Geosynthetics are man-made materials used with soil, rock, and earth in construction and engineering projects. They are made from polymeric materials and include geotextiles, geogrids, geomembranes, geonets, and more. Geosynthetics serve functions like separation, reinforcement, filtration, drainage, and as barriers. They have been used since the 1920s and have various applications like retaining walls, reinforced slopes, drainage systems, vertical drains, canals, and waste landfills.

1. Introduction of Geosynthetics
and its Characteristics

2. 1. Definition of Geosynthetics
Geosynthetics = Geo(earth) +
synthetics
a planar product, manufactured from
polymeric material used with soil,
rock, earth, or other geotechnical
engineering related material as an
integral part of a man-made project,
structure, or system; ASTM D4354,
D4759, D4873, D5617, D5818
Geotextiles  Geosynthetics

3. Organizations in Geosynthetics
International Geosynthetics Society
(IGS); with many national chapters, e.g.,
(KGSS)
Geosynthetics Materials Assoc. (GMA)
ASTM & ISO Standards Organizations
Geosynthetic Institute (GSI); incl. GRI

4. 2. History
 1926, South Carolina Highway Dept., USA
 for reinforcing unpaved roads
 1953, restoration of flood, Netherlands
 Nico ter Kuile & Sons (Netherlands)
 Nylon6 sand bag & woven
 1973, drain board
 for vertical drain
 1963, water barrier
 1980, Geotextiles

5. 3. Function of Geosyntehtics
Separation
separating dissimilar materials so that
both can function as originally intended
Reinforcement
providing tensile strength to soils or other materials
Filtration
allowing cross-plane flow,
retaining upstream particles
Drainage
providing in-plane flow,
yet retaining upstream particles
Barrier
preventing liquids, gases,
or solids from becoming fugitive

6. Reinforcement

7. 4. Types of Geosynthetics
 Geotextiles
 Geogrids
 Geomembranes
 Geocynthetic clay liners
 Geonets
 Geopipes
 Geotextile tubes
 Erosion Control Mats
 Geocomposite
 Geocells
 Prefabricated drain board

12. GEOPIPES

14. Drain geocomposite

15. Geotextile Tube & Container

16. GEOCELLS

17. Plastic Drain Board(PDB)

18. 5. Applications

19. Retaining wall

20. Reinforced slope

21. drainage geocomposite
drainage geocomposite
drainage geocomposite
Drainage

22. Vertical drain

23. Canals

24. Revetment

26. Waste landfills