Question

The Romans invented concrete in order to build huge stadiums and other buildings.

List three main ingredients in Roman concrete.

Answer 1

Answer:

Ancient Roman concrete was a mixture of lime mortar, aggregate, pozzolana, water, and stones, and was stronger than previously-used concretes.

Answer 2

Answer:

a pasty, hydrate lime; pozzolan ash from a nearby volcano; and a few pieces of fist-sized rock.

Explanation: