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Contractors World International Vol 7 No 6

10

Germany

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 innova-

tions 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 com-

pact asphalt pavements).

The latter comprises aMT 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 auto-

matic 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 technol-

ogy 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 man-

ner, 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.

Joseph Vögele AG

Wor ldwide Panorama