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The history of concrete
8:04
YouTubeHistory Class
The history of concrete
Here I presented a timeline of the invention and the use of concrete. Concrete-like materials were used since 6500 B.C. by the Nabataea traders, but the earliest large-scale users of concrete technology were the ancient Romans. During the Roman Empire, Roman concrete (or opus caementicium) was made from quicklime, pozzolana and an aggregate of ...
已浏览 2.8万 次2020年4月10日
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