What is special about the Pantheon's dome?
The Pantheon in Rome, completed around 125 AD, still has the largest unreinforced concrete dome in the world.
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Concrete Facts
Concrete facts and facts about concretes.
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How much concrete is in the Hoover Dam?
The Hoover Dam contains enough concrete to pave a two-lane highway from San Francisco to New York City.
How long would the Hoover Dam's concrete have taken to cool?
Without cooling pipes, the Hoover Dam's concrete would have taken about 125 years to cool and harden.
Why has Roman concrete lasted so long?
A 2023 MIT study found that Roman concrete can partly heal its own cracks, which helps explain why Roman buildings have lasted for thousands of years.