Opus caementicium uncovered within a characteristic Roman arch. In contrast to fashionable concrete structures, the concrete Employed in Roman buildings was commonly covered with brick or stone. The Romans utilised concrete thoroughly from three hundred BC to AD 476.[18] Over the Roman Empire, Roman concrete (or opus caementicium) was created https://socialclubfm.com/story10433657/getting-my-concrete-reinforced-wire-to-work