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The Greeks on the other hand were using cement by 600 B.C., when Greek builders discovered a natural pozzolan that developed hydraulic properties when mixed with lime.
It was the Romans, however, who used cement in large amounts, for huge building projects. Early Roman use of cement dates back to around 300 B.C. Since that period, the Romans steadily improved their concrete technology, they also gave it its name. The word "concrete" comes from the Latin 'concretus', meaning "grown together" or "compounded".
Roman concrete structures still stand today. Both the Colosseum (complete in 82 A.D.) and the Pantheon (completed in 128 A.D.) contain large amounts of concrete. The Basilica of Constantine and the foundations of the Forum buildings also were constructed of concrete. Since Roman cement has been so well studied, it will give us a basis for understanding the issues that are important in investigating Nabataean cement.
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