Perfectly bonded layers withstand traffic loads

In a preliminary operation, surface deformations are removed by cold milling machines fitted with fine milling drums to create an even, slightly roughened road surface. The road texture produced by fine milling offers an ideal base which ensures an excellent bond with the thin pavement layer to be applied. A paver with integrated spray module is preferably used when paving the thin overlay. 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 course just 1.2 to 2.0 cm thick.

Rollers create an even road surface

Compaction is a big challenge when paving thin layers in hot application, as it requires the layers to be compacted uniformly but without causing irregularities in the surface. Dynamic compaction with oscillation is ideal, ensuring that the underlying cold layer is not damaged by compaction. Static compaction is also possible, but without vibration.

Economical use of material save costs

The small layer thickness of the new surface course helps to keep the costs of this method of rehabilitation fairly low. Paving thin layers in hot application uses 30 kg to 50 kg of asphalt mix per m² of the new surface course, which is up to 50% less when compared to conventional “mill and fill” measures. Because it helps to save natural resources, paving thin layers in hot application is also beneficial to the environment.