Ferrock: A Stronger, Greener Alternative to Concrete?
This reads like an advert. The whole "carbon-negative" thing relies on the assumption that steel dust is a waste product, which seems highly dubious to me. Steel is commonly recycled, including steel in very small pieces such as machining chips. It's hard to believe that anybody producing steel dust in quantities sufficient for use as construction material would just throw it away. The fair comparison would include the energy needed for steel making, which needs even higher temperatures than the "staggering 2,800 degrees Fahrenheit" needed to make cement.