[ExI] Rebuild Los Angeles With Ultra High Strength Concrete

[Darin Sunley]

At last! We can build the Caves of Steel from Isaac Asimov's seminal
science fiction novel, "The Caves of Steel are Awful". :D

On Sun, Jan 12, 2025 at 1:42 PM BillK via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

> Rebuild Los Angeles With Ultra High Strength Concrete and UHPC Domes
> Where Possible
> January 12, 2025 by Brian Wang
>
> <
> https://www.nextbigfuture.com/2025/01/rebuild-los-angeles-with-ultra-high-strength-concrete-and-uhpc-domes-where-possible.html
> >
> Quotes:
> Ultra-high performance concrete (UHPC) is an enhanced fibrous and
> cementitious concrete with high compressive strength (120–250 MPa)
> particle packing density (0.825–0.855, tensile strength (15–20 MPa)
> and extraordinary durability. UHPC has 300 times the ductility and
> energy absorption of high performance concrete (HPC) and three to
> sixteen times the compressive strength of regular concrete. About $500
> million of the billions spent on the Freedom Tower was the UHPC
> concrete. It has stronger material than the old Minute Man nuclear
> silos. The large amount of UHPC has moved it into the mainstream
> higher end option for skyscrapers, bridges and roads.
>
> The Cost to Make a Building Fire Resistant Would be More Than
> Committing to Ultra-high Strength Concrete for Better Protection.
> -------------------
>
> Sounds like a good idea.  Is it feasible?
>
> BillK
>
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