Aussie researchers develop eco-friendly roof tiles using coal ash and recycled glass, cutting CO₂ emissions by 13%
RMIT University Key facts: RMIT University and Bristile Roofing developed sustainable roof tiles using coal ash and recycled glass, reducing CO₂ emissions by 13% compared to traditional concrete tiles The tiles replace 10% cement with pond ash and 10% river sand with unwashed glass waste, whilst maintaining quality and improving fire resistance Successful full-scale manufacturing trials were conducted at Bristile Roofing’s Melbourne facility, demonstrating commercial viability The technology has also been adapted to create concrete bricks using 35% waste materials, offering 30% better insulation than conventional bricks Australia produces 12 million tonnes of coal ash annually and 1.3 million tonnes of glass waste, making this innovation significant for waste management A groundbreaking collaboration between RMIT University and Bristile Roofing has led to the development of sustainable roof tiles incorporating coal ash and recycled glass, achieving a 13% reduction in CO₂ emissions compared to traditional concrete tiles. This Australian innovation addresses the pressing issue of industrial waste management by re-purposing materials that would otherwise contribute to landfill, while offering consumers a durable, fire-resistant roofing option that meets Australian Standards. The full-scale manufacturing trials at Bristile Roofing’s Melbourne facility produced hundreds of these eco-friendly tiles, demonstrating both environmental and engineering benefits. A comprehensive circular life cycle assessment of the new tiles, covering the entire process from raw material production through to end-of-life landfilling, demonstrated a 13% reduction in CO₂ emissions compared to conventional concrete tiles. RMIT’s Dr Yulin Patrisia, Bristile Roofing’s Samantha So, RMIT’s Dr David Law and student Madushan Mudiyanselage at the Bristile factory in Dandenong. RMIT project lead, Dr Chamila Gunasekara, said this substantial environmental benefit largely stems from using harvested pond ash and unwashed recycled glass sand, which avoid energy-intensive processing and effectively replace virgin materials. “By replacing 10% of cement with harvested pond ash and 10% of […]
