In Brazil we have a floor finish named Burnt Cement (that doesn't involve burning). Here is a description of the process
In summary, you use a mix of cement and pigment (sometimes marble powder too) sprinkled over fresh concrete floor (1 part cement and 3 parts sand), and then use a steel float to spread it. It can simply color, or have a stained effect.
What is this called in English?
Also, how can I properly execute this technique?
EDIT: From what I discovered, I think that is called dry-shake. In US people seem to buy a ready made compound to use, where in Brazil we mix cement and pigment (sometimes marble or limestone powder too) to make the same effect. If that is correct, I need to find some instructions on how to execute this (a video showing the effect would be even better).