New South Wales (NSW) Roads & Maritime Service acting director northern Vicky Sisson said that the project team for the Woolgoolga to Ballina upgrade recently completed two successful pavement trials using recycled glass in the concrete mix.
She said that a grant for the trials was awarded by the NSW Environment Protection Authority. 鈥淩ecycled glass has previously been used for ramps and drainage but this is the first time it has been used on the main carriageway on the Pacific Highway,鈥� she said.
The glass was collected locally from Lismore City Council鈥檚 waste collection system, which includes household recycling bins and 鈥榬eturn and earn鈥� stations. 鈥淎fter being sorted, the glass was crushed into sand at Council鈥檚 material recovery facility, delivered to on-site batch plants for cleaning before being mixed with sand, and used in the normal concreting process,鈥� said Sisson.
The recycled glass sand was used in place of sand quarried for the purpose, reducing material consumption and waste at the same time. 鈥淭he mix meets Roads and Maritime Services鈥� specifications for concrete pavement and will be tested for quality in the same way as traditional concrete pavement,鈥� she said. 鈥淭he good news is this mix will not require any additional maintenance. It鈥檚 exciting to see this new market grow and it is hoped recycled glass is used on more NSW road projects in the near future.鈥�
NSW Environment Protection Authority鈥檚 executive director for waste and resource recovery, Carmen Dwyer, said the AU$107,636 grant was awarded through the 鈥榃aste Less, Recycle More鈥� programme, which aims to stimulate new investment and transform waste and recycling across the state. 鈥淲orking with large organisations in the civil construction industry creates great opportunities to reduce landfill and support new markets and opportunities for recyclable materials, reducing the impact of changes in the global recycling market,鈥� she said. 鈥淭hese grants aim to foster innovative thinking while removing the potential risks associated with implementing new processes.鈥�
Got a story? Email news@theconstructionindex.co.uk
