Quote Originally Posted by Feign View Post
Oh wow, it's not a concrete extrusion machine at all, but a powder and binder printing process that forms sand into a marble-like concrete. They will literally have to dig each build out from under a hill of sand once they're done printing... Kind of cool for chairs and tables, but at this scale it seems like more trouble than just traditionally building the building.
I wondered about that too. Concrete slumps, which is why forms are required when you pour anything that's going to be free-standing. For an extrusion-type printer you'd need some kind of binder that sets up and hardens sufficiently to hold the next layer in just a few minutes at the outside. D-Shape's printers don't appear to be designed for that (I'll be happy to be shown otherwise).