Great comments from everyone thanks!
What I think will get general contractors/clients on board with low carbon mixes is a table similar to what I posted originally with indicative costs and structural consequences. It would be great to have a concrete supplier do this for a range mixes (if it hasn’t already been done). Has anyone done anything like this or know a good (and willing) contact who would be interested in this kind of study?
@baha.sadreddin - I’ve actually been sent the ZGF concrete LCA tool (working on a project with you). It’s certainly interesting but for the moment I was more looking at the implications in terms of cost and curing times rather than the carbon side of things as they are the main hurdles for contractors adopting alt mixes.