2023-04-30 22:00:00
The Bauhof Bludenz has a special flat roof with a “feather-light” concrete ceiling. The start-up Concrete 3D is using “displacement bodies” to realize a ceiling construction that is a third lighter.
The recently completed building yard in Bludenz on Klarenbrunnstrasse has a special flat roof: it is 32.5 percent lighter than comparable concrete ceilings. This saved 33 tons of climate-damaging greenhouse gases during its manufacture.
3D concrete printing: With displacement bodies, concrete and steel can be saved
This is made possible by displacement bodies from the start-up company Concrete 3D.
“The order of the day is saving material,” emphasizes Philipp Tomaselli, Managing Director of Concrete 3D
With the new building yard, the managing director of the Walgau construction company had a good chance for a showcase project. A connection to Graz University of Technology was established via the company Concrete 3D, which specializes in 3D concrete printing: “3D printing enables the smart use of concrete, without any formwork,” emphasizes Georg Hansemann, project assistant at the Institute for Structural Design (ITE) at Graz University of Technology. “With the technology, completely new geometries can be created without waste, which are ideal for saving concrete and steel.”
Digitization in the construction process: Smart use of concrete helps protect the climate
The idea is as simple as it is impressive: Installing lost formwork from the 3D printer saves material and emissions. Using specially purchased software, the construction planner gbd calculated 792 displacement bodies for the 717 square meter flat roof – each one unique. Concrete 3D printed this with more than 60 tons of concrete and a total print path of 210 kilometers. The elements, which weighed up to 80 kilograms, were numbered, delivered to the construction site, positioned there on the formwork, reinforced steel laid in between and the whole thing filled with concrete. The result: a ceiling that is a third lighter and produced 24.4 percent fewer greenhouse gases.
The pilot project “Bauhof Bludenz” was very instructive for everyone involved
“For us, this is a reference for the potential of digitization in the construction process and sustainability in solid construction,” emphasizes Philipp Tomaselli. The flat roof completes the design by architect Marcus Ender: It rests on two 46 meter long supporting arches that span two wooden halls. Tomaselli is convinced by the design possibilities of the technology: “The shape and positioning of the recesses make the course of the forces visible.”
“From the positioning of the recesses to the introduction of the reinforcement to the concrete filling, the construction presented us with a number of challenges,” emphasizes foreman Daniel Burtscher (Tomaselli Gabriel Bau). The practical empirical values from the construction site are also central for the structural engineers from gbd and Graz University of Technology: “The ceiling is the largest construction of its kind in the world to date and provides important insights in order to further spread the technology, save material and protect the climate”, emphasizes Georg Hansemann.
Compensation for the additional effort by saving material
The additional effort for handling and logistics is compensated by the material savings and the expanded static possibilities. “The construction consists of concrete and steel and – unlike alternatives – does not require any plastic,” says Tomaselli. This means that it can be 100 percent recycled at the end of its useful life – a recyclable product.
1682893835
#Smart #concrete #SN.at