In autumn 2019, a total of 52,000 m2 of concrete pavement (old concrete) was ground off the A8 motorway between the Dasing and Dachau/Fürstenfeldbruck junctions in order to improve the grip of the surface. The work was carried out by silco tec Umweltschutzsysteme GmbH, which was able to complete the entire grinding work within the specified construction time of just 6 weeks.
For this job, the PC4504CE Bump Grinder was used for the very first time in Germany. This is a self-propelled machine for surface treatment of asphalt and concrete, originally produced by the American TYROLIT subsidiary Diamond Products Ltd. In order to meet the legal requirements and directives of the European market, the American original was adapted in advance to the local requirements in close cooperation between TYROLIT and LISSMAC Maschinenbau GmbH.
The entire grinding work was carried out at night while the roadway was in operation, with some lanes temporarily being closed. During the cutting, the CE-certified PC4504CE then delivered an impressive performance: The 9 m long machine has a 127 cm wide blade shaft, which was specially equipped for the project with a total of 245 BGX-C3 PREMIUM diamond saw blades in TGD® Technology with a diameter of 485 mm. The result was an optimal grinding pattern with clean-cut edges. The slurry extraction system also worked flawlessly, which meant that the usual and time-consuming cleaning of the road surface using a sweeper was not necessary.
The special highlight, however, was the traverse speed, which achieved up to 14 m/min when the blade shaft was fully loaded and thus exceeded all expectations, despite the high strength of the concrete surface. As a result, silco tec Umweltschutzsysteme GmbH not only made extremely rapid progress, the project was actually completed even faster than originally planned.