A groundbreaking collaboration between RMIT University and Bristile Roofing has led to the creation of sustainable roof tiles made from coal ash and recycled glass, reducing CO2 emissions by 13% compared to traditional concrete tiles. These innovative tiles not only minimize waste but also offer a durable, fire-resistant option that meets Australian Standards.
The tiles are produced by replacing 10% of cement with harvested pond ash and 10% of river sand with unwashed glass waste, totaling 20% virgin material replacement. This approach reduces landfill waste while enhancing fire resistance, a valuable feature for Australian roofing.
Dr. Chamila Gunasekara, project lead, highlights the environmental benefits: “We reduce waste going to landfill and produce an improved concrete product with enhanced fire resistance, a valuable feature for roofing in Australia’s climate.”
Australia generates around 12 million tonnes of coal ash and 1.3 million tonnes of glass waste annually, with much of it ending up in landfill. The research demonstrates that significant volumes of these materials can be reused without compromising quality or safety.
The team is also developing sustainable bricks using 35% waste materials, providing 30% better insulation than conventional bricks.
Image Courtesy: manmonthly.com.au
