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Salamendacious OP ,
@Salamendacious@lemmy.world avatar

I’ve heard lots of reasons. One was that the Romans used volcanic ash, which has some kind of special structure that maked it durable. I’ve also heard that it had to do with using salt water. Obviously not using rebar is important to longevity. The article talks about the lime chunks in the Roman section. I’m kind of a sucker for any article about Roman history though.

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