Competitor?, page-15

They do use calcium carbonate in the cement mixture to make the concrete set quicker, but in cracks it may fill the crack but the fact that the concrete cracked in the first place is what makes it less stronger, I don't see how filling the crack with calcium carbonate would increase it's strength again, aren't Edencrete using some sort of mixture that uses similar to what the Romans did and add CNT's into that, the name escapes me now porzalate or something along those lines? it will be used in marine concrete from what I had heard?