Don’t forget that there was a slight survivorship bias. You of course can only test the concrete of still standing building and ruins, meaning that the vast majority of buildings that were weaker collapsed centuries ago.
I vaguely remember that the problem had something to do with the water people were using. Modern recreations weren’t accounting for the saltiness of the seawater or something. Don’t quote me on this
I forget but isn’t it like Roman concrete was super durable or something? Why was that? Does anyone actually know or is it a mystery to this day?
Don’t forget that there was a slight survivorship bias. You of course can only test the concrete of still standing building and ruins, meaning that the vast majority of buildings that were weaker collapsed centuries ago.
Volcanic ash
I vaguely remember that the problem had something to do with the water people were using. Modern recreations weren’t accounting for the saltiness of the seawater or something. Don’t quote me on this
https://news.mit.edu/2023/roman-concrete-durability-lime-casts-0106