Germany-based Wirtgen Group is to introduce onsite-recycling technology developed by its Kleemann GmbH subsidiary into China when it will be showcased in China at Bauma China in Shanghai in November 2010.
Kleemann GmbH recycling plants take demolition waste, demolished concrete, and spoil and convert into high-quality aggregate for the construction industry. By recycling demolition waste onsite the process can dramatically reduce the amount of energy and CO2 emissions required in hauling material away from a demolition site. And instead of demolition waste ending up in land-fill or being used as low grade hardcore it can be used as aggregate for the next building project on that site: thus reducing material costs and the need to extract fresh aggregate by quarrying.
The core of the process is a Kleemann impact crusher which is fed with demolition material that has been screened for size with large particles (more than 60mm grain size) being fed into the crusher while smaller particles are put aside for further processing. The crushed aggregate is then separated at 20 mm, 40 mm and 100 mm sizes, and is then cleaned from light materials. The ferrous metals contained in the demolition waste and demolished concrete are then removed by electromagnets and go for recycling in steel plants. The recycled product can then be used in the next building project on the same site.
And example of this technology in action Europes largest recycling plant is located in the vicinity of Amsterdams Schiphol Airport. The turnkey plant was designed and built by Kleemann for processing demolition waste, demolished concrete and asphalt into high-quality aggregate for the construction industry. It includes, among other units, Kleemanns largest impact crusher model SHB 20/160. The recycling plant has a feed capacity of up to 700 tons of material per hour. One year of planning, construction and assembly was needed before the new recycling plant was put into operation. To protect the environment from dust and noise, the entire plant was enclosed with a trapezoidal panel construction.
The recycled product is upgraded with natural sand and cement to a hydraulically bound base layer, and is presently used for soil stabilization at Schipho

Source: China Newswire