Australian quarries are first Mobile recycling saves costs to see new Sandvik screen and the environment
The first Sandvik branded mobile screen to be commissioned in Australia was successfully handed over to SEE Civil (South East Excavations), which operates two quarries owned by McGeary Bros. at Wardell in northern New South Wales. After extensive consultation with Precision Screen, the exclusive agent for Sandvik mobile crushers and screens in Australia, SEE ordered the robust QA330 tracked screen. According to Alan Lippiatt, SEE Quarry Manager, “the Sandvik QA330 was ideal as it easily integrated into the existing set up at the Wardell quarry operation,” in particular, its long conveyors provided the necessary height and clearance to feed the existing crushers. “The Sandvik QA330 also delivers higher production through its large screening area and high frequency double deck screen,” Lippiatt adds. Ross Smith, SEE Business Development Manager, adds that the Sandvik QA330 “is very user friendly, and simple to operate and maintain.” The quarry operation at Wardell is rather interesting. Although the two quarries are nearby, they produce separate products that are largely being used for the nearby RTA Alstonville bypass project. Materials from the Chert (quartzite) quarry are being produced to meet the base and sub-base specifications, while the Argillite
quarry produces the select fill, bridging layer and drainage blanket material. The Sandvik QA330 was operational on the same day as it was delivered on-site at Wardell, and is now integral to the production of high quality SEE Civil quarry products. Its modern chassis design ensures in-built machine quality and strength for maximum up-time and productivity on-site. The QA330 is also designed for optimum fuel economy and low operating costs. And when back-up and spare parts are required, “Precision Screen is always there to help you out,” Lippiatt says. This relationship has been further strengthened locally through Sandvik’s global after market support and standard stock parts. In addition to commissioning the first Sandvik branded mobile screen in Australia, SEE Civil has been consistently achieving ‘firsts’ through its innovation and resourcefulness. Since its establishment in 1988, the SEE group has grown to be a leader in its field and specialises in a large variety of construction projects, including earthworks, civil, road construction, water and sewer, hydro-transportation, dredging, quarrying, crushing, screening, retaining walls, environmental works and all aspects of residential, commercial and industrial developments.
PDi • Issue 2 - 2010 • Bauma Special • April - May
Aspern Vienna’s Urban Lakeside, a complete new urban development, is taking shape is on the 240 hectare site of the former Aspern Airfield. Approximaty 2.3 million square metres of gross floor space will be created by the year 2028, including 8,500 housing units for 20,000 residents and 20,000 workplaces. The Underground line U2 will also serve the new district by 2013. A lively urban district will evolve, with which Vienna will make active use of the opportunities and challenges of the EU enlargement, aiming to set new standards with a “21st Century city.” Wien 3420 Aspern Development AG, a subsidiary of the Vienna Business Agency (WWFF) and the Bundesimmobiliengesellschaft (BIG), was created to direct this major building project. The consortium ARGE HABAU Hoch- und Tiefbau GmbH/Gebrüder Haider Bauunternehmung GmbH was appointed to demolish the former taxiways and runways.
On-site recycling means maximum benefits For reasons of environmental protection, and especially due to the huge cost benefits, mobile recycling is a key feature of this prestigious urban development project. HABAU Hoch- und Tiefbaugesellschaft, one of Austria’s leading construction companies and a leader in environmental awareness, has counted on mobile recycling with RUBBLE MASTER Compact Recyclers since 2004 because the high-performance impact crusher allows the material to reused in its entirety. Bernhard Radinger, Waste and Environment Manager at the HABAU Group, is using the RM80 with mobile oversized grain solution once again for this project. He says that before work began, extensive evaluation was necessary for the over 70,000 m2 site. ”Vienna/Aspern Airfield was a main centre in the Second World War and any war relics had to be found,” Radinger says. ”After this work had been completed, the job was to demolish around
15,000 m2 of concrete from the former airfield and recycle it. As a partner in the consortium we count on cost-saving on-site recycling.” Radinger adds that HABAU’s experience with the RM80 led to its use at the Aspern project. “The mobile impact crusher was extremely efficient at the large-scale demolition project at the Vienna/St. Marx slaughterhouse, for example, and we frequently use it for inner city demolition projects,” he says. The decision was also based on the machine’s outstanding performance with this material, and the ability to produce readyto-use value grain in a single pass with the OS80 mobile oversized grain separator featuring closed-loop refeeding.” “This saves us a third of the normal workflow and expense,” Radinger adds.
A record-setting assignment HABAU was tasked to process approximately 15,000 m3 of concrete, 20 percent of the entire concrete at the Aspern stie—by mid October 2010. A guillotine broke the concrete surfaces into segments. The lumps of concrete were lifted out by excavators, pulverised down to a maximum feed size of 50 cm, and then put on a pile. The feed material was then loaded into the crusher’s 23 t vibro channel using an excavator and, a wheeled loader with a 3.2 m3 bucket. The material is processed quickly in the impact crusher with automatic conveying in line with crusher workload, material and feeding type. The patented OS80 oversize grain separator, which is linked to the main discharge conveyor of the crusher by quick-release levers, grades the material cleanly to 0/32 mm. The oversized material is then returned to the crusher inlet where it is then crushed again. Radinger describes the throughput of the compact crusher as “impressive”, delivering ready-to-use 0/32 mm aggregate with peaks up to 100 t/h.