Renovation of heavily cracked asphalt surfacing

Situation

As part of repair works, the heavily cracked asphalt surface of Techelweg and Penkenstraße in Schiefling am See was to be rehabilitated. The aim was to find a cost-effective rehabilitation system that would also offer a long service life. It was necessary to prevent the existing cracks from penetrating directly through the new surface layer, thereby extending the intervals between rehabilitation works.

Solution

Following a detailed assessment by the Carinthian Provincial Government and the Building Department of the municipality of Schiefling, it was decided to carry out the refurbishment using an asphalt reinforcement mesh. A profiled layer with a thickness of approx. 3–4 cm was applied to the existing, heavily cracked asphalt layer. This was sprayed on with approx. 0.7 kg/m² of bitumen emulsion HB 60K (U 60K). Once the sprayed emulsion had ‘set’, the reinforcement mesh was laid in accordance with the installation instructions. To complete the work, a 5 cm thick layer of asphalt was laid.

Advantages

Practical experience confirms that the use of asphalt reinforcement mesh extends the maintenance intervals many times over.