There's also the fact that the majority of Iran's nuclear facilities were built before UHPC, the concrete discussed in the article, was available!

I thought we do know the depth of the bunkers though. And that American bombs can’t go that deep, even multiple of them

Previously, a yield strength of 5,000 pounds per square inch (psi) was enough for concrete to be rated as “high strength,” with the best going up to 10,000 psi. The new UHPC can withstand 40,000 psi or more.

The greater strength is achieved by turning concrete into a composite material with the addition of steel or other fibers. These fibers hold the concrete together and prevent cracks from spreading throughout it, negating the brittleness. “Instead of getting a few large cracks in a concrete panel, you get lots of smaller cracks,” says Barnett. “The fibers give it more fracture energy.”

Egyptians stacked blocks of stone to build the pyramids.

Roman concrete was impressively strong.

Neither of them had steel-reinforced concrete.

Neither did Gothic cathedrals, which is why they needed flying buttresses.

Reinforced concrete as we know it today is a 19th century innovation, as I understand it.

Reinforced concrete - Wikipedia

(en.wikipedia.org)

Maybe the commenter was thinking of adobe.

Previously, a yield strength of 5,000 pounds per square inch (psi) was enough for concrete to be rated as “high strength,” with the best going up to 10,000 psi. The new UHPC can withstand 40,000 psi or more.

The greater strength is achieved by turning concrete into a composite material with the addition of steel or other fibers. These fibers hold the concrete together and prevent cracks from spreading throughout it, negating the brittleness. “Instead of getting a few large cracks in a concrete panel, you get lots of smaller cracks,” says Barnett. “The fibers give it more fracture energy.”

Sounds to me like someone is trying to justify actually using a tactical, atomic bunker buster.

Previously, a yield strength of 5,000 pounds per square inch (psi) was enough for concrete to be rated as “high strength,” with the best going up to 10,000 psi. The new UHPC can withstand 40,000 psi or more.

The greater strength is achieved by turning concrete into a composite material with the addition of steel or other fibers. These fibers hold the concrete together and prevent cracks from spreading throughout it, negating the brittleness. “Instead of getting a few large cracks in a concrete panel, you get lots of smaller cracks,” says Barnett. “The fibers give it more fracture energy.”

I can't speak to that aspect. But I firmly believe that if our military planned and carried out this strike, then we had very good evidence that their bunkers were at a depth these ordinance could reach.

I can't speak to that aspect. But I firmly believe that if our military planned and carried out this strike, then we had very good evidence that their bunkers were at a depth these ordinance could reach.

Giving the yield strength in psi is the most pointless thing ever. Every single engineer would use metric Pa so its clearly a conversion for the average american idiot but the average American idiot has no idea what yield strength is.

Previously, a yield strength of 5,000 pounds per square inch (psi) was enough for concrete to be rated as “high strength,” with the best going up to 10,000 psi. The new UHPC can withstand 40,000 psi or more.

The greater strength is achieved by turning concrete into a composite material with the addition of steel or other fibers. These fibers hold the concrete together and prevent cracks from spreading throughout it, negating the brittleness. “Instead of getting a few large cracks in a concrete panel, you get lots of smaller cracks,” says Barnett. “The fibers give it more fracture energy.”

I love how unhinged random fan wikis sound without context. Here for instance: Bunker Buster, see also: Concrete Donkey and Buffalo of Lies

Calling that pyramid age I think is a little disingenuous, they didn’t have 40,000 psi concrete back in those days.

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I never really got why tactical and strategic nukes are so wildly different. Aren't those words more or less synonyms?

I never really got why tactical and strategic nukes are so wildly different. Aren't those words more or less synonyms?