Researchers at the University of Cambridge have developed a ground-breaking method for producing ultra-low emission concrete on a large scale. The innovative technique uses electric arc furnaces, typically used for steel recycling, to simultaneously recycle cement. Described by the researchers as an absolute miracle, the process addresses the significant environmental impact of concrete, the second most used material on the planet after water.
Concrete production accounts for around 7.5% of total anthropogenic CO₂ emissions, making it a critical area for decarbonisation. The Cambridge researchers discovered that used cement can replace lime flux in steel recycling, resulting in recycled cement that can be used to make new concrete. This approach not only reduces emissions but also reuses a waste product, creating a scalable and cost-effective solution. The next step is to implement this method on an industrial scale, which could play a crucial role in the transition to net zero.
