Opus caementicium uncovered in a attribute Roman arch. In distinction to present day concrete buildings, the concrete used in Roman structures was ordinarily lined with brick or stone. The Romans used concrete extensively from 300 BC to Advertisement 476.[eighteen] Throughout the Roman Empire, Roman concrete (or opus caementicium) was comprised https://johnnyaefdc.targetblogs.com/36255231/the-fact-about-concrete-reinforced-steel-that-no-one-is-suggesting