Rehabilitating a Stretch of the A 9 Motorway in Bavaria, Germany

Created: August 23, 2010

Two VÖGELE SUPER 1800-2 pavers with SprayJet module pave a thin overlay of noise-absorbing asphalt.

The ErgoPlus operating system "makes operating the SUPER 1800-2 with SprayJet Module child's play," said the screed operator.
The ErgoPlus operating system "makes operating the SUPER 1800-2 with SprayJet Module child's play," said the screed operator.
The SprayJet module prevents the emulsion from misting and soiling adjacent areas.
The SprayJet module prevents the emulsion from misting and soiling adjacent areas.
The two SUPER 1800-2 pavers with SprayJet Module work together on the A 9 Federal Motorway.
The two SUPER 1800-2 pavers with SprayJet Module work together on the A 9 Federal Motorway.

Use of noise-absorbing asphalt

The numerous backups on the A 9 were not the only reason for expanding this stretch of motorway. The motorway runs through a densely populated area and traffic noise was a nuisance to many of the local residents. That was why a special noise-absorbing asphalt was to be used for the surface course across the full width of the motorway.

The mix responsible for the sound damping effect is a special material for thin overlays known as DSH-V (0/5) with PmB 65 (70/100) polymer-modified bitumen. This material is characterized by a high content of double broken and double screened chippings and sand, which results in a sufficiently high voids content in the finished layer, allowing a share of the sound waves to be absorbed. In combination with the PmB 65 (currently: 45/80-50) binder, the DSH-V (0/5) material is able to withstanding the heaviest traffic loads.

The two SUPER 1800-2 with SprayJet Module applied emulsion (type C67) and paved asphalt in a single pass. The rate of spread for the emulsion was 800g/m2, thus ensuring reliable interlocking of layers.