This document provides an introduction to geo-textiles and their major applications. It discusses how geo-textiles are used for separation of dissimilar materials, filtration and drainage, and reinforcement of weak soils. Some key applications mentioned are using geo-textiles between subgrade and stone base in roads, between old and new asphalt layers, beneath stone base for roads and airfields, and to reinforce embankments.

1. Introduction to Geo-textile

7. Bituminious Courses
Aggregate Bases
Geotextile Layer
Aggregate Drainage Layer
Subgrade
Filtration and Drainage

8. Bituminious
Courses
Aggregate
Bases
Geotextile Layer
Subgrade
Designed
Thickness

10. New Overlay
Reflective Crack without
Paving Fabric
Old Pavement
Base Course
Pavement
Crack
with
Paving
Fabric
Sealing Function

11. Major Applications of Geotextiles
Separation of Dissimilar Materials
 Between subgrade and stone base in paved roads and
airfields
 Between landfills and stone base courses
 Between geomembranes and soil drainage layers
 Between foundation and embankment soils for surcharge
loads
 Between foundation and embankment soils for roadway
fills
 Between foundation and encapsulated soil layers
 Between foundation soils and rigid retaining walls
 Between slopes and downstream stability berms
 Beneath precast blocks and panels for aesthetic paving e.g.
hardscaping

12. Major Applications of Geotextiles
Separation of Dissimilar materials
 Between drainage layers in poorly graded filter blankets
 Between old and new asphalt layers
Reinforcement of Weak Soils and Other Materials
 To reinforce embankments
 To aid in construction of steep slopes
 As basal reinforcement over soft soils
 To bridge over cracked or jointed rock
 To create more stable side slopes due to high frictional
resistance

13. Major Applications of Geotextiles
Filtration (Cross-Plane Flow)
 Beneath stone base for paved roads and airfields
 Around crushed stone surrounding under drains
 Around perforated under drain pipe
 As a flexible form for restoring scoured bridge pier
bearing capacity
 Between backfill soil and weep holes in retaining walls
 Between backfill soil and gabions
 As a filter beneath precast blocks

14. Major Applications of Geotextiles
Drainage (In-Plane Flow)
 As a drain behind a retaining wall
 As a drain at the base of retaining wall
 As a replacement for sand or wick drains