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In a groundbreaking achievement, Holcim Switzerland, in collaboration with PERI 3D Construction, has completed the nation's first onsite 3D-printed building. This 150-square-meter showroom, constructed in just 55 hours over eight days, exemplifies the rapid advancements in 3D printing technology within the construction industry.
Project Overview
The showroom, commissioned by Kobelt AG—a company renowned for its high-quality construction and renovation services—addresses the firm's need for additional space in St. Gallen, Switzerland. Embracing innovative construction methods, Kobelt AG partnered with Holcim to explore the potential of 3D printing, marking a significant departure from their traditional focus on timber construction.
Innovative Design and Construction
The structure features 6.2-meter-high curved walls, crafted using a specially formulated concrete mix developed by Holcim. This innovative blend contains less cement yet offers superior strength compared to conventional mortars, underscoring both sustainability and structural integrity. The design incorporates fan-shaped steel supports and a wing-shaped roof made of multi-layered wooden panels, creating a striking contrast between the printed concrete and wood-steel elements. Inside, the minimalist design combines wood with the unique concrete printed walls, creating functional zones including meeting areas, sample displays, a children's corner, a coffee kitchen, and a separate meeting room accessed by a rounded staircase. Seamless flooring and oak-look interior fittings contribute to a modern, uncluttered aesthetic.
Technological Advancements
Utilizing COBOD's BOD2 3D construction printer, the project demonstrates the efficiency and precision achievable with modern 3D printing technology. The printing process was completed in eight days, with a total of 60 cubic meters of concrete used. This method not only accelerates construction timelines but also reduces material waste and environmental impact. Henrik Lund-Nielsen, Founder and General Manager of COBOD, emphasized the benefits of using real concrete over mortars in 3D printing, highlighting the potential for reduced cement usage, lower CO₂ emissions, and cost savings.
Sustainability Benefits
3D concrete printing offers several sustainability advantages. By enabling smart design, it can reduce material use by up to 50%, building better with less without compromising performance. Additionally, 3D-printed walls can lower a building's carbon footprint. For instance, in the Phoenix Bridge project, a proprietary concrete ink with an optimized low-carbon formulation reduced the structure's overall carbon footprint by 25%. Furthermore, 3D printing supports circular construction principles, allowing for the easy disassembly and recycling of building components, thereby conserving resources.
Conclusion
The completion of Switzerland's first onsite 3D-printed building marks a significant milestone in the construction industry, showcasing the potential of 3D printing technology to revolutionize building processes. This project not only demonstrates the feasibility of rapid, efficient, and sustainable construction but also sets a precedent for future innovations in the field.
Note: This article is based on information from Holcim's official website and other reputable sources.
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