1. GEOTEXTILE

2. CONTENTS
 1 . Introduction .
 1.1 Definition.
 2 . Functions of geotextiles.
 3 . Classification
 4 . FIBRES USED IN GEOTEXTILE
 5 . Production process of geotextiles
 6 . FORMS OF GEOTEXTILE
 Application of geotextiles
 References

3. FUNCTIONS AND APPLICATION OF GEOTEXTILE
Application Geotextile function
Reinforcement separation Filtration Drainage protection
Roads P T T S T
Rail roads S P S P T
Surface T S P T T
drainage
Steep sloper P T T S S
Land fills S P P S P
Walls P T T T T
Soil P T S S T
reinforcement
Coastal P T P S T
protection

4. PROPERTIES OF NATURAL FIBER
TYPE OF FIBER
Property Flax Jute Hemp Sisal Abaca Coir
Fiber 200-1400 1500-3600 1000-3000 600-1000 1000-2000 150-350
length(mm)
Fiber 0.04-0.62 0.03-0.14 0.16 0.1-0.46 0.01-0.28 0.1-0.45
diameter
(mm)
Fiber linear 2-20 14-20 3-22 10-450 40-440 -
density
(d/tex)
Fiber 0.54-0.57 0.41-0.52 0.47-0.60 0.36-0.44 0.35-0.67 0.18
tenacity
(N/tex)

5. SYNTHETIC FIBERS
SYNTHETIC FIBERS:-
polypropylene
Polyester
polyamide(nylon 6,nylon 66)
polyethylene.
Polypropylene:-
Advantage :-
low density results low cost per unit volume
acceptable tensile property
high fatigue resistance.
Disadvantage:-
Sensitive to ultra violet radiation
Sensitive to high temperature

6. Polyester :-
Superior Creep Resistance
C
Have High Tenacity Values
Suitable For High Stress Application S
Suitable For Elevated Temperature Applications Near
About180 - 200 C
High Abrasion Resistance
High Resistance To Ultra Violet Rays.
High Modulus
Example: Roofing, Separation And Filtration Applications
Polyamides:-
High Strength And Creep Properties .
Fabric structures and finishing treatments influence their properties

7. PROPERTIES OF SYNTHETIC FIBRE

8. FORMS OF GEOTEXTILE
 Geomembrane
 Geogrids
 Geonets
 Geocomposite
 Geomat
 Geocell
 Biomet and Bionet

9. GEOMEMBRANES:-These are used primarily for linings
and covers of liquid or solid storage facilities .These are essentially
impermeable material in the form of manufactured sheet which may
be synthetic. Thus the primary function is always as a liquid or gas
barrier .The range of application is very high. These are act as a
barrier for flow of water or any hazardous liquid. The simplest
example is canal lining
Non-Woven Compound Geo membrane

10. GEOGRIDS
 These can be in the form of manufactured sheet, consisting of a
regular network of integrally connected elements, which may be
linked by extrusion , bonding.
 Have high tensile strength and dimensional property at very low
elongation.
 Coated polyester geogrids widely used in soil stabilization and
Geotechnical reinforcement of retaining walls and embankment
applications.
 Biaxial geogrids are used as separator in between sub grade and
aggregate
 Woven /knitted polyester coated geogrid used for wall retaining
applications

11. fiberglass geo grid composite
with non woven geo textile

12. ACCORDING TO PHYSICAL STRUCTURE GEOGRIDS
CAN BE CLASSIFIED INTO FOLLOWING
CATEGORIES .
 Unidirectional Geogrid:-possessing high tensile strength in one
direction (that is longitudinal and transversal) than in the other
direction.
 Bidirectional Geogrid:- possessing similar tensile strength in
both direction that is longitudinal and transversal.
 Extruded Geogrid:-produced by stretching uniaxially or
biaxially an extruded integral structure .
 Bonded Geogrid:- produce by bonding stretching right angles ,
two or more sets of strands filaments and yarns.
 Woven Geogrid:- produce by interlacing at right angle, two or
more sets of strands filaments and yarns.

13. GEONETS
 These are usually formed by continues extrusion of parallel sets of
polymeric ribs at acute angels to each other. These net like configuration
are mostly useful in drainage application .
 These are look like geogrid but have substantially lower strength
 These are used for drainage applications because these are provide space
between two non woven textiles to minimize clogging and any possible
leakage from either of the membranes as a geocomposites
.
Three Dimensional Geo net

14. GEOCOMPOSITES
When geogrid/Geomembranes are combined with woven or non
woven Geotextile for specific application like drainage, erosion
control, bank embankment, etc. then they are designed as
GeoComposites.
 A typical example is bentonite geocomposite.
 It consists bentonite filled pores when this geotextile come in
contact with water the bentonite causes the pores to swell thereby
forming water tight sheets.
 Glass fibers are knitted on to the non woven geotextiles to enable
better use in highway applications.
Geo composite is made by laminating
a nonwoven geo textile

15. GEOMAT
It is a polymeric structure in the form of manufactured sheet
These are used for erosion control and soil reinforcement like in
running canals

16. GEOCELL
 It is a polymeric cellular structure consisting of a regular open
network of connected stripes linked by extrusion , adhesion or by
other methods.
 These are used as embankment geo textile which have high tensile
strength to prevent bank from the cracks .The rigidity of these
textile ensure the even distribution of force exhibited by water.
The Geocell is soil infill.
protection of outer cell by topsoil.

17. Biomat and Bionet
 These are permeable , natural and therefore biodegradable
polymeric material in the form of the manufactured sheet. Biomat
consists of fiber such as jute , coir, sisal, straw, are kept together
by one or two layers of synthetic or natural meshes and bionet
consist of a regular network of knotted or interlaced yarns whose
openings are lager than the constituents.
 Jute are used for moisture holding capacity of soil these are
degrade into the soil and reduce the velocity of flow of water and
hold the fertile soil at place.

18. APPLICATION OF GEOTEXTILE
 Separation
 Filtration
 Drainage
 River bank protection
 Coastal protection
 Reservoirs and lakes
 Concrete mattresses
 Reclaimed lands
 Embankment
 Railway/Roadway
 Landfills
 Soil erosion controls

19. APPLICATIONS OF GEOTEXTILE AS SEPARATOR

20. ROADWAY CONSTRUCTION
Woven Geotextile - Separator (Thane,
Mumbai)

21. LANDFILL
•Lightweight Foam fill on soft or sensitive soils
•It also used for forest-sensitive soil

22. LAND RECLAIMATION
geotextile

23. RAILWAY CONSTRUCTION

24. EMBANKMENT
 .

25. SHORE PROTECTION
geotube
During High Tide

26. SLOPE SOIL STABLIZATION
• Reduces erosion from rainfall impact
• Holds soil in place
• Absorb and hold moisture on soil surface
• Stabilize soil until vegetation is established
Before After

27. RIVER BANK PROTECTION
 It is used to retain the earth structure or retain the
structural integrity
 Reduces the lateral movement of soil particles.

28. CANAL BANK PROTECTION

29. PAVEMENT EDGE DRAINAGE

30. RETAINING WALL
 These withstand the effect of earthquakes better than conventional
rigid concrete walls.
 Reinforcing material should have high tensile strength, stiffness,
pullout and sliding resistance, durability.

31. ROCK FALL PROTECTION
 Highway and rail roads near rocks ,slopes are needed
the rock fall protection geo grid textile are used for
that purpose

32. REFERENCES
 Textile progress , September 2010 , volume 42 , no.3 ,
page 181-189
 Asian Textile Journal , September 2006 , volume 15 ,
no.7-9 , page 89-94
 Asian Textile Journal , February 2006 , volume 15 ,
no.3-3 , page 39
 Asian Textile Journal , February 2004 , volume 13 ,
no.1-4 , page 68-71
 Asian Textile Journal , September 2005 , page 88-93
 Indian journal of fiber and textile ressearch,1997
December
 Non Woven And Geo textile, January 1988

33. THANK YOU