Factorio Forums

I don't really care for the vanilla concrete recipe in game requiring stone bricks and iron ore. The few mods posted do help some (i.e. Sane Conrete at least has the rebar). I found this article on the web and thought it might be a good read for you sadistic bastaids who like to balance the game with your awesome mods. Maybe someone will give us a new twist to make concrete in the future. I haven't played any of the big overhaul mods yet so it might be in there already.

Anywho.... enjoy.

http://www.buildeazy.com/newplans/eazylist/cement.html

Factorio got the recipe mostly right, considering the result is not reinforced concrete but concrete paver.
Iron oxide is a potential additive to cement for sintering.
Rebar frames are usually not used when producing concrete paver.