Opus caementicium uncovered within a attribute Roman arch. In contrast to fashionable concrete constructions, the concrete Employed in Roman buildings was usually protected with brick or stone. The Romans employed concrete thoroughly from 300 BC to Advert 476.[eighteen] Through the Roman Empire, Roman concrete (or opus caementicium) was comprised of https://rankuppages.com/story4788517/little-known-facts-about-concrete-reinforced-stone