PAVEMENT REHABILITATION - KARTODROME

When the useful life of a Kartodromo pavement structure comes to an end, it is necessary to rehabilitate it, improving the performance and durability of the pavement when rehabilitation with geogrids is carried out.

The asphalt concrete used on tracks, and more specifically, on karting circuits, has certain grip and resistance characteristics. In fact, it should be emphasized that karts, due to their low weight, generate a very low vertical load (unlike, for example, trucks on a highway), and a very strong tangential load due to the grip of the tire on the road. surface and at high speeds in curves. This situation is critical for asphalt concrete if it is not sufficiently compacted, since its surface layer is literally torn by tires.

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The asphalt layers are losing resistance thanks to the repetition of loads, which generate tension and compression stresses both in the lower part and in the upper part of these, generating cracks through which water infiltrates, causing an accelerated deterioration of the asphalt layer. granular support substructure.

Pavement rehabilitation with geogrids

To rehabilitate the pavement, it is necessary to incorporate a geogrid, such as FORTGRID ASPHALT 140, in order to reinforce and control the reflection of possible discontinuities and cracks in the existing asphalt surface across the entire width of the pavement structure, as shown. shows in the following figure:

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geogrids FORTGRID ASPHALT They have been specially developed for the reinforcement of asphalt layers, providing high resistance to tension and cyclical loading over time that lead to a significant increase in resistance to reflective cracking, prolonging useful life and reducing maintenance costs. of the pavement.

geogrids FORTGRID  ASPHALT are biaxial geogrids made with the exclusive High Tenacity Polyester G5 Multifilament (PET) of GEOMATRIX, which is characterized by offering high tensile strength, low elongation, resistance to high temperatures, low elongation under sustained load (low creep) and high resistance to cyclic loading over time.

 

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The role of geogrids in pavement rehabilitation

Fortgrid Asphalt Geogrids

The multifilament fibers are coated with a high-performance bituminous copolymer that facilitates their adherence to asphalt paving and protects them from installation damage. Its opening size allows a high mechanical interaction with the aggregate, guaranteeing high shear resistance between the contact surfaces involved, assuring the structural bond condition between the layers.

geogrids FORTGRID ASPHALT are characterized in terms of the increase in the resistance to cracking of asphalt overlays through the efficiency factor of the geogrid (GEF), of the resistance to shear at the interface (percentage of open area) and of its resistance to cyclic load to permanent deformations (cyclic stress modulus), offering a realistic scenario with clear selection criteria.

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