On that note, i recall reading about a British project to produce quick rise shelters. They were basically a inflatable tent with cement impregnated outer canvas.
Roll out, inflate, soak in water, and wait for it to harden before releasing the pressure.
And such a gluing agent would be cement. Concrete is really nothing more than cement mixed with sand or gravel. The farm i grew up on had a barn where the foundation was nothing more than cement and small rocks from the land. It was built up like a layer cake. One spread of cement, then a layer of rock, repeated until desired height.
> A Concrete Canvas shelter would cost 15,000 to 20,000 pounds, in the U.K., for a one-off ($23,000 to $30,000), but the price steps down if you are buying volumes.
My guess is that they're not interested in dealing with small-volume customers, and so for large volumes the prices descend to a much saner price. "Look at how much your government/military/refuge 'saves' when you buy 1000 of these!"...
Cement + sand is very different from cement + gravel + sand, and even then, the result varies widely depending on what kinds of gravel and sand you mix with the cement.
Roll out, inflate, soak in water, and wait for it to harden before releasing the pressure.
And such a gluing agent would be cement. Concrete is really nothing more than cement mixed with sand or gravel. The farm i grew up on had a barn where the foundation was nothing more than cement and small rocks from the land. It was built up like a layer cake. One spread of cement, then a layer of rock, repeated until desired height.