this post was submitted on 04 Sep 2024
106 points (92.1% liked)
Futurology
1670 readers
157 users here now
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
From what I've ready, the concrete recipe is the hard part.
Yup, it needs to dry fast enough for the next layer, but not so fast it makes a clog, and it needs to flow in just the right way you can predictably extrude a layer on. And be cheap-ish.
Of course, you still have to add a lot of non-structural components, like the other user said, and if it needs to take significant loads you also need to add reinforcement somehow, since concrete is weak under tension.
You also need to add insulation and then do something to hide the ugly layer lines.