JOB REPORT

A new surface paves the way.

Replacing the pavement on a motorway

Pavement irregularities and the risk of aquaplaning were common sights on the German A9 motorway close to the town of Nuremberg. Extreme loads on Germany's south-east link had led to wheel ruts and poor skid resistance. To repair these damages, the surface course was replaced at a depth of 4 cm. The first part of the operation was carried out by a W 2100 cold milling machine from Wirtgen. Powered by just under 500 kW, the machine removed the pavement in 2.10 m wide cuts.

Two Vögele road pavers placed exceptionally load-resistant stone mastic asphalt on top of the milled base, supported by an MT 1000-1 mobile feeder. Compaction by rolling was of particular significance, as the material is very resilient and therefore averse to compaction. Three tandem rollers of the DV series from Hamm smoothed and compacted the new, 4 cm thick pavement surface. Working in oscillation mode, they ensured fast increase in density and perfect surface texture.