RM100 ensures mobility and performance in building forestry tracks
Kostmann GmbH, based in Carinthia's Lavant Valley, is a group of companies that are steeped in tradition and stand for premium quality and innovation in the fields of building and construction, the production of raw materials and processing. High-quality products are produced in numerous excavation sites and quarries both home and abroad for the concrete, asphalt and construction industries. When it comes the building or rebuilding of forestry tracks, the company relies on the mobility and cost-efficiency of the compact RUBBLE MASTER Compact Recyclers from Linz.
Plant and machinery manager Martin Kaimbacher contacted RUBBLE MASTER again at the end of September regarding a forestry track project in Carinthia. The forestry track in question is 1,500 m above sea level and the job was to stabilise a 20 km stretch of the track with crushed rock. The gneiss rock in the area was used for this purpose. "When you're 1,500 m above sea level it isn't easy to find a high-performance crusher that can actually get to the job site," says Martin Kaimbacher. "The journey would have been impossible with our 65 tonne crusher.
Thanks to the RUBBLE MASTER RM100 weighing only 28 tonnes, it can be taken to the job site easily on a 4-axle low-bed trailer, without any special permits," says the experienced plant manager, who was already familiar with the RM100 from other contracts. "Besides saving costs that would have been incurred by special transport, we also saved a lot of time that would have been necessary for the relevant approval documents. Instead, we simply loaded the RM100 onto the trailer and went to the job site. The compact crusher handled the last part of the journey on the mountain road itself, using its crawler gear and via remote control. The rock faces were blasted by Kostmann GmbH's blasting engineers in several stages, which is why the people and the machinery involved had to leave the site from time to time. All in all around 15,000 tonnes of gneiss were prepared. A hydraulic rock breaker was used to break the extremely tough and hard rock down to a feed size of up to 600 mm and it was then fed into the vibro channel of the RM100 by a 25 tonne excavator loader.
Perfect performance for a crusher of this size
The RUBBLE MASTER "Feed Control System" ensures maximum conveyor performance and smooth, uninterrupted material flow, with the crusher regulating the optimum operating conditions itself. Engineered by RUBBLE MASTER HMH, the crusher is designed to handle high throughput and features impact elements that assist the crushing process. The final aggregate size can be set using speed control and guarantees the optimum quality of the end product. This is how the compact impact crusher also processed this material to make homogeneous 0/70 mm broken rock, achieving a daily output of around 850 tonnes on average. The crusher was able to process the entire amount of rock in 18 days.
"RUBBLE MASTER and I were of the same opinion when we had our project meeting – this material was going to be a challenge for the RM100," says Martin Kaimbacher, explaining the decision. "The crusher was really pushed to the limit in this job but still showed reasonable consumption and wear data. And the performance was absolutely perfect for a crusher of this size. If you take into account the savings in transport and being able to handle this or similar contracts at all in a cost-efficient way, the arguments in favour of the compact class are convincing. The end product was very homogeneous and easy to compact when reused in the track building process. Even if there are no particular guidelines that we have to observe in forestry track building, we still attach great importance to quality. And this is why we will be using a RUBBLE MASTER again in the next appropriate project."
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Published by: RUBBLE MASTER HMH GmbH, Austria, September 2008