This project marks a significant advancement in construction technology with the successful creation of a footbridge using 3D-printed concrete beams.
- Constructed at Norfolk’s Constructionarium site, the footbridge features two 10.8m long 3D-printed beams, alongside timber components.
- The development signifies a potential reduction in construction costs and carbon emissions due to the novel use of 3D-printed concrete.
- Minimass claims the project overcomes previous industry challenges related to reinforcing 3D-printed concrete.
- The project was supported by an Innovate UK Net Zero grant, emphasising its sustainable credentials.
The construction of a demonstrator footbridge with 3D-printed concrete beams in Norfolk heralds a transformative era in civil engineering, spearheaded by the startup minimass. At the Constructionarium site, the structure was completed using two 10.8m beams of minimass origin, complemented by Scottish glulam timber decking and parapets, showcasing an innovative blend of materials.
This pioneering project demonstrates a substantial decrease in both cost and carbon footprint compared to standard construction methods. By using 3D-printed concrete, minimass proposes a 40% reduction in material and maintenance costs while slashing the embodied carbon by 30%, excluding foundation aspects. This approach challenges traditional perceptions and methods of construction, promoting environmental sustainability.
A notable challenge addressed by this project was the reinforcement of the 3D-printed concrete beams, aligning with Eurocode 2 compliance. Andy Coward, minimass’s founder and CEO, highlights their breakthrough in integrating reinforcement within the 3D-printed structures, a leap not previously achieved in similar projects. The innovation lies in strategically utilising materials based on their respective strengths, employing concrete for compression and steel for tension, thereby minimising superfluous material usage.
Despite its potential benefits, market acceptance of such pioneering construction techniques remains hesitant. Sarah Blake, minimass commercial director and co-founder, reflected on the difficulties faced in persuading industry stakeholders to embrace this unproven technology due to inherent risks associated with novel construction methodologies. Their efforts were largely supported by an Innovate UK Net Zero pre-commercialisation grant, facilitating the project’s realisation amidst a competitive and cautious industry.
As the footbridge undergoes performance monitoring over the coming months, data on strain and temperature will offer insights into the evolution of the material’s strength and behaviour under stress. This data-driven approach aims to validate minimass’s innovative claims, positioning the project as a viable alternative in the construction sector. Upon testing completion, the bridge is designed for disassembly and will be donated to Constructionarium.
This groundbreaking project exemplifies the potential for 3D-printed materials to revolutionise sustainable construction practices.
