Requirements for raw materials and materials testing
3D concrete printing
![Fig.: Illustration of the key properties of printable concrete based on the example of the CONPrint3D technology (basic drawings courtesy of Chair of Construction Machines, TU Dresden) [3]](https://www.bft-international.com/imgs/1/3/9/7/1/4/0/5_4_Mechtcherine_Abb-b53202da9af16c44.jpeg)
There is a rapidly growing interest in digital construction with concrete. The same holds true for the associated expectations in respect to this promising technology [1, 2]. However, a number of obstacles remain to be overcome for transferring 3D concrete printing into construction practice. One of the major challenges lies in developing a practicable method for defining, setting and testing the required material properties of fresh and hardening concrete.
Designing the rheological properties of printable concrete is a very complex process that sometimes involves contradictory requirements...
