stone != concrete edit: we have a > 2,000 years old pyramid in Rome too, and it'... | Hacker News

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		peoplefromibiza on Jan 7, 2023 \| parent \| context \| favorite \| on: Why was Roman concrete so durable? stone != concrete edit: we have a > 2,000 years old pyramid in Rome too, and it's in perfect shape, because stone != concrete https://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/Ci...

ectopod on Jan 7, 2023 | [–]

What it is: https://en.m.wikipedia.org/wiki/Pyramid_of_Cestius

moloch-hai on Jan 7, 2023 | [–]

Funny, its perimeter vs. height approximates pi, rather than the originals' 2pi.

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