Opus caementicium exposed inside a attribute Roman arch. In distinction to present day concrete buildings, the concrete Utilized in Roman buildings was normally coated with brick or stone. The Romans made use of concrete extensively from 300 BC to Advert 476.[eighteen] Over the Roman Empire, Roman concrete (or opus caementicium) https://pantip82479.iyublog.com/34881246/5-easy-facts-about-concrete-reinforced-house-described