Building Materials, Third Edition

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1. They can be good replacement for scarce and costly conventional construction materials
   like cement and steel for several types of applications.


2. They may be very useful, or perhaps the only alternative, at some of the poor site
   conditions.


3. They can be used and installed rapidly and have proved economical in mass usage.


4. Compared to other reinforcing materials (e.g. steel) they are better resistant to atmospheric
   weathering action.


5. They have added advantage of being useful in environment protection works.
   Geosynthetics have been classified as Geotextiles, Geogrids, Geomembranes and
   Geocomposites.

q
 are any permeable textile material used with foundation, soil, rock, earth or any
geotechnical engineering related material, as an integral part of man-made project, structure or
system. These are generally synthetic polymeric materials and consist of either woven or non-
woven fabrics and are generally used for separation, drainage, filtration and reinforcement.

q
 are relatively stiff materials with large apertures of sufficient size (10 to 50 mm) to
allow interlocking with surrounding soil, rock, earth or any other geotechnical material. They

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