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GEOSYNTHETICS IN PAVEMENT DESIGN
INTRODUCTION
 Pavements are civil engineering structures used for the purpose of operating wheeled vehicles safely and economically.
 The development of geosynthetics in the past three decades has provided the strategies for enhancing the overall performance of the paved roadways.
 Commonly a paved road becomes a candidate for maintenance when its surface shows significant cracks and pot holes.
GEOSYNTHETICS
 Geosynthetics is defined as “a planar product manufactured from polymeric material used with soil, rock, earth, or other geotechnical engineering related material”.
 Geosynthetic usage has steadily increased in both public and private construction projects.
 Geosynthetics is likely to increase in the future with stricter environmental regulations enforcement.
GEOSYNTHETICS
PRODUCTS OF GEOSYNTHETICS
 Geotextiles
 Geogrids
 Geocells
 Geonets
 Geomembranes
 Geocomposites
PROPERTIES OF GEOSYNTHETICS
 Thickness
 Tensile strength
 Tear strength
 Apparent opening size
 Puncture resistance
 Permittivity
 Transmissivity
 Ultraviolet resistance
GEOSYNTHETICS IN PAVEMENT
 The primary purpose of incorporating the use of geosynthetics in the pavement design process is to reduce reflective cracking
 Geosynthetics resist moisture intrusion into the underlying pavement structure, stabilize roadways and their edges.
 It improve road quality, particularly when roads were built on unstable soil.
 GEOSYNTHETICS IN PAVEMENT
 METHODS OF INSTALLATION
 POST CONSTRUCTION
FUNCTIONS
SEPARATION
 Geosynthetics is sandwiched between aggregate base course and subgrade material.
 It prevents mixing of the two layers, aggregate loss and pumping.
FILTRATION
 Geosynthetic acts as a filter by preventing material from washing out while allowing the water to flow through.
 Allowing an increase in subgrade strength.
DRAINAGE
 Drainage applications refer to situations where the water flows within the plane of the geosynthetic product .
 Prevents water logging in the pavement structure.
REINFORCEMENT
 It helps in maintaining the pavement integrity and uniformity.
 It reduces the differential settlement in roadways.
ADVANTAGES
 Reduces the intensity of stress on the subgrade.
 Prevents the base aggregate from penetrating into the subgrade.
 Prevents subgrade fines from pumping.
 Reduces the thickness of aggregate required to stabilize the subgrade.
 Reduces the differential settlement of the roadway.
 Reduces maintenance and extending the life of the pavement.
CONCLUSION
 Geosynthetics reinforce the structural section through: lateral restraint and tensile membrane support.
 The addition of a geosynthetic to a structural section increases the friction between the aggregate layer and the geosynthetic.
 Geosynthetics increase the overall bearing capacity of the pavement.
 The filtration-drainage function is vital to the performance of geosynthetics in road construction as any pore water pressure developed in the subgrade must be dissipated.

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Please send the abstract for geosynthetics in pavement design

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Mukesh Gajanan Raibole. I am Student of Civil Engineerin in P.R.Patil college of Engineering.