The dexpan is not a huge concrete structure, it's just a cylinder the size of th... | Hacker News

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		masklinn on Jan 6, 2023 \| parent \| context \| favorite \| on: Why was Roman concrete so durable? The dexpan is not a huge concrete structure, it's just a cylinder the size of the hole it was poured in.

hinkley on Jan 6, 2023 [–]

Oh, I see, just a bore hole and hydraulic concrete. Sort of like the metal shims you see used in pre-industrial stoneworking.

I was picturing pouring it into a void for some reason.

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