Neighborhood of 100 3d-printed houses in Texas
 

Apparently, they cost $450,000 each: https://www.youtube.com/watch?v=Y-4S7cdo3tY

Those aren't 3D printed houses; four seconds in and you see a cloud of engineered roofing trusses.

It's a house with 3D printed walls.

Engineering Inch by Inch
The 'front door' (Embarcation Point) is three stories tall.

Why does the way concrete is poured reminds me rammed-earth?

They are both geo-polymers.

At least concrete usually takes less time to dry, while some colonial rammed earth buildings took more than 10 years to finish...

Concrete doesn't dry, it cures.

You can flood it all day long and it will still get hard, otherwise there wouldn't be so many structures in the lakes and oceans.

Indeed.


Of course. There is even some concrete that is better suited to structures in saltwater.

Saw this thought of freebeard for some reason:https://www.kartent.com/en/kartent.html

Cardboard tent. Bit of weatherproofing and good all year

KarTent - Carwash Test

They don't show it after it comes out of the carwash and dries out. The book Paper Houses suggested a half-dozen waterproofing treatments from Copal varnish (6 months) to ferrocement (forever).