Using Concrete to build space ships...

> > Yes iron refining involves a lot more energy and mass
> > than concrete for sure. The trick is that iron is
> > useful for a lot of items concrete isn't so you would
> > need iron production facilities regardless.
>
>Plus, I've heard concrete advocates recommend prestressed steel cables
>inside the concrete structures.

Remember that iron is not yet steel... The types of steel needed will
require different alloying material in varying amounts, plus a facility to
due said alloying.

Val

>
>Regards,
>
>Mike Combs

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