If only the top layer of a road is damaged, you don’t have to replace the entire road surface. A particularly cost-effective and environmentally friendly alternative is the process of “paving thin overlay hot onto a sprayed seal.”
A Streamlined Solution
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Paving thin layers hot is perfect for roads in need of rehabilitation
This makes it possible to significantly improve the surface properties of a deteriorating road, such as grip, evenness, and noise reduction, over a longer period of time.
First, cold milling machines with fine milling drums are used to remove surface deformations and create an even, slightly roughened road surface.
“Dynamic compaction with HAMM
oscillation rollers is ideal to prevent
damage to the underlying cold layer.”
Spray Paver: Perfect for this Job
This surface texture has the ideal properties to ensure an excellent bond with the thin layer of asphalt to be applied. The sub-base must be thoroughly cleaned before further processing. A paver with a built-in spray module is the preferred choice for paving thin layers hot. It automatically applies a tack coat of polymer-modified bitumen emulsion to seal the base. At the same time, it paves a thin asphalt surface layer just 1.2 to 2.0 cm thick.
Compaction is a major challenge when paving thin layers hot, as it requires the layers to be compacted uniformly but without causing surface unevenness. Dynamic compaction with oscillation is ideal to prevent damage to the underlying cold layer during compaction. Static compaction is another alternative, but should be carried out without vibration.