Why was Roman Concrete Forgotten during the Middle Ages?

Summary by Krater

This video explores the history, composition, and eventual decline of Roman concrete, detailing how its unique formula using pozzolana allowed for durable underwater structures and massive domes before falling out of use in late antiquity.

From the video

Answers: Why did the Romans stop using concrete?

• Roman concrete history and composition
• Pozzolana volcanic powder
• Ancient Roman architecture and building techniques
• Decline of Roman concrete in late antiquity

What it concludes

• Roman concrete was mixed with pozzolana, lime, and water, creating a strong mortar that could even set underwater due to a chemical reaction with seawater.
• Roman concrete was primarily used for rapid, low-cost building of walls and foundations until emperors like Severus and Celer used it to create monumental domes and vaults.
• Roman concrete fell out of use in late antiquity because buildings requiring its specific strengths were no longer constructed and building traditions shifted.
• In the eastern Roman Empire, concrete remained unpopular because local traditions favored brick and mortar construction.