A Review on the Performance of Geosynthetic Reinforced Asphalt Overlays

While there is noteworthy field validation of the advantages of geosynthetic-reinforced hot mix asphalt (HMA) overlays, their utilization has concentrated on limiting the implementation of fatigue cracking, reflective cracking, and permanent deformations. The application of geosynthetics in HMA overlays may also enhance the mechanical performance of controlling deformations and diminishing strains in the asphalt layers. In particular, geogrids in black-top overlays are also expected to create reinforcement mechanisms that add to the structural capacity for the pavement. Geogrid interlayer between the asphalt layers is a useful technique for the alleviation of reflective cracking and the advancement of fatigue life of asphalt structures. This paper aims to review the application of geosynthetics in asphalt pavements and their advantages. The observations demonstrate that the geogrid reinforcement enhances the service life of a flexible pavement by increasing the fatigue life and restricting reflective cracking.