In a First, America Dropped 30,000-Pound Bunker-Busters—But Iran’s Concrete May Be Unbreakable, Scientists Say
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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.”
That concrete really isn't new and really isn't that special. There's a reason they built it under a mountain - because the mountain does what concrete can't.
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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.
Maybe the commenter was thinking of adobe.
And this tech goes way beyond merely "reinforced".
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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.”
Sounds to me like someone is trying to justify actually using a tactical, atomic bunker buster.
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Coreium.
We drop an overloading nuclear reactor on top of the complex, and let the radioactive core China-Syndrome itself straight through, rendering the entire area uninhabitable for thousands of years.
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Sounds to me like someone is trying to justify actually using a tactical, atomic bunker buster.
tactical
Lol, they're gonna do the strategic one next
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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.”
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.
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"Hey there, you sexy bomb... I can't stay away!"
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From this article it sounds very likely that the bunker buster attack failed.
The article is 3 years old
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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.
Consider who actually makes this decision, in this case. It's highly likely our intelligence assessment here is very accurate orr flat out denied by the dipshits actually making the call if it's not what they want to hear.
Like they did publicly. On this conflict. To the press.
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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.
Why would we bother with that level of analysis just to distract people from ICE raids?
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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.
Your comment is informative but now all I can hear in my head is Green Day’s “American Idiot”.
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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.”
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
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I love how unhinged random fan wikis sound without context. Here for instance: Bunker Buster, see also: Concrete Donkey and Buffalo of Lies
I hadn't clicked the link yet, but Concrete Donkey told me what it was immediately
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Blood of xenomorphs from the Alien movies
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Calling that pyramid age I think is a little disingenuous, they didn’t have 40,000 psi concrete back in those days.
Thats fair yeah
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tactical
Lol, they're gonna do the strategic one next
I never really got why tactical and strategic nukes are so wildly different. Aren't those words more or less synonyms?
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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?
Strategic = Hiroshima getting obliterated
Tactical = The Imperial Palace is obliterated, but rest of Tokyo is mostly intact.
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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?
Very much not.
Tactical means immediately useful. E.g. use against troops.
Strategical means mediately useful. E.g. use against infrastructure and production capacity. Also massively killing civilians. This is where most heinous war crimes live. -
I never really got why tactical and strategic nukes are so wildly different. Aren't those words more or less synonyms?
Generally yield and intention difference, strategic takes out cities, tactical takes out factories, military bases and compounds.
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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.
I prefer my mechanical stress calculations in millidynes per square kiloparsec thank you very much.
