A recycled glass is being trialled on roads in Horsham Downs, reports Tauranga’s Sunlive. The process, developed by Downer and Road Science engineers involves using crushed glass to replace conventional sand in roading asphalt.
The product is currently being trialled on a 1500sqm site at the intersection of Horsham Downs and Lake Road in the Waikato after Waikato District Alliance was approached with the idea.
“We’re always looking at ways to innovate and improve environmental sustainability where possible,” says Waikato District Alliance capital works manager Steve Uffindell.
“This single project has used the previously non-recyclable material created by almost 12,000 bottles and has produced an asphalt that has, so far, outperformed the existing material.”
Downer is now evaluating whether it can use crushed glass as its primary source of sand and whether there are other waste streams that could be incorporated into roading materials in the future.