Latest News Tuesday, November 16, 2021, 7:38 AM
Construction technology group STRABAG, together with formwork and scaffolding manufacturer and 3D concrete printing pioneer PERI, is building an office building of approximately 125 square meters next to the asphalt mixing plant in Hausleiten.
Special dry powder mortar for architectural 3D printing projects, with long construction period and good pumpability, provided by Lafarge. “3D concrete printing provides an important innovation driver for the construction industry and represents an exciting addition to the range of available construction methods,” explains Klemens Haselsteiner, member of the STRABAG management committee responsible for digitalization and innovation.
"Through this actual test, we hope to further develop 3D concrete printing technology with our partners PERI and Lafarge. The joint planning and design of Hausleiten has provided some important insights for the future."
Thomas Imbacher, Director of Innovation and Marketing of PERI AG, said that the emerging 3D concrete printing technology has great potential.
"Just less than a year ago, we printed the first residential building in Germany using the BOD2 printer from our Danish partner COBOD," he continued. "Since then, the PERI team has successfully implemented several additional printing projects. Together with our partners STRABAG and Lafarge, we are now bringing this new architectural form to Austria, and we are very happy to be able to build the first in Hausleiten A 3D printed office building."
Architectural 3D printing has many advantages, and its use has technical and financial significance. The COBOD BOD2 gantry printer used by Hausleiten can print concrete at a speed of up to one meter per second, which significantly reduces construction time. The structural engineering of the Hausleiten building can be completed in approximately 45 hours of pure printing time. Compared with classic concrete buildings, architectural 3D printing also provides greater design freedom and can easily create complex circular designs. "3D printed buildings will help establish a new, digital and environmentally advanced language for concrete," said Berthold Kren, CEO of Lafarge Austria.
"Smart materials are convincing in their applications and provide a high degree of architectural freedom in design. It allows us to build more things with less money."
PERI uses COBOD BOD2 gantry printers in Hausleiten's architectural printing project. This printing technology comes from the Danish manufacturer COBOD, of which PERI acquired a large number of shares in 2018.
The print head moves around three axes on a firmly installed metal frame. This allows the printer to be moved to any location in the structure being built, requiring only one calibration. The 3D printer applies the printing material (dry mortar) in layers to create walls. Laying two parallel printing paths will form a hollow wall, which is then backfilled with cast-in-place concrete as the load-bearing system. To create the exterior wall, the second cavity was formed by printing another path of mortar outside the previous wall and filling it with insulating material. The printed wall can be seen as a kind of disappearing template system. During the printing process, the printer has already considered the water, electricity, and other utility lines and connections that will be installed later. BOD2 has been certified, so you can also work in the printing room during the printing process. This allows manual work, such as laying pipes and connections, to be easily integrated into the printing process. Printing materials are stored in silos. After adding water during the printing process, the ready-to-use dry mortar will be pumped directly into the print head. The Tector Print brand material used to print the Hausleiten office building was developed by Holcim and is suitable for the special requirements of 3D concrete printing.
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