Hi Prateek,
Have you use the ZGF’s Concrete LCA Tool Update Version 3.0., contact @baha.sadreddin , he should be able to provide a copy of the tool to you. You should be able to do 8000 psi mixes although I have never used it for that strength.
I have used the EC3 tool to find mixes within my region for the specific strength, the issue is that you normally don’t have the formula for the mix. I have contacted some concrete producers in my area to request the SCMs in the mix, but that is pretty much it, I don’t have anything else such as W/C ratios. But I have used the EC3 Tool to give a max threshold based on the conservative value for the area.
I will a try to the ZGF calculator and see how close you get to the conservative value from the EC3 Tool.
Best,
Victoria