That’s not the only use of the technique though, and perhaps one of the simplest is to use a 3D-printed mould for casting concrete. It’s what [ArtByAdrock] is doing in their latest video ...

as it successfully cast its first Full Span Pre-Stressed Concrete (PSC) Box Girder for the Maharashtra section, as per an official release. This 40-meter span, weighing approximately 970 metric ...

We often forget that concrete is easy to use and creates things of good substance. Of course, instead of casting it, you can print it directly with the right gear.