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Concrete was used by the Romans over 2,000 years ago. And some of their buildings still beat modern construction.

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Romans used forms of concrete extensively by the 1st century BCE, often mixing lime with volcanic ash (pozzolana). Many structures have lasted ~2,000 years, partly because some mixes perform exceptionally well in marine environments.

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Concrete was used by the Romans over 2,000 years ago. And some of their buildings still beat modern construction. | SmartAss Facts