General comments/chat, page-41953

We've discussed this at length before here but ill simply say the flyash isnt going to run out anytime soon there is a gazillion tons of it buried at every coal fired power plant. It will last many many generations.

"Add a small amount and reduce cement while improving properties"
Notice you missed the important factor of cost. You can do all the above with materials already at the plant at a lower cost with no extra overhead.

"B80 spec in NSW is 25%. You can't just add flyash and drop cement"
You can also not drop in super clay lol

We can make perfect concrete right now that lasts 1000 years with perfect properties but its not economically viable ....

You know a little about concrete ill grant you but i've forgotten more than you know.