Applications of geotextiles

APPLICATION OF GEOTEXTILES

1. “APPLICATIONS OF GEOTEXTILES” 1

2. CONTENTS INTRODUCTION MATERIALS USED IN GEOTEXTILES PROPERTIES OF GEOTEXTILES TYPES OF GEOTEXTILES APPLICATION OF GEOTEXTILES ADVANTAGES AND DISADVANTAGES OF GEOTEXTILES CONCLUSION REFERENCES . 2

3. INTRODUCTION The geotextiles defines as a “Fabric or synthetic material placed between the soil and a pipe, gabion, or retaining wall (to enhance water movement and retard soil movement) and as a blanket to add reinforcement and separation” Permeable geosynthetics comprised solely of textiles, geotextiles are used with foundation, soil, rock or any other geosynthetical engineering related material as an integral part 3

4. MATERIALS USED IN GEOTEXTILES Geotextiles are made from polypropylene , polyester, polyethylene, polyamide (nylon ), polyvinylidene chloride, and fiberglass Polypropylene and polyester are most used Yarns are formed from fibers which have been bundled and twisted together , a process also referred as spinning 4

5. POLYTHYLENE POLYPROPYLENE AND NYLON POLYESTER 5

6. MECHANICAL PROPERTIES 6

7. WOVEN TYPE Based on their manufacture they can be sub divided into several categories These were the first to be developed from the synthetic fibers TYPES OF GEOTEXTILES WOVEN TYPE GEOTEXTILE 7

8. 8 From adopting techniques which are similar to weaving usual clothing textiles The majority of geotextiles are manufactured from polypropylene

9. NON-WOVEN TYPE Non-woven type can be manufactured from either stable fibers or continuous filament yarn The fibers can be bonded together by adopting thermal, chemical or mechanical technique These are manufactured through a process of mechanical interlocking or chemical or thermal bonding of fibers NON-WOVEN TYPE GEOTEXTILE 9

10. 10 The opening size of thermally loaded geotextiles are of about a thickness of 0.5-1mm Chemically loaded are of size of about 3mm And mechanically bonded are of size about 2-5mm

11. KNITTED TYPE Knitted types are manufactured using process which is adopted from the clothing textile industry namely that of knitting In this process interlocking a series of a loops of yarn together is made KNITTED TYPE GEOTEXTILE 11

12. APPLICATION Roadways, parking lots, and construction sites River canals & coastal works\ Filtration Drainage Reinforcement protection Separation Railway work 12

13. ROAD WORKS To allow rapid dewatering of the road bed the geotextiles need to preserve its permeability without losting its separating functions Its filtration characteristics must not be significantly altered by the mechanical loading 13 ROAD WORKS

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15. RIVER CANALS & COASTAL WORKS Geo textiles protect river banks from erosion due to currents or lapping When used in conjunction with natural or artificial enrockments, they act as a filter, for erosion prevention 15 RIVER CANAL

16. AGRICULTURE I t is used for mud control. For the improvement of muddy paths and trails those used by cattle or light traffic nonwoven fabrics are used and are folded by overlapping to include the pipe or a mass of grit 16 AGRICULTURE

17. FILTRATION These are an ideal interface for reverse filtration in the soil adjacent to the geotextile In all soils water allows fine particles to be moved Part of these will be halted and rest will pass into the drain FILTRATION 17

18. 18 Bituminious Courses Aggregate Bases Geotextile Layer Aggregate Drainage Layer Subgrade FILTRATION

19. DRAINAGE Geotextiles will efficiently collect superfluous water from structures It will collect rainwater or surplus water, from the soil and discharge it DRAINAGE 19

20. REINFORCEMENT Heavy geotextiles can be used to reinforce earth structures by means of fill materials Thanks to their high soil fabric friction coefficient and high tensile strength REINFORCEMENT 20

21. PROTECTION Geotextiles are an ideal protection from erosion of earth embankments by wave action, currents or repeated drawdown A layer of geotextiles can be placed so as to prevent leaching of materials They can even easily be placed under water PROTECTION 21

22. SEPARATION Geotextiles will prevent two soil layers of different particle sizes mixing with each other. In this geotextiles is most often to prevent the undesirable mixing of fill and natural soils or two different types of fills A geotextiles can be placed between a rail road subgrade and track ballast to prevent contamination And it will result in the strength loss of ballast by intrusion of the subgrade soil SEPARATION OF DIFFERENT PAVEMENT MATERIALS 22

23. 23 SEPARATION Bituminious Courses Aggregate Bases Geotextile Layer Subgrade

24. RAILWAY WORKS The development of the railway networks being greatly boosted by the present state of economy because of their profitability in view of increasing cost of energy and their reliability as a result of the punctuality of trains even in the adverse weather condition 24 RAILWAY WORK

25. ADVANTAGES AND DISADVANTAGES ADVANTAGES They are lighter in weight, this makes for easier handling and laying on site Transport and labour costs are less in real terms Knitted geotextiles have high tear strength 25

26. DISADVANTAGES Installation is critical and requires experienced contractors These may delay seed germination, due to reduction in soil temperature Geotextiles have maximum flow rate limitations Not suitable for areas that have foot traffic 26

27. CONCLUSION Geotextiles are effective tools in the hands of civil engineer that have proved to solve a major geotechnical problems geotextiles offer a major solution for subgrade improvement and soil protection. The study using geotextiles for embankment protection shows that the geotextiles laid embankment’s perform good in terms of functional and structural evaluation The geotextiles appeared to be effective in preventing erosion, to retain moisture and to fecilitate stability of road pavement And also extensive awareness should be created among the people about the application of geotextiles 27

28. REFFERENCES Bhavesh joshi, Dr . R. P Arora. (2015)- pavement design by using geotextile . “ International journal of civil engineering and technology”(IJCIET) Truptimalapattnaik, binayakbidyasagar, biplabkesharisamal (2016)- application of geotextile in pavement . “International journal of engineering science and research technology” Saheem S and Tomy cyriac (2013)- performance evaluation of geotextiles as earth reinforcement in soil structures . “ American journal of engineering research” (AJER) M.Emin Kuttay and Ahemet H. Aydilk.(2005)- filtration performance of two-layer geotextile systems . “Geotechnical testing journal” volume.28.no.1. Dr.Bipin JAgarwal (2011)- geotextile application to civil engineering -overview. “National conference on recent trends in engineering and technology” 28

29. THANK YOU 29