Opus caementicium uncovered within a attribute Roman arch. In contrast to modern-day concrete structures, the concrete Employed in Roman buildings was normally covered with brick or stone. The Romans utilized concrete thoroughly from three hundred BC to AD 476.[18] Over the Roman Empire, Roman concrete (or opus caementicium) was created https://thegreatbookmark.com/story19803308/getting-my-concrete-reinforced-wire-to-work