Vögele : German super pave passes the test

Voegele_paver

There are many firsts achieved by German construction equipment manufacturers and here is another – paving a 15.5-metre wide highway in a single pass.

The construction company Heijmans Oevermann used a Vögele Super 3000-2, the world’s biggest paver, supplied by WMH Werwie Maschinen-Handels, to reconstruct a 4.2km stretch of the A10 Berlin orbital motorway.

The German Federal Ministry of Transport had specified in the tender documents that jointless paving was required over the full road width of 15.5 metres.

Oevermann got the job but senior site manager Dirk Lohne admits: “The issue bothering the paving team from the outset was: can we achieve a homogeneous pavement quality over the full width of 15.5 metre?”

The answer was yes.

One of the challenges was to maintain a virtually constant temperature in the asphalt mix between the asphalt preparation plant and the screed while maintaining constant material supply.

Voegele Super 3000-2

The Super 3000-2, which is the flagship of Vögele’s product range, can theoretically lay 16-metre widths at a rate of 1,600 tonnes per hour to a thickness of up to 500mm. On the Berlin Ring, it was combined with a SB 300 Fixed-Width Screed in the TP1 version with tamper and one pressure bar for high compaction.

In the complete system comprising material feeder and paver, the Vögele PowerFeeder MT 3000-2i Offset that was used can stock up to 45 tonnes and transfer up to 1,200 tonnes of mix per hour. In combination with the paver’s extra material hopper, this means that a 25-tonne feed lorry can be emptied in 60 seconds. It also means that the Super 3000-2 is kept fed for non-stop paving.

Vögele German super pave

Laser sensors under the pivoting conveyor ensure that the distance between material feeder and paver remains constant. They prevent the feeder colliding with the paver and allow the operator to pay full attention to the transfer of mix.

The result was a homogeneous high-quality pavement over the full width of the roadway – as thermal imaging verified even before the paving process was complete. They showed the total thermal homogeneity of the asphalt over the full width of 15.5 metres, without any tendency to segregate.

According to Vögele, this job represents the beginning of a new chapter in the history of highway construction: it was the first time that binder and surface courses were paved over such a width. But in some respects, the rehabilitation of this stretch of the A10 can be considered a pilot project, Vögele says. The requirements specified here will become commonplace in future because new asphalt paving regulations came into force this year. A constant temperature of the asphalt and an uninterrupted paving process are two key issues for road builders. As a result, thermally insulated dump boxes are now mandatory when transporting asphalt by lorry, for simple insulated tippers cannot guarantee that the required temperature will be maintained. The asphalt must be at a uniformly high temperature, without cold areas in corners, bends or along the sides. A second new requirement concerns the use of material feeders when building or rehabilitating federal trunk roads. It applies to projects involving a continuous asphalt paved area of 18,000m² or more.

 Road paving Vögele Super 3000-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Steve Rhine

About Steve Rhine

Community Manager at MachineryZone USA - All latest construction news on MachineryZone Mag!