ASPHALT REINFORCEMENT AND EFFECTS AFTER 16 YEARS SINCE INSTALLATION IN BELGRADE
Abstract
The application of polyester geogrids during pavement rehabilitation represents a well-known solution proven through decades of practice worldwide. In such design solutions, the geogrid is used as asphalt reinforcement to delay the reflection of cracks from old flexible, semi-rigid or rigid layers of pavement structure into new asphalt layers. In this way, the durability of new asphalt layers is extended by up to 3 times, which brings significant direct and indirect economic and ecological benefits.
The exceptional impact of PET geogrid, with tensile strength of 50kN/m, very thin non-woven PP geotextile and coating with high bitumen content, will be presented through an example of its application on a part of the former highwaythrough Belgrade, the section in front of Belgrade Arena. The pavement rehabilitation on this section was carried out in the summer of 2010, and its condition after almost 16 years of use under heavy traffic load is still very good. For 13 years of use, this section functioned, until October 2023, as part of the E 75 highway, while it now represents a city thoroughfare. The success of PET geogrid application on this section, expressed through the longevity of the rehabilitation carried out 16 years ago, is even more significant when considering the condition of the section at that time, caused by cracks that occurred in the cement stabilization layer.
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