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The City of Sydney has been resurfacing roads with TonerPave to reduce its carbon footprint.
The City of Sydney has been resurfacing roads with TonerPave to reduce its carbon footprint.
 










Council trials low carbon asphalt mix

A low carbon asphalt mix that uses recycled printer toner could soon be adopted by councils across Australia.

TonerPave asphalt, which is believed to be the world’s first commercial use of toner waste, is currently being trialled by the City of Sydney to resurface sections of road as part of its aim to reduce carbon emissions by 70 per cent. Similar trials have already occurred in Melbourne.

As previously reported by Quarry, TonerPave is a collaboration between resource recovery company Close the Loop and leading asphalt producer Downer, which is the road contractor for City of Sydney.

Sergio Cinerari, CEO of Downer’s infrastructure services, explained, “[Close the Loop collects and recycles] huge quantities of toner cartridges for large printer and copier companies. The cartridges are then shredded for recycling and the toner powder comes to us to be made into TonerPave at our Rosehill plant.”

Cinerari added that the toner powder contained particles comparable to that of asphalt, and that its use in the road blend reduced the amount of bitumen required.

Production benefits

City of Sydney construction services manager Andrew Christie claimed that using the new technology could significantly reduce the amount of energy used in production, noting that TonerPave was heated at temperatures 20 to 50 degrees lower than those required for conventional asphalt.

He also pointed out that the initiative kept printer cartridges out of landfill. “Landfill sites produce huge amounts of methane, a greenhouse gas with 25 times the global warming potential of CO2,” Christie stated.

In order for the current trial to be seen as a success, TonerPave would need to prove as resilient as regular asphalt with a similar 30-year lifespan, Christie told The Guardian. “In two or three years we should have an indication if it is a good alternative to traditional asphalt. Hopefully we can start to use it across Australia,” he said.

Close the Loop marketing manager Peter Tamblyn added that the toner recycled by the company over the next year would contribute to more than 100,000 tonnes of asphalt production – compared to the 750,000 tonnes of asphalt Australia used in 2014 – and that the company was investigating importing toner waste from international markets. “The rest of the world is looking at this,” he told the global news service.

According to Sydney Lord Mayor Clove Moore, around 20,000 tonnes of cartridge waste has already been recycled in asphalt across Australia since the TonerPave initiative began in 2012.

“If we’re serious about tackling climate change we need to take action in our cities as this gives us the greatest opportunity for slashing carbon emissions,” Moore stated. “It’s really great to see innovative ideas being used across our city to recycle waste into valuable resources."

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Councils adopt low carbon asphalt option



















Saturday, 23 June, 2018 09:00am
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