The Rockster-technology: Perfect for Asphalt-Recycling

Broken asphalt recycling is profitable and it also protects the environment. Recent machine tests conducted by recyclers showed that Rockster ‘s technology is ideal for recycling old asphalt.

A well-known Austrian asphalt mixing plant operator recently supplied Rockster with real value calculations which are definitely impressive. Even with addition of only 10 % recycled asphalt the ROI of a Rockster R900 Impact crusher with screen box RS86 and return belt RB75 would slightly more than six months. Where formulations allow, it is possible to add up to 25% of recycled asphalt as a cold addition. That scenario, the ROI theoretically could be less than 4 months. Their calculations also revealed the bitumen savings. When using 25% recycled asphalt, 1,200 tons of bitumen can be saved over the same period. The fact that this recycling process also helps to protect the environment, is undoubtedly an expedient side effect. More importantly, by recycling the broken asphalt, the companies can realize additional earnings and save landfill costs.

Why is Rockster such a good choice for Asphalt-Recycling?

  • Rockster’s 2-swing-beam system allows to independently adjust the swing-beams
  • Exact adjustment of the crushing gap to specify the final grain size and reach a simple modification of the grading curve
  • The oversized rotor diameter causes an increase of the impact power and a more efficient crushing process
  • The hydrostatic drive allows an infinite adjustment of the rotor speed (control of fines) and therefore an easily controlled screening curve

Another advantage of the hydrostatic drive is that unlike clutch or clutch-similar drives, no wear costs emerge. More importantly, the direction of rotation can be changed (especially important for the duplex system).

Most of these features are unique to Rockster and ensure excellent performance with the best final grain quality. It is therefore possible to achieve any desired screening curve by simple adjustments to the crusher. This fact plays an important role in the asphalt recycling industry because there are exact guidelines for the screening curve when using recycled material for the production of new asphalt.

Here are two examples of Rockster customers in Europe who specialize in recycled asphalt material and have had valuable success:

Trummer: Asphalt-Recycling specialist with impact crusher R1100 – Rockster-customer for about 6 years

Martin Trummer, CEO of Trummer Maschinenhandel & Aufbereitung GmbH in Styria, uses an impact crusher R1100 with screen box. He says: “For asphalt crushed to 0-32 mm I reach a performance of almost 200t / h with my impact crusher R1100, which is an extremely good value from experience with other crushers. I have been used the R1100 for 4 years now and it is still in top form. You can always see further development of Rockster’s products. We constantly notice technological progress, which I find remarkable. You can see that customer requests and suggestions for improvement from experiences in the field are implemented quickly.”

Current project is commissioned by a huge Austrian infrastructure company named Asfinag. They use about 15% of recycled asphalt for a new motorway near the city of Graz.

ARGE-Recycling: Asphalt-Recycling specialist with the impact crusher R900 – Rockster-customer for about 4 years

The ARGE Recycling (formerly Naegele-construction) from Vorarlberg uses a Rockster impact crusher R900 with screen box and return belt for processing RAP. Environmental awareness and resource conservation have a great significance in the company and thus they have specialized in the recycling of asphalt and construction debris. “The first argument for purchasing a Rockster crushing plant was the outstanding performance,” says operations manager Simon Nicolussi. “With the combination of the screen box and return belt, we can produce high quality final grain at 0 % oversize, which can be sold very well. The compact transport measurements of the R900 was another important factor, as we do not only crush at our company site, but also at our customer’s places. Also the customer service of Rockster has convinced us from the beginning. We felt that we were being served by a competent and reliable team.”

For more information about Rockster Recyclers, visit the company website at:

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