Which civilization first made widespread use of concrete as a building material?

Question

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The Romans were the first civilization to make widespread use of concrete as a building material. They used a combination of volcanic ash, lime, and seawater to create a strong and durable material that was used in the construction of buildings, bridges, and aqueducts. Some of these structures still stand today, attesting to the lasting power of Roman concrete.

Which Civilization First Made Widespread Use of Concrete as a Building