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 ...
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Concrete basics for Beginners from top to bottom, ground prep, rebar, sealing & protecting
YouTube
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YouTubeTechnical Civil
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