A collaboration between a building materials company and an automation supplier for additive manufacturing has created the world’s largest 3D-printed building with real concrete, 3DPrint.com reported.
A Mexican company, CEMEX, supplies materials for conventional building construction and has worked with the Danish Construction of Buildings on Demand (COBOD), a technology provider for 3D printing, to address this issue. Their solution reduces the proprietary ink used in 3D printing buildings to just 1% of the cement mix, making it highly scalable, 3DPrint reported.
Previous attempts at 3D construction using concrete have used special mixtures to remedy the slow drying of normal concrete during the construction process. This is a major obstacle because wet concrete does not have the same load-bearing capacity as its dry counterpart and does not support the structure.
On Tuesday, December 14, 2021, the German Technical University of Oman, GUtech, completed 3D printing of the walls of the largest 3D printed building to date in real concrete. The importance of the event was underlined by the presence of His Excellency Sultan Al-Habsi, Minister of Finance of Oman, as well as more than 200 guests, including several ministers and personalities of Oman, who attended the event in Muscat, the capital of Oman.
Also read, Prestressed Concrete- Invention, Definition, Why and Where it is used
The house measures 190 m2 (2,100 square feet) and is typical of public housing in Oman. It has 3 bedrooms, three bathrooms, a living room, a kitchen, and a guest reception area. The house was printed in two stages. While the material recipe was adjusted and the Omani team formed when printing the first part of the house, the second part of the house was created by the Omani team themselves and only took five days. A sign of rapid improvement in learning and productivity in 3D printed projects.
In total, the entire project took just five days to complete while reducing the material costs to € 1,600 ($ 1,810) from the € 20,000 ($ 22,627) it would have cost in using the usual proprietary dry mixes for 3D printing.
While many 3D-printed buildings have been seen in the Middle East, the 190 m2 (2,100 square feet) building in Oman is the first building printed with real concrete instead of the traditional dry mortar used in most others. 3D printed buildings. In order to make concrete 3D printable, GUtech used the D.fab solution developed in cooperation by COBOD and CEMEX, in which the concrete can have particles up to 10mm (1/3 inch) and is made from locally available cement. , Sand and gravel are made. CEMEX and COBOD published last week the news of the D.fab solution in connection with the first 3D printed building in Angola. The D.fab solution was also used in Angola, so the concrete material costs for the 52m2 (575 SF) house were less than $ 1,000.
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Sources-
1.https://www.3dprintingmedia.network/the-worlds-largest-am-real-concrete-building-made-by-gutech-university/
2.https://interestingengineering.com/worlds-largest-3d-printed-building-made-with-real-concrete-is-now-open
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