Facing an increased need to engage with practices that divert waste from landfill and aware of successful trials of roads built with asphalt containing recycled materials elsewhere, Port Stephens council were inspired to conduct their own trial. Partnering with COLAS and the NSW EPA, they began trialling an asphalt product containing a high recycled content.
The resource recovery road replacement trial aimed to test the suitability of an asphalt product containing a high recycled content derived from problematic waste streams that were otherwise bound for landfill or stockpiling. These include:
The asphalt product has been used to for three key road projects; Salamander Way, Ferrodale Road, and Glenelg St. Combined these projects represent over 1km of asphalt, and have incorporated the equivalent of 138,667 glass bottles, 212 tonnes of recycled asphalt, and crumbed rubber from 1,921 end-of-life tyres.
These projects cumulatively saw the reduction of greenhouse emissions equivalent to 8,865 kg of CO2 compared to using virgin materials, as well as saving 8.8 tonnes of bitumen, 78.8 tonnes of crushed aggregates, and 10.4 tonnes of natural sand.
Further, the asphalt is 100% recyclable at the end of its first life as a feedstock for new asphalt for another road replacement project.
These projects are the first of many resource recovery asphalt projects in the Salamander Bay local government area.