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1
 Introduction
 Types of geotextiles
 Placing of geotextiles in pavement
 Functions and applications of geotextiles in
...
 Geotextiles are polymer fabrics used in the
construction of roads, drains, harbour works,
breakwaters, and for land recl...
 Geotextiles are usually made from polymers such as
polyester or polypropylene.
 Further prepared in 3 different categor...
 These were the first to be developed from the
synthetic fibers.
 Manufactured with a process of weaving narrow strip
of...
Fig1. woven type geotextile
6
 Can be made from either continuous filament
or staple fibres, these are continuously
extruded and spun, placed on a movi...
4. combination bonding
 Thicker than woven type geotextiles.
 These are flat porous sheets.
Fig.-non-woven geotextile
8
 Manufacturing process adopted from clothing
textiles industry, and that process is called knitting.
 Interlocking a ser...
 Between aggregate layer and natural subgrade
layer.
 Mechanically or with hand.
 It will be rolled around a pipe, just...
Fig.3 placing of geotextile mechanically
11
Fig.-placed geotextile
12
 These are the main functions performed by
geotextile in pavement-
1. Separation
2. Filtration
3. Reinforcement
4. Draina...
 These are main layer in a section of pavement-
1.Subbase/Subgrade layer
2.Base/Aggregate layer
3.Surface layer
 Geotext...
 Prevent the mixing of two dissimilar materials.
 Greater density of provided material can be
achieved.
 Releases pore ...
Fig.-geotextile as separater
layer
16
 Oldest and most widely known function.
 The geotextile is placed in contact with and
down gradient of soil to be draine...
Fig.-geotextile as filtration layer
18
 Geotextile as reinforcement means a
significance increase in pavement-strength.
 Mechanism-It is the lateral restrain t...
 Requirement-
Geotextile should posses enough strength.
 Knitted type of geotextile is preferred.
Fig.-geotextile perfor...
 Geotextile acts as conduit for the movement of liquid
in the plane of geotextiles.
 Thick non-woven type geotextiles ar...
 The geotextile protects soil surfaces from the
tractive forces of moving water or wind and
rainfall erosion.
22
Fig.-geotextile controlling errosion
23
 Geotextiles are very important part of pavement
construction regarding its strength, durability, and
working performance...
 1. Sharma, Kanaungo, Khatri.,2014, “Application of
Geotextiles in Pavement Drainage Systems,
International Journal of Ci...
ANY QUESTION?
PLEASE ASK…
26
THANK YOU
27
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Geotextiles in pavement

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this will help you to find what is geotextiles,its classification and functions in pavement

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Geotextiles in pavement

  1. 1. 1
  2. 2.  Introduction  Types of geotextiles  Placing of geotextiles in pavement  Functions and applications of geotextiles in pavement  References 2
  3. 3.  Geotextiles are polymer fabrics used in the construction of roads, drains, harbour works, breakwaters, and for land reclamation and many other civil engineering purposes.  Used with geotech. eng. related materials as an integral part of human made structures. 3
  4. 4.  Geotextiles are usually made from polymers such as polyester or polypropylene.  Further prepared in 3 different categories- 1.Woven type 2.Non-woven type 3.Knitted type 4
  5. 5.  These were the first to be developed from the synthetic fibers.  Manufactured with a process of weaving narrow strip of film together to form one large piece. Weaving is done by interlocking perpendicular threads.  Can be used in roadways as it has higher load capacity.  Does not have good drainage characteristics. 5
  6. 6. Fig1. woven type geotextile 6
  7. 7.  Can be made from either continuous filament or staple fibres, these are continuously extruded and spun, placed on a moving belt, to form mat, which is then bonded by using any of these processes- 1. needle-punching 2. heat bonding 3. resin bonding 7
  8. 8. 4. combination bonding  Thicker than woven type geotextiles.  These are flat porous sheets. Fig.-non-woven geotextile 8
  9. 9.  Manufacturing process adopted from clothing textiles industry, and that process is called knitting.  Interlocking a series of yarns together is made in this process. Fig.-knitted type geotextile 9
  10. 10.  Between aggregate layer and natural subgrade layer.  Mechanically or with hand.  It will be rolled around a pipe, just unroll it. 10
  11. 11. Fig.3 placing of geotextile mechanically 11
  12. 12. Fig.-placed geotextile 12
  13. 13.  These are the main functions performed by geotextile in pavement- 1. Separation 2. Filtration 3. Reinforcement 4. Drainage 5. Erosion control 13
  14. 14.  These are main layer in a section of pavement- 1.Subbase/Subgrade layer 2.Base/Aggregate layer 3.Surface layer  Geotextile is placed between subgrade and base layer-as a separater, so that they can perform effectively. 14
  15. 15.  Prevent the mixing of two dissimilar materials.  Greater density of provided material can be achieved.  Releases pore water pressure, that results in consolidation of subgrade.  Life of pavement increases. 15
  16. 16. Fig.-geotextile as separater layer 16
  17. 17.  Oldest and most widely known function.  The geotextile is placed in contact with and down gradient of soil to be drained.  Allows water to pass and retains soil particals.  Permeability and long time clogging are the properties of geotextiles, which are considered in this function. 17
  18. 18. Fig.-geotextile as filtration layer 18
  19. 19.  Geotextile as reinforcement means a significance increase in pavement-strength.  Mechanism-It is the lateral restrain through friction between soil and geotextile.  Geotextile resist the tensile force developed.  Geo-grids are in common use in US instead of Geotextiles. 19
  20. 20.  Requirement- Geotextile should posses enough strength.  Knitted type of geotextile is preferred. Fig.-geotextile performing like reinforcement in pavement 20
  21. 21.  Geotextile acts as conduit for the movement of liquid in the plane of geotextiles.  Thick non-woven type geotextiles are commonly used for this function. 21
  22. 22.  The geotextile protects soil surfaces from the tractive forces of moving water or wind and rainfall erosion. 22
  23. 23. Fig.-geotextile controlling errosion 23
  24. 24.  Geotextiles are very important part of pavement construction regarding its strength, durability, and working performance.  Very useful in case of silt and clay. 24
  25. 25.  1. Sharma, Kanaungo, Khatri.,2014, “Application of Geotextiles in Pavement Drainage Systems, International Journal of Civil Engineering Research.volume” 5(4),385-390  2. Chair, Flintsch, Trani., “Effectivness of using geotextitles in flexible pavements: life-cycle cost analysis” Feb 27, 2006.  3. Guyer, Pe, Ra. 2009, “An introduction to geotextile in pavement and drainage application”, C02-019 25
  26. 26. ANY QUESTION? PLEASE ASK… 26
  27. 27. THANK YOU 27

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