In the middle of the last decade, 3D concrete printing was at the top of its hype curve. The interest was red-hot, and from abroad it was reported that printed houses shot up in the east and west. Even though the technology is no longer getting so much publicity, printing continues. However, the approach to 3D concrete printing is still based on trial and error, i.e. one tries rather than make it succeed.
It takes both development and more knowledge to move the 3D concrete print technology from being experimental to a reliable method in construction.
3D concrete printing is, like other 3D printing technologies, an additive manufacturing technology. I.e. that one builds a construction layer upon layer. Typically, significantly less material is used by 3D printing than by using the conventional manufacturing methods.
A lower material consumption is particularly interesting for concrete construction due to the heavy CO2 footprint of concrete. With 3D concrete printing, the CO2 emissions of concrete construction can be reduced.
At DTU, researchers are helping to develop the next generation of 3D concrete prints, and they are also looking for completely new recipes for concrete so that the material's CO2 footprint is reduced as much as possible.
A hyped technology is maturing.