Opus caementicium uncovered within a characteristic Roman arch. In contrast to modern-day concrete structures, the concrete Utilized in Roman properties was typically covered with brick or stone. The Romans applied concrete thoroughly from 300 BC to AD 476.[18] In the Roman Empire, Roman concrete (or opus caementicium) was produced from https://bookmarkleader.com/story19795302/little-known-facts-about-concrete-reinforced-with-bamboo