Opus caementicium uncovered in a characteristic Roman arch. In distinction to contemporary concrete structures, the concrete used in Roman structures was generally included with brick or stone. The Romans used concrete extensively from 300 BC to Advertisement 476.[eighteen] Throughout the Roman Empire, Roman concrete (or opus caementicium) was made from https://juliusfjihg.gynoblog.com/34887349/getting-my-concrete-reinforced-wire-to-work