Commissioning of TBA 3000 in Bergamo

It is the first BENNINGHOVEN plant to produce asphalt in Italy: a TBA 3000 is improving productivity and flexibility for its owner, PMB s.p.a.

Italy // Bergamo

The city of Bergamo is known throughout Italy for its thriving industry, with the production of building materials as one of the most important fields. The latest innovation in this segment is a recently acquired asphalt mixing plant from BENNINGHOVEN. And it’s something of a sensation. The type TBA 3000 is the first ever that BENNINGHOVEN has delivered to Italy, with the market being dominated by local suppliers. So what made the difference? “Our machine pool comprises 20 WIRTGEN milling machines, VÖGELE pavers and HAMM rollers. That’s why we have so much confidence in the WIRTGEN GROUP. Once we had visited the BENNINGHOVEN headquarters and looked at the performance characteristics, we were fully convinced this was the right choice.“ This is how the partners of PMB s.p.a, Angelo Legrenzi, Mauro Bergamelli and Matteo Bergamelli, explain their investment in technology “made in Germany”.

First-class technology for high-grade asphalt

The transportable BENNINGHOVEN type TBA asphalt mixing plants are characterized by their modular design, a large performance range, the possibility of adding more than 70% of RAP material, high robustness and the wide range of options. These features make the acquisition of a type TBA 3000 plant a strategic decision for PMB s.p.a., since it allows the company to boost its productivity, gain flexibility with regard to new market requirements and significantly improve eco-friendliness.

Italy’s BENNINGHOVEN pioneers: the three managing directors of PMB s.p.a., Angelo Legrenzi, Mauro Bergamelli and Matteo Bergamelli

Three tonnes of asphalt every 45 seconds

The TBA 3000 of the Italian contractor PMB is equipped with a 3,000kg mixer and guarantees a mixing output of 240t/h. Plants of this type are typically designed to be extremely robust, allowing them to be installed even in earthquake zones and making them resistant to high wind loads. Even so, their modularity and the preinstalled cabling designed for rapid connection means that each TBA is easy to transport and install speedily at another location.

Rising demand for RC processing

Specializing in asphalt production, “Produzione Materiali Bituminosi” — or PMB s.p.a. for short — was founded in 1980 as a joint venture between three companies that had already been actively involved in this field since the 1950s. PMB operates two asphalt mixing plants in the immediate vicinity of the A4, one of the busiest motorways in Europe. The need to replace one of these plants was used as an opportunity to upgrade the technology for the future.

The TBA 3000 with multivariable feed delivers impressive asphalt quality even at an RAP material rate of 40%.

Highlights of the recycling process: Granulator and multivariable feed

Two central components are responsible for the high portion of RAP material that can be used: the upstream stationary granulator SBRG 2000 and the multivariable RC feed system. The innovative BENNINGHOVEN granulator crushes the reclaimed asphalt particularly gently, preserving the grain structure. In the asphalt mixing plant these RAP granules are delivered “cold” into the mixer by means of a multivariable feed system. The procedure is as follows: a space-saving elevator delivers the granules to the mixing tower. The defined feed quantity is delivered to the mixer in small quantities. This prevents shocks caused by steam expansion, thus protecting the plant and minimizing maintenance.

Modern BENNINGHOVEN bitumen tanks deliver additional boost to efficiency

As well as the recycling technologies, PMB attaches great importance to diversity: “We want to offer our customers the greatest possible range of asphalt grades. That’s why we opted for multiple bitumen tanks — not least because it enables us to store modified bitumen,” says Angelo Legrenzi of PMB. Here too, BENNINGHOVEN offer an innovative solution: in the tanks, the 160 — 180°C hot bitumen’s temperature is maintained electrically — and hence cost-efficiently — under constant movement by the BENNINGHOVEN mixing nozzle.