Inline Pave Train For Paving The Surface Course
Construction companies are hired to rehabilitate existing roads much more frequently than to build new ones.
In addition to the conventional process of milling off the surface and replacing the asphalt pavement, two others exist that are gaining ground worldwide: paving thin overlay on spray seal and the “hot on hot” paving of compact asphalt pavements.
The company has now combined these two innovations into one. The solution emerged with and for Rask Brandenburg GmbH, a customer that has specialized extensively in modern methods of rehabilitation.
The machines behind these modern methods of road rehabilitation are the SUPER 1800-3i SprayJet paver (for thin overlay) and the Vögele InLine Pave train (for compact asphalt pavements).
The latter comprises a MT 3000-2i Offset PowerFeeder, a SUPER 2100-3i IP for placing binder course and another paver for the surface course.
The SUPER 1800-3i SprayJet had already clocked 600 operating hours, all of them spent on spray paver jobs, i.e. “hot on hot” jobs using InLine Pave technology.
In the InLine Pave process, the binder and surface courses are paved “hot on hot” in a single pass.
A Vögele MT 3000-2i Offset PowerFeeder with automatic distance control ensures a continuous supply of material. The paver operators can therefore concentrate entirely on paving.
The central technological component of the InLine Pave process is the SUPER 2100-3i IP for placing binder course.
Apart from the innovations of the latest “Dash 3” paver generation, this advanced machine has an entirely redesigned transfer module whose heated conveyor system has been extended by 1m.
It transfers the mix for the surface course to the downstream paver. At a defined point, the new transfer module can easily be removed, a feature that boosts the machine’s capacity utilization.
Equipped with an AB 600 TP2 Plus Extending Screed, the SUPER 2100-3i IP places such a highly compacted binder course that the surface course paver can travel over it without prior rolling.
This is made possible by another core innovation: high compaction technology with Vögele’s unique pulsed-flow hydraulics. In this step, the asphalt is precompacted during paving by a tamper and two pressure bars.
For Rask Brandenburg, Vögele adapted the technology on the SUPER 1800-3i SprayJet in such a way that the machine can take over the job of paving the surface course in the InLine Pave train.
The machine operates here in the conventional manner, i.e. not in spray mode. This is because the “hot on hot” method achieves a perfect bond between layers and strong interlocking, even without spraying bitumen emulsion.
Machine technology passes acid test in Berlin
After the surface course is paved (by the SUPER 1800-3i SprayJet in the case of Rask), rollers are used as usual to achieve final compaction.
A demonstration on the A 113 motorway in Berlin proved just how well the high-tech machine systems from Vögele work together: the paving train rehabilitated several sections totalling 2 km in length, which were opened to traffic on schedule at the end of the summer school holidays