Rubble Master HMH GmbH

RUBBLE MASTER RM100 in large-scale project in Ravensburg


Source: Rubble Master HMH GmbH

GALILEO throws light on recycling loop
In order to present the topic of the recycling business for mineral construction debris in a comprehensible way to a large audience, GALILEO - the science programme - was looking out for an exciting operation for a feature scheduled for the middle of December on the German channel PRO SIEBEN. First contacts to crusher manufacturers had been made at the BAUMA show in Munich. They eventually found an appropriate large-scale site together with RUBBLE MASTER, the inventor of mobile compact recycling. Filming started on October 8th.

The scene of the television report is located in the middle of Ravensburg's industrial estate, directly on the junction in the direction of Ulm: the site of the construction company Hangleiter, which celebrated its 100th anniversary in 2005, was demolished. The structures of the company, which is steeped in tradition and developed from a workshop to an innovative supplier for turnkey building and renovation, had progressed to such an extent that the original premises are no longer required. This means that 33,000 m³ of building fabric has to be demolished in only 5 working weeks and, as far as possible, reused again on site.
The lead contractor is the company Max Wild of Berkheim, demolition specialists for buildings, industrial facilities and bridges. With a workforce of over 250 employees, Max Wild GmbH is known for its fast, high-quality and reliable handling of all orders when it comes to demolition, heavy transport, horizontal drilling, underground works and municipal services. 'Hundreds of customers rely on the frequently proven quality, prompt and cost-efficient implementation, plus the risk-free and careful realisation of the demolition work,' says a pleased Managing Director Max Wild: 'We are leaving behind ecologically safe building land with this project in Ravensburg, too, which can then be used for new buildings.'

How does building material recycling work?
Filming started on October 8th, at the same time as the gutting of the buildings. Site manager Andreas Haag took over the building site with his team. The second project phase also to be documented in the GALILEO report was the demolition process, in which two additional demolition excavators with a range of up to 25 metres came into operation. The material – all in all 7,000 tonnes, mostly prefabricated concrete walls from the production buildings and general rubble – had to be freed from foreign matter, sorted and stored in piles. Then it was time for the third phase – on-site recycling – to start on October 22nd. In total some 3,000 m³ of demolition debris had already been accumulated by then, with 500 m³ thereof prepared for a feeding size of 700 mm.

Mobile crusher recycles demolished material on site
It was now time to bring on an RM100 RUBBLE MASTER impact crusher. The track mounted crusher with only 28 tonnes transport weight was deployed to the job site quickly and efficiently using a four-axle lowloader trailer from Wild. Thanks to radio remote control for crushing and moving around, the compact crusher was unloaded, moved into position and started up in a matter of minutes. Machine operator Benjamin Schneider started immediately with the feeding process. The high-performance impact crusher processed the heterogeneous feed material consisting of pulverised concrete and large lumps of rock to a grain size of 0/63 mm with no trouble at all. The large-scaled magnetic separator reliably removed all the metal parts from the final grain. This material will be used later to restore the plot on site.

Resident-friendly operations guaranteed
The immediate proximity to company buildings, a DIY store and the bypass had to be taken into account in both the demolition and crushing operations. The extensive ENVIRO Package of the RM100 was, therefore, also a huge benefit in this inner-city project. Since 2003 all RUBBLE MASTER crushers have been equipped with integrated noise protection, thus keeping both residents and authorities happy through low emission values thanks to an efficient, low-consumption engine and effective drive concept, low amounts of oil (hydraulic fluid) and efficient dust suppression at several points in the crusher, at the outlet and at the discharge section. Site manager Andreas Haag (right) and his construction machinery representative from Jürgen Kölsch GmbH of Heimertingen, Alexander Hirschle, were convinced by the performance of the mobile crusher.

Recycling cuts costs and protects the environment
Only the office building was still complete, 2 further buildings had been cleared and were demolished without delay. Likewise the steel structures of the buildings, which were expertly removed using demolition grapples. While work on the job site in Ravensburg progresses tirelessly until the entire demolition is complete and also the foundations have been torn out and broken using hydraulic hammers, the last date for filming is being organised.
This is to be used to demonstrate how the RM100 with OS100 mobile oversize grain system and refeeding creates graded material in a single pass from the road and car park areas of the demolition site in Ravensburg which is then reused on a nearby roadbuilding site. This is how the recycling loop closes and produces high-quality, reusable building materials – to protect the environment and resources, plus the cost schedules of the contractors involved.

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