00:00This is one of the world's strongest and toughest concretes ever made.
00:03It's the same type of concrete used to build the Pentagon and nuclear power plants in the USA.
00:08But have you ever wondered, why is this concrete made to be so extreme?
00:11Let's find out.
00:12Unlike normal concrete that uses regular sand and gravel,
00:15this special mix includes steel fibres that are thinner than a strand of hair,
00:19just 0.2 millimetres wide.
00:22Because of that, this concrete can handle up to 20,000 psi of pressure,
00:26while regular concrete cracks at just 5,000 psi.
00:30That's why it's used in the most dangerous and high security structures on Earth.
00:33Have you ever seen this kind of super concrete being used before?
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