3D concrete printing is transitioning from an experimental technology into a practical tool for the European construction industry. One of the most notable examples is the COBOD BOD2 construction 3D printer, which is used to erect residential homes, social infrastructure, and commercial buildings.
The BOD2 is a large-format gantry system featuring three axes of motion (X, Y, and Z). The printer receives a digital model of the building and deposits concrete layer by layer, constructing walls directly on the building site. Thus, the workflow—BIM → digital model → control data → 3D printing—enables the project to be transferred almost directly from the computer to the construction process. COBOD uses slicing software to convert the digital model into printer commands.
The BOD2 features a modular design: 2.5-meter metal sections are assembled directly on-site. The maximum printing area can reach approximately 14.6 m in width, 49.4 m in length, and 8.5 m in height. The maximum print head speed is 250 mm/s. The printed layer can reach a thickness of 75 mm and a width of 500 mm .
A key feature of the technology is that it uses standard concrete with local aggregates rather than specialized, expensive 3D printer "ink." COBOD notes that aggregates up to 10 mm in size can be used; the typical strength of the concrete is around 30–35 MPa , with the mix composition adaptable to local requirements. This enables the use of local concrete plants, ready-mix trucks, or mobile mixing equipment.
The system itself is relatively quick to assemble. For a standard configuration, COBOD cites a minimum of around six hours, though the current technology page notes that an experienced team can ready the printer for operation in under four hours; larger, multi-module configurations require more time. A small team—comprising a printer operator, a materials specialist, and an assistant—is sufficient for operation.
Construction speed depends on the project. For example, a house with an area of approximately 100 m² can have its wall structure printed in about 1 to 4 days. In Germany, PERI used the BOD2 printer to print approximately 600 m² of walls for a data center in Heidelberg in 140 hours.
The technology is already being used in several European countries. In Germany, the BOD2 was used for the serial construction of housing and a data center; in Portugal, for printing a residential building; in Ireland, for social housing; and in France, PERI executed the major ViliaSprint² project—a residential complex comprising 12 apartments and approximately 800 m² of floor space, printed directly on-site.
Thus, the BOD2 demonstrates how BIM, robotics, and 3D printing integrate into a unified digital construction workflow: the architect creates a model, software converts it into a printing path, and the robotic system automatically constructs walls featuring the openings and utility penetrations specified in the design.
Source: cobod.com
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