Opus caementicium exposed in the attribute Roman arch. In contrast to modern-day concrete structures, the concrete Utilized in Roman buildings was commonly coated with brick or stone. The Romans applied concrete thoroughly from three hundred BC to AD 476.[18] Throughout the Roman Empire, Roman concrete (or opus caementicium) was comprised https://indexedbookmarks.com/story19693085/helping-the-others-realize-the-advantages-of-concrete-reinforced-with-rebar