Strength of 3D printing materials

Wow. I was watching something on modelling stress points last night.

@Tempestman interesting, does it assume a 1:1 sort of ratio of material? For example, I am going to print X cc’s of concrete vs pour X cc’s of concrete? And if it’s about efficiency, then wouldn’t expanding material to selectively reenforce high stress points (which I assume is doable with printing?) to save time be a better option than expanding time?

I know in my slicer tool I can add more support and material in some points than others, wouldn’t in fact make the deliverable stronger?

N.B.
I have no idea what I am talking about, so thinking out loud here.