Paved Roads and Parking Areas

top_pavedroads

 

Paved Roads and Parking Areas

 

bx_geogridpicIn flexible pavement structures, the unbound aggregate base acts as a “transition layer” between the asphaltic material (that normally accounts for most of the road’s structural capacity) and the underlying subgrade. In simple terms, it acts as the road’s foundation. Under normal circumstances, the stiffness of the aggregate layer diminishes with time leading to increased dynamic deflections in the asphalt and eventually the development of fatigue cracking and other distresses.

When a geogrid is included within or at the bottom of the aggregate base, the coarser particles partially penetrate through the geogrid’s apertures. The result is permanent aggregate confinement that leads to reduced dynamic stresses being generated in the overlying asphalt. The designer then has the option to increase the design life for a particular pavement section, reduce the thickness of the section for the required trafficking capacity or combine both these options.

Scope

  • Low-volume “farm to market” roads
  • Car parks
  • Residential developments
  • Conventional highways

Benefits

  • Reduce initial costs by 10 to 15%
  • Extend life of pavement structure by 2 to 5 times
  • Develop cost-neutral road solutions with “free” life extension