Due to the traffic on the Memmelsdorf Main Street near Bayreuth in Germany, between 2009 – 2011, it was necessary to repair the street in 2011. This project involved the complete rehabilitation of a 400-year-old road.
The geogrid ADFORS GlasGrid GG100 was used for the prevention against road cracks for the first time in Germany. The contractor has made the manual installation of
the grid under the asphalt overlayer.
GlasGrid GG100 product details
GlasGrid® GG100 – GlasGrid GG is a high-tensile fiberglass grid with an especially high mesh stiffness due to the consistent impregnation of each glass filament with our patented polymer coating in order to reach an effective bonding between asphalt
layers. A unique feature is the pressure sensitive adhesive backing of the grid, which ensures a quick and efficient installation and provides a good bond with the surface. GlasGrid GG can be installed directly on an old asphalt surface or on a leveling course. For the application on a concrete pavement, the installation of a levelling
course is necessary. Tensile strength: 100 x 100 kN/m
Project details and follow up
During the project, deeply damaged existing asphalt surface was milled to depth of six
cm. After that the 2cm of leveling course was applied and the self-adhesive geogrid was installed on that. Tack coat spraying ensued and finally 4cm of asphalt overlayer.
In June 2017, we went for visual check after six years of the rehabilitated road facing traffic. We weren’t surprised by the result. No cracks were discovered on the road
surface being reinforced by self-adhesive geogrid. On the other side, we checked structural defects and cracks on the area without the reinforcement grid.
Conclusion
The costs for the geogrid reinforcement of the asphalt increase the complete repair price up to 10%. Based on the GlasGrid functionality we can calculate, with minimum, a two-times-longer pavement life in comparison with non-reinforced asphalt layer.
GlasGrid typically provides a 50% reduction in future investment cost (e.g. maintenance, rehabilitation and use costs) over the life of an average road.
