Stabilizing Unpaved Roadway Structures

It’s estimated that half of all roads in the United States, and an even higher percentage of roads throughout the world, are unpaved. Many serve as heavy-duty access and haul roads for applications ranging from mining and logging operations to wind farms and landfills.

Weak subgrades pose the greatest challenge to these roads. A weak subgrade subjected to continuous heavy traffic can quickly deform, causing the road surface to rut, pothole, “washboard” and ultimately deteriorate beyond use. 

TriAx® geogrid and the use thereof are protected by U.S. Patent No. 7,001,112.

With increasing aggregate prices, tighter construction budgets and heavier wheel loads, lower cost alternatives to traditional methods of gravel road construction have become more important. One cost-effective, proven alternative has successfully stabilized thousands of miles of gravel-surfaced roads around the world: Tensar® TriAx® Geogrids.

Tensar TriAx Geogrids are designed to reduce stresses applied to weak subgrades. Geogrid and aggregate interlock to create a mechanically stabilized layer (MSL) that distributes loads evenly, increasing bearing capacity and improving long-term performance. In addition, TriAx Geogrids provide effective separation and filtration properties when properly graded aggregate fill is used in the MSL.

Stabilizing Unpaved Roadway Structures

Geogrid and aggregate interlock to create a mechanically stabilized layer (MSL) that distributes loads evenly, increasing bearing capacity and improving long-term performance. 

Tensar TriAx Geogrids improve the performance of gravel-surfaced roads by:

  • Reducing aggregate requirements up to 60%
  • Accelerating gravel road construction
  • Reducing labor and equipment needs
  • Maintaining road surface quality
  • Reducing the frequency of surface maintenance
  • Eliminating the need for costly overexcavation and disposal of poor quality soil
  • Eliminating challenges associated with chemical stabilization
  • Minimizing disturbance to the terrain and surrounding area

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