3D Concrete Printing Reduces Material Use In Structural Components
A research project in Vienna has explored how 3D concrete printing can produce structural building components while using considerably less material. According to the project team, the additive manufacturing process may reduce concrete consumption by up to two-thirds compared with conventional construction methods, without compromising load-bearing performance.
The Research Center for Building and Design at Hochschule Campus Wien conducted the multi-year C3PO – Concrete! 3D Printed Objects project together with the university’s High Tech Manufacturing degree programme. Funded by the City of Vienna, the research ran from August 2021 to July 2026.
Material-Efficient Structural Design
Instead of producing solid components, 3D printing places material only where it contributes to the structure. This approach can reduce resource consumption and create lightweight, geometrically complex forms that would be difficult to manufacture with conventional formwork.
The researchers also combined printed concrete components with prestressing elements to investigate further opportunities for material-efficient construction. Their work focused on balancing reduced material use with the structural requirements of load-bearing applications.
Robotic Layer-By-Layer Production
For the project, the university developed a dedicated 3D concrete printing system at its High Tech Campus. An industrial robot moves along a seven-metre rail system and deposits the printable concrete mixture layer by layer. The team also developed and tested several extruder systems.
Continuous improvements to both the installation and the printing material enabled the researchers to manufacture prototype components reliably. Current testing examines their load-bearing behaviour and durability, two essential factors for future architectural applications.
The project also connected research with education. Civil engineering, construction management and green building architecture students completed 16 Bachelor’s and 24 Master’s theses on subjects related to 3D concrete printing.
From Prototypes To Larger Building Elements
Research will continue through the follow-up project C3PRO – Concrete 3D Printed Reinforced Objects. Hochschule Campus Wien is collaborating with TU Wien, the Austrian Construction Technology Association and more than 25 construction-sector partners and public clients.
While C3PO concentrated on developing the printing technology and demonstrating its feasibility, C3PRO will investigate larger concrete components and floor elements. Researchers will study their performance under bending loads, with potential applications in residential and industrial buildings.
The efficient integration of reinforcement remains an important research challenge. Nevertheless, the completed project provides a technical and scientific foundation for scaling up 3D-printed concrete construction. Its combination of automated production, design freedom and targeted material placement could help reduce concrete use in future building systems.
Source: VIENNA.AT
Photos: HCW / Schedl / Pflegerfprsc