Why Modern Concrete Fails (But Rome’s Didn’t) #loominglegacies #travel #ancientrelics

Ajouté : 2026-06-01

[00:00:00]Modern concrete degrades and cracks within decades, yet ancient Roman harbors built in 27 BC are still standing completely intact. The secret?

[00:00:12]The Romans mixed volcanic ash into their concrete. When a crack forms, seawater seeps inside, dissolves the lime, and recrystallizes it.

[00:00:23]The concrete literally heals itself.

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