Opus caementicium uncovered in the attribute Roman arch. In contrast to modern concrete structures, the concrete used in Roman structures was normally included with brick or stone. The Romans used concrete extensively from three hundred BC to Advert 476.[18] Through the Roman Empire, Roman concrete (or opus caementicium) was produced https://aikidohistory71481.blogitright.com/35957714/getting-my-concrete-reinforced-wire-to-work