Cambridge Researchers 3D Print Smart Wall on UK National Highways

Cambridge researchers have achieved a significant milestone by developing the first 3D printed concrete infrastructure for a National Highways project. The innovative structure, known as a headwall, has been installed on the A30 in Cornwall and is equipped with sensors developed by Cambridge University. These sensors provide real-time information on temperature, strain, and pressure, enabling early detection of faults. By using 3D printing technology, the team was able to construct a curved hollow wall without the need for formwork or steel reinforcement, reducing costs, materials, and carbon emissions.

Over the past six years, Professor Abir Al-Tabbaa’s team at Cambridge’s Department of Engineering has been at the forefront of developing advanced sensor technologies and exploring the potential of self-healing concrete. Their expertise and collaboration with industry partners have resulted in the successful implementation of the 3D printed headwall on the A30. This pioneering project showcases the immense possibilities of additive manufacturing in the construction industry.

The wall, which measures approximately two meters in height and three and a half meters in width, was printed using a robot arm-based concrete printer at the headquarters of Versarien, an advanced engineering company in Gloucestershire. This cutting-edge printing method not only saved on costs and materials but also significantly reduced carbon emissions compared to traditional construction techniques. The curved hollow design of the wall, devoid of conventional formwork or steel reinforcement, derives its stability from its unique geometry.