Uses pumice in aggregate as aerated mass to lighten the concrete and also varies... | Hacker News

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		ggm on Jan 6, 2023 \| parent \| context \| favorite \| on: Why was Roman concrete so durable? Uses pumice in aggregate as aerated mass to lighten the concrete and also varies concrete thickness by height in the dome to reduce load

galaxyLogic on Jan 12, 2023 [–]

And the concrete self-heals with water

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