“Thanks for that. Just reading this article/explainer:”
Thanks for the link, what a MESS! The thing about water reaching rebar is that it will wick-along the rebar and damage a good length of it, even if only its end is exposed. It’s CRAZY to use a porous concrete with rebar!
By the way, the Roman Pantheon is nearly 2000 years old and was made with concrete that actually self-heals and no rebar (but then it starts at 6 feet thick). We’re still trying to figure out the recipe for their concrete!
We know how to make Roman concrete now. Long ago someone had the presence of mind to chip the recipe onto a stone and about 20 years or so someone found it. If I remember correctly the two magic ingredients are salt water and volcanic Ashe. It does have a different texture- sort of like wet clay.