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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 Table 1 Geotextile Requirements for Roadway Applications PROPERTY UNITREQUIREMNTS MODERATEHIGH Puncture Strength N Dynamic Puncturem Ultimate elongation%>50 Burst StrengthPa23 Grab StrengthN Permeabilitym/s>Soil Permeability Apparent Opening sizem<.00015
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19 Table 2 Paving Fabric Requirements PROPERTYUNITSREQUIREMENTS Grab StrengthN450 Mass per Unit area Kg/m Ultimate Elongation %`> 50 Melting point 0C0C150
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21 Table 3 Physical Requirements for Drainage Applications Property UnitHigh survivabilityModerate survivability Puncture Strength N Dynamic Puncture m Burst Strength Pa Elongation at break %60
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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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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 Khalid a Mecca and Eyad al Hasan,Geotextiles In Transportation Applications,,(July 8,2009) A Landowners guide to building forest access roads – geotextiles,,(July 8,2009) Geotextiles in road construction maintenance and erosion control,,(July 8,2009) Sudhir Mathur and U.K.Guru Vittal,CRRI,Use of Jute Geotextiles in Road Construction,,(July 8,2009) S.C.Rangwala,Highway Engineering,2nd En.,Charotar,Anand,