Geosynthetics in roads and pavements

The Geosynthetic Solution 

A geosynthetic interlayer can be placed over the 

distressed pavement or within the overlay to 

create an overlay system. The geosynthetic 

interlayer contributes to the life of the overlay 

via stress relief and/or reinforcement and by 

providing a pavement moisture barrier.  

 

A stress relieving interlayer retards the 

development of reflective cracks by absorbing 

the stresses that arise from the damaged 

pavement.  It also waterproofs pavements that 

typically allow 30 to 60% of precipitation to 

infiltrate and weaken the road structure. 

 

Reinforcement occurs when an interlayer is able 

to contribute significant tensile strength to the 

overlay system. The reinforcement limits the 

movement of the cracked old pavement under 

traffic loads and thermal stress by holding the 

cracks together. 

 

The benefits of geosynthetic interlayers include: 

• 

Delaying the appearance of reflective cracks 

• 

Lengthening the useful life of the overlay 

• 

Added resistance to fatigue cracking 

• 

Saving up to 2 inches of overlay thickness 

 

Paving Fabric for Stress Absorption 

 

Paving Grid for Overlay Reinforcement 

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                                                      GEOSYNTHETICS IN ROADS AND PAVEMENTS:                                                       19 

Subgrade Separation and Stabilization, Base Reinforcement, Overlay Stress Absorption and Reinforcement 

For more information please contact the Geosynthetic Materials Association at www.gmanow.com.