Extec In Australia (Continued)
Neideck is quick to point out that there is no shortage of demolition waste to recycle as City Circle operates the Extec equipment on its own demolition projects as well as to ‘finish off’ on other companies’ projects. “The Extec C12+ crusher and Extec S-6 screen are on tracks so we can transport them on low loaders to a project site and then move them around the site to the various stockpiles. It usually takes only a day to transport, off-load and set-up the Extec equipment ready for operation. We prefer at least 3,000 tonnes of material to crush which will require the equipment to be on-site for a week. Larger projects such as the Avalon Airport near Geelong can take up to 3 months and crush 30,000 tonnes of material.”
Another benefit of recycling demolition waste is the recovery of scrap steel. According to Neideck the return on scrap steel is currently $330/tonne which can cover the cost of fuel to crush the concrete. The return on the reclaimed concrete material is up to $15/tonne and most developers on-sell it for road base, drainage, etc. However, developers can also negotiate with their contractors to utilise the reclaimed concrete material on-site and thereby eliminate transport costs.
While selling reclaimed material will not cover the cost of a demolition project, the improved material recovery achieved with equipment such as Extec has seen the cost of demolition remain static for the past few years in Australia.
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EXTEC in Australia
EXTEC CRUSHES CONCRETE IN AUSTRALIA
The history of concrete can be traced back to Serbian huts dating from 5600 BC. Since then the Assyrians, Babylonians, Egyptians and Romans have used different concrete formulae for civil construction, with many fine examples still standing today. In 1756 John Smeaton, a British engineer, made the first modern concrete and today more concrete is used than any other man-made material in the world.
However, nothing lasts forever and when concrete structures are demolished for whatever reasons the resulting rubble cannot be compacted and it will not decompose. Up until recently most of the millions of tonnes of building and construction waste was dumped as landfill. In fact it was estimated that it accounted for up to 40 per cent of landfill in Australia. Fortunately, concrete recycling is now technically feasible and has a number of commercial benefits that has made it an attractive option in the current era of heightened environmental awareness and government legislation.
The City Circle Group was recently awarded a half-million dollar grant from Sustainability Victoria to invest in an Extec C12+ mobile concrete crushing plant and Extec S-6 screen. From the government’s perspective, building and construction waste recycling is an attractive area to invest in as it guarantees large tonnages of reclaimed material. The fact that the Extec C12+ crusher is truly mobile also provides the state government with the opportunity to open up new recycling possibilities in regional areas of Victoria. Previously, demolition waste in these areas was either dumped as landfill or transported to the large re-processors in Melbourne. By operating the mobile Extec C12+ crusher on-site in regional Victoria intra-state transport and material contamination (from other sites) are eliminated.
Demolition has been the core business activity of the City Circle Group for the past 25 years. According to Andrew Neideck, business development manager, the company diversified into recycling in 2001 as a result of the escalating cost of transporting and tipping demolition waste. This year the City Circle Group plans to double output of reclaimed concrete material to 350,000 tonnes and is confident it can sell more than it can produce.
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