[torginus]

I never understood how 3D printing buildings even come about. Desktop 3D printers work by melting thermoplastics that solidify when cooled down and is ready for the next layer.

With concrete, you have to wait for it to set before you can print on top of it. D

[ben_w]

I think it happened because a nerd like us wanted to make a castle for their kid to play in, and that became an effective concrete printer, and that got in the news and inspired… mostly buildings that would have been easier with prefabricated concrete slabs, and which almost completely fail to take advantage of the opportunities that 3D printing can offer.

[dhosek]

This page from Cemex might answer some of your questions

https://www.cemexventures.com/3d-printing-in-construction/

[dhosek]

Tt’s worth noting that this article makes it sound like ICON invented everything from scratch, but the technology is much older than the company.