Opus caementicium exposed in the attribute Roman arch. In contrast to fashionable concrete structures, the concrete Utilized in Roman properties was usually protected with brick or stone. The Romans applied concrete extensively from three hundred BC to AD 476.[eighteen] Over the Roman Empire, Roman concrete (or opus caementicium) was made https://bookmarkforce.com/story19858045/indicators-on-reinforced-concrete-meaning-you-should-know