Why Roman Concrete Won’t Die 🏛️

インデックス作成: 2026-05-16

[00:00:00]Roman concrete survived underwater for 2,000 years. Modern concrete starts cracking within just decades.

[00:00:07]Researchers opened an ancient Roman harbor wall. Inside, they discovered something engineers couldn't explain.

[00:00:14]Seawater was [music] actually making the concrete stronger. The secret came from volcanic ash near Vesuvius. Watch the related video for the full mystery.