Opus caementicium exposed in a characteristic Roman arch. In contrast to contemporary concrete constructions, the concrete used in Roman buildings was ordinarily lined with brick or stone. The Romans made use of concrete thoroughly from 300 BC to Advert 476.[18] In the Roman Empire, Roman concrete (or opus caementicium) was https://moon-knight-creator72692.thenerdsblog.com/41669275/getting-my-concrete-reinforced-wire-to-work