Wirtgen China will help to cut demolition waste
Germany-based Wirtgen Group will introduce
on-site recycling technology developed by its Kleemann GmbH subsidiary
when it will be introduced in China at Bauma China in Shanghai,
in November 2010.
Kleemann GmbH recycling plants take demolition waste, demolished
concrete and spoil and convert it into high-quality aggregate
for the construction industry. By recycling demolition waste
on-site, the process can dramatically reduce the amount of energy
and CO2 emissions required in hauling material away from a demolition
site. Demolition waste can be used as aggregate for the next
building project on that site and will reduce material costs
and the need to extract fresh aggregate by quarrying.
The core of the process is an impact crusher which is fed with
demolition material that has been screened for size with particles
larger than 60mm grain size, fed into the crusher while smaller
particles are put aside for further processing. The crushed aggregate
is then sorted and separated by size and is then cleaned from
light materials. Recovered ferrous metals are then removed by
electromagnets and are recycled.
The recycled aggregate product is upgraded with natural sand
and cement to a useful, hydraulically-bound base layer.