Or that the concrete is stronger... If you need strong concrete, then this might be your answer.

Yes, that's the main point, the stronger concrete. If you make stronger concrete it will last longer and you thus will need less of it in the long run.

Concrete production is very bad for environment, so the less we need to make the better.

And Australia: know for insane coffee consumption (has to be freshly ground!) and appartments with “concrete cancer” although that may not be solved by this.