3 ms·

>Concrete might look very different in 25-50 years. True more like it looked in 150 BC: https://en.wikipedia.org/wiki/Roman_concrete https://en.wikipedia.org/

by nix23 6y ago

>Concrete might look very different in 25-50 years. True more like it looked in 150 BC: https://en.wikipedia.org/wiki/Roman_concrete https://en.wikipedia.org/wiki/Roman_concrete