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

My first thought is actually getting the corrosive substance onto enough of the concrete would be difficult

Yeah, if the concrete is 40' thick and they're only getting 10' of penetration with the explosives, then this isn't going to do much. But if it's 20' thick and they got through the first 12 with HE, the remaining 8 are going to have a lot of cracks to admit slow liquid death.

I have zero information on what the reinforcers are in the concrete, so shot in the dark is about right. Glass might be tough - unless you could deliver hydrofluoric acid effectively. Metals - we're not going to want to wait for iron to oxidize, looks like hydrogen embrittlement with HF again - so maybe that's the magic sauce. Nasty stuff, but that's what weapons manufacturers are good at handling and packaging: nasty stuff.

2000 lbs of HF poured on the surface isn't going to do much to the buried chamber, but 2000 lbs of HF delivered into the freshly stressed and heavily cracked concrete layer under all the dirt - that could be a problem for future use of the facility.

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.

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

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.

immediately

mediately

It is like a rifle vs. a cannon.

Yes it is functionally the same, but the "bullet" is much much larger.

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

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.”

Unfortunately (?) HF is a gas.

inste-edit: I know I'm being pedantic and a reasonable concentration of hydroflouric acid is what you were talking about.
There was an article somewhere about a 1 tonne spill on chlorine triflouride

They mean mixing in steel dust or nylon hair?

Hard to believe this is a recent enough thought.

rest of Tokio is mostly intact

and housing becomes much more accessible too when buildings are intact but their inhabitants have much shorter lives because of radiation

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

They mean mixing in steel dust or nylon hair?

Hard to believe this is a recent enough thought.

I doubt it's a recent thought, knowing civil engineers, they're absolute perverts when it comes to concrete.

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!

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

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.