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In a First, America Dropped 30,000-Pound Bunker-Busters—But Iran’s Concrete May Be Unbreakable, Scientists Say (www.popularmechanics.com)
submitted 3 months ago by NoSpotOfGround@lemmy.world to c/technology@lemmy.world
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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.”

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[-] HappySkullsplitter@lemmy.world 1 points 3 months ago* (last edited 3 months ago)

Just one followup question: Who cares?

Edit:

Trump didn't give the order to specifically destroy the bunkers

Had that order been given they would have continuously bombed the site(s) until it/they was/were destroyed

Judging by the results of the strike the order seems to be very limited

[-] Kyrgizion@lemmy.world 1 points 3 months ago

I low key assume this means the next strike will be using tactical nukes. This is bad news folks.

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this post was submitted on 25 Jun 2025
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