Opus caementicium uncovered inside a characteristic Roman arch. In distinction to modern day concrete buildings, the concrete used in Roman structures was ordinarily lined with brick or stone. The Romans used concrete thoroughly from 300 BC to Advertisement 476.[eighteen] During the Roman Empire, Roman concrete (or opus caementicium) was made https://johnathandeczx.blog2freedom.com/35823532/not-known-details-about-concrete-reinforced-stone