Cambridge Engineers Develop Recyclable Concrete Blocks

Pioneering researchers have unveiled concrete that can be broken down and reformed, potentially revolutionizing construction waste management.

30 May 2025 at 08:42 | By Justin Young

Researchers at the University of Cambridge have developed a new type of concrete that can be fully recycled and reused, potentially revolutionizing the construction industry. The innovation aims to reduce the enormous carbon footprint associated with traditional concrete production.

The new material, dubbed ‘Recrocrete,’ breaks down chemically after use, allowing its raw components — aggregates, cement, and sand — to be separated and reconstituted for new building projects.

Professor Lena Mahoney, who leads the research team, describes it as ‘concrete with a memory.’ “It’s designed to forget its shape, but not its strength,” she said.

In lab tests, Recrocrete has shown performance levels comparable to conventional concrete, while producing 60% fewer emissions. The mix includes low-carbon additives and alternative binders derived from industrial by-products.

Construction firms across the UK have expressed interest, especially as legislation begins to favor circular building materials. Trials are now underway at two London development sites.

The innovation arrives at a time when the built environment accounts for nearly 40% of global greenhouse gas emissions. Greener materials are seen as critical to achieving climate goals.

Critics point to cost and availability, but the Cambridge team believes scaling up production will lower prices. They are partnering with industry groups to refine production methods and assess real-world feasibility.

Recrocrete could change how buildings are designed — with demolition and reuse planned from the outset. “It’s about building smarter, not just greener,” said Mahoney.