The Challenge:
Place an even asphalt surface without joints on Germany's B 56 federal highway without interrupting the supply of mix to the paver.
The Players:
A. Frauenrath Bauunternehmen GmbH
Lambert Schlun GmbH & Co. KG
The Process:
Contractor A. Frauenrath Bauunternehmen GmbH from Heinsberg had won the contract for construction of this 2-mile-long new stretch of the B 56 federal highway in a consortium with Lambert Schlun GmbH & Co. KG from nearby Gangelt. Base and binder courses were paved by a Vogele SUPER 1600-2 and SUPER 1603-2.
"Hot to hot" paving was originally specified for the wearing course, but Frauenrath's site planning engineers had other ideas. "We had heard of the SUPER 3000-2's advantages and were sure that with this machine we could pave a perfect wearing course without joints," says Toni Oellers, technical manager Service & Logistcs. The idea convinced the highway authority engineers, Lower Rhine Regional Office, and they agreed to the change.
The paver was complemented by a MT 1000 Mobile Feeder. Since the feeder stocks a sufficient quantity of mix, paving can continue for several hours without a single break even when feed lorries only deliver fresh material intermittently. The mechanical separation between paver and feeder also ensures that the mix is transferred smoothly.
"This job site is served by 24 feed lorries with a turnaround time of one hour, so they return fairly quickly," said Jürgen Thebrath, Frauenrath's Site Manger for asphalt. "In addition, we have signed a contractual agreement with the asphalt mixing plant ensuring that the asphalt is delivered without a break."
For this project, the SB 300-2 Fixed-Width Screed, specially developed for the SUPER 3000-2, was built up with bolt-on extensions from the basic width of 9.84 ft. to a pave width of 36.09 ft. Hydraulic extensions on the right and left provided the flexibility needed to place the road's wearing course in widths between 38.06 and 41.01 ft.
The SUPER 3000-2 was in action in Selfkant for two days. It advanced continuously at a rate of almost 13.12 ft./min.
