Effectiveness of Geotextiles/Geogrids in Roadway Construction; Determine a Granular Equivalent (GE) Factor

  • Two crewmembers walking on synthetic geogrid material, over an aggregate subgrade.
  • Truck adding geogrid between pavement layers.

Status:  Complete
Report Date:  12/14/2021


Geogrid, a synthetic material with a triangular or square pattern, can be inserted between the layers of asphalt pavement during construction to increase the strength and durability of the finished road. After rigorously testing geogrid materials, researchers provided objective data on geogrids’ short- and long-term performance and demonstrated that the material’s upfront cost may be worthwhile given the benefits it provides over the life of the pavement.

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