Benchmarking Concrete for LEED

Just out of interest this paper provides a review of ultra high compressive strength mixes up to 200 MPa that you could put into the ZGF estimator, although there are likely to be some admixtures and mineral additions that might not be accounted for.

I am interested to see if there are carbon savings from using ultra high compressive strength mixes to optimize the structural design and reduce overall material use - in case any structural engineers are reading!