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4. GEOTEXTILE  Geotextile is defined as a permeable textile material used in contact with soil, rock, earth etc as an integral part of civil engineering project, structure or system  It may be of natural materials such as jute,coir,cotton etc.  Or of synthetic polymers such as polypropylene, polyamide, polyester,polyethylene 4

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17. 17 Table 1 Geotextile Requirements for Roadway Applications PROPERTY UNITREQUIREMNTS MODERATEHIGH Puncture Strength N400700 Dynamic Puncturem0.0180.012 Ultimate elongation%>50 Burst StrengthPa23 Grab StrengthN700800 Permeabilitym/s>Soil Permeability Apparent Opening sizem<.00015

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19. 19 Table 2 Paving Fabric Requirements PROPERTYUNITSREQUIREMENTS Grab StrengthN450 Mass per Unit area Kg/m 2.140 Ultimate Elongation %`> 50 Melting point 0C0C150

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21. 21 Table 3 Physical Requirements for Drainage Applications Property UnitHigh survivabilityModerate survivability Puncture Strength N690420260 Dynamic Puncture m.014.018.022 Burst Strength Pa275760020682001275390 Elongation at break %60

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23.  GEOTEXTILES ARE AN EFFICIENT EFFECTIVE AND ECONOMIC METHOD OF SOLVING MOST OF THE GEOTECHNICAL PROBLEMS IN ROADS.  THE DESIGN ENGINEER SHOULD BE WELL AWARE OF THE POSSIBLE PROBLEMS AND SHOULD USE THIS RELATIVELY NEW TOOL FOR SOLVING THEM.  FOR THIS HE SHOULD UNDERSTAND PROPERTIES AND CAPABILITIES OF THE GEOTEXTILE MATIERIAL AT HAND. 23

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25. 6. REFERENCES B.C.Chattopadhyay and S.Chakravarty(2009),Containment of Sulfate Pollution in Soil by Natural Geotextile from Jute,Journal of matierials in civil engineering,no. 3,vol.21,pp 128-132 Khalid a Mecca and Eyad al Hasan,Geotextiles In Transportation Applications,,(July 8,2009)www.google.co.in A Landowners guide to building forest access roads – geotextiles,,(July 8,2009)www.google.co.in Geotextiles in road construction maintenance and erosion control,,(July 8,2009)www.google.co.in Sudhir Mathur and U.K.Guru Vittal,CRRI,Use of Jute Geotextiles in Road Construction,,(July 8,2009)www.google.co.in S.C.Rangwala,Highway Engineering,2nd En.,Charotar,Anand,2002 25