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.”

  • Darrell_Winfield@lemmy.world
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    5 days ago

    Holy nothing burger, Batman!

    First off, this article is from 2022, re-released to farm clicks from the current hype cycle.

    Secondly, this is conjecture on top of conjecture. They discuss that we can’t know the current damage from satellite, and Iran down plays the damage. Then they go on to say “concrete is strong and can be stronger”.

    Articles like this annoy me. It’s all based on lots of unsubstantiated claims, and then one guy’s theoretical research. We don’t know the strength of the bombs. We don’t know the strength of Iran’s bunkers. We don’t know how much damage was done. None of this has changed. I doubt we’ll ever really know. But throw whatever political spin on it you want, and now you’ve got a click worthy news article.

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

      • Darrell_Winfield@lemmy.world
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        5 days ago

        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.

        • Coyote_sly@lemmy.world
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          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.

  • skisnow@lemmy.ca
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    5 days ago

    I suspect the world would be safer if everyone just let Trump think he won.

    • x00z@lemmy.world
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      That’s impossible. “Make America Great Again” is a slogan that he can only abuse as long as there are problems. If he wants to stay in power it’s in his best interest to create problems. It’s what fascists dictators have been doing since forever. Even if there are no problems they will point towards something and make you think it is a problem, so they can market themselves as the solution. If he would “win” he would lose his power, which is obviously the opposite of what somebody like Trump wants.

      • noughtnaut@lemmy.world
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        4 days ago

        That is depressingly insightful. See also: the internal war on everyone who isn’t a middle-aged white cis het man (and even some of them, too). Just negativity all around.

        What really brings me down it’s the certainty that even if that is guy was suddenly not there anymore, there is a whole gaggle of like folk ready to continue that same rhetoric. How do you even dig yourselves out of that?

        • x00z@lemmy.world
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          That is depressingly insightful. See also: the internal war on everyone who isn’t a middle-aged white cis het man (and even some of them, too). Just negativity all around.

          Yes. Separating the people is an extremely strong tool in the authoritarian handbook. It is such a strong tool that the things it accomplishes are too much to list here. There are a lot of books on the matter. I think it’s even explained in some of the CIA books.

          What really brings me down it’s the certainty that even if that is guy was suddenly not there anymore, there is a whole gaggle of like folk ready to continue that same rhetoric. How do you even dig yourselves out of that?

          This is not completely correct. People fighting back against their oppressors sends an extremely strong message. And it even goes both way. For example, the attack on the USA Capitol of January 6th gave these Magazis a lot of power because they saw unity in their oppression.

          The good thing is that there’s always more good people than bad.

  • someguy3@lemmy.world
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    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.

  • Buffalox@lemmy.world
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    From this article it sounds very likely that the bunker buster attack failed.

      • Buffalox@lemmy.world
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        5 days ago

        So Iran knew EXACTLY how strong they needed to make their defenses!
        Pretty stupid of the American military to give that info to a game developer, that would obviously use it.

      • dalekcaan@lemm.ee
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        5 days ago

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

    • Darrell_Winfield@lemmy.world
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      That’s what they want you to think, but we have no evidence to either direction. And I doubt we will ever have a definitive answer.

  • Ledericas@lemm.ee
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    If it’s reinforced steel concrete, it would be much harder to bunker bust.

      • Regrettable_incident@lemmy.world
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        IIRC this type of thing isn’t new - there was research into the possibility of making ships out of ice mixed with sawdust in WWII.

        • prettybunnys@sh.itjust.works
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          It also wasn’t and isn’t that crazy of an idea.

          It’s strong AF, buoyant, and you can repair it at sea using the ocean around you.

          You just need a reliable way to keep it cool.

        • OrteilGenou@lemmy.world
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          5 days ago

          How is the fleet holding up?

          We almost made it this time!

          Oh well, let’s freeze another fleet, wait for January and try again

          • Regrettable_incident@lemmy.world
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            I think that was kinda the idea - war production meant steel was in great demand, and this seemed like a really cheap way to make ships. I wouldn’t want to try sailing one round the Caribbean, but they might have been okay in the north sea, for example. They didn’t work out though, can’t recall why but it’s not impossible that melting may have been a factor!

            • SpermHowitzer@sh.itjust.works
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              The idea was to build giant floating barges in the mid North Atlantic for sub hunting escort aircraft to refuel halfway across. The escort aircraft at the time couldn’t stay with the convoys the whole way, leaving a stretch in the mid Atlantic where they were vulnerable. An ice runway would allow aircraft to cover the convoy for the entire passage, and in the North Atlantic would last months (if not longer) before melting.

    • Treczoks@lemmy.world
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      5 days ago

      Fiberglass, carbon fibers, or small steel wires. They don’t need to be long, the snippets are only a few centimeters in the video I have seen.

  • AJ1@lemmy.ca
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    5 days ago

    I sure would like to read this article, it seems fascinating, but it’s paywalled.

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