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Old March 16th, 2015, 12:07 PM   #10701
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Thanks for the exact calculation, Kanto. I was just using it as a ballpark. But that does make sense.
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Old March 16th, 2015, 02:28 PM   #10702
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Quote:
Originally Posted by Kanto View Post
To be precise 85 MPa is 12 328 psi. That is some very strong concrete, although not the strongest in the world. The currently strongest concrete in the world is in 432 Park Avenue and the new World Trade Center, both in New York City, which has 14 000 psi. The title will however soon be overtaken by the 433 meter Steinway Tower, which is in New York too. It will use 16 000 psi concrete
Nice to know info.
So, do you know (for comparison) the figures of concrete used in, for example, the Hoover Dam and what was used in the old WTC towers ?
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Old March 16th, 2015, 02:49 PM   #10703
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Quote:
Originally Posted by Kanto View Post
To be precise 85 MPa is 12 328 psi. That is some very strong concrete, although not the strongest in the world. The currently strongest concrete in the world is in 432 Park Avenue and the new World Trade Center, both in New York City, which has 14 000 psi. The title will however soon be overtaken by the 433 meter Steinway Tower, which is in New York too. It will use 16 000 psi concrete
Strongest in the world on what scale? I had a lecture on concrete technology a couple years ago, and the professor said that while the european "C" classification of concrete stops at C100 (Yield strength of 100 MPa for a standardized cylinder test), it's fully possible to make concrete that's twice as strong as that.

...though I guess it stops being economical after a certain point...
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Old March 16th, 2015, 03:23 PM   #10704
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As per the latest pics posted in this forum .. which level did the reach??
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Old March 16th, 2015, 03:33 PM   #10705
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Thank you everybody for updates.
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Old March 16th, 2015, 05:18 PM   #10706
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As per the latest pics posted in this forum .. which level did the reach??
Should be at level 12 at about 50m now
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Old March 16th, 2015, 06:05 PM   #10707
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...
thanks for the explanation. That was helpful
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Old March 16th, 2015, 07:48 PM   #10708
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Quote:
Originally Posted by Kyll.Ing. View Post
Strongest in the world on what scale? I had a lecture on concrete technology a couple years ago, and the professor said that while the european "C" classification of concrete stops at C100 (Yield strength of 100 MPa for a standardized cylinder test), it's fully possible to make concrete that's twice as strong as that.

...though I guess it stops being economical after a certain point...
I believe he was referring to the strongest concrete used in a structure silly anyplace in the world, not the strongest concrete theoretically possible! As you said, making the strongest possible concrete may not be economically feasible for a project. The silly thing about economics is that it gets in the way of engineering and architecture many times!
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Old March 16th, 2015, 08:00 PM   #10709
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Quote:
Originally Posted by Kanto View Post
To be precise 85 MPa is 12 328 psi. That is some very strong concrete, although not the strongest in the world. The currently strongest concrete in the world is in 432 Park Avenue and the new World Trade Center, both in New York City, which has 14 000 psi. The title will however soon be overtaken by the 433 meter Steinway Tower, which is in New York too. It will use 16 000 psi concrete
2 Union Square in Seattle used 20,000psi (138MPa)concrete.

http://books.google.com/books?id=Yfa...ncrete&f=false
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Old March 16th, 2015, 09:12 PM   #10710
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How about over 29,000 psi fellaz? Year 1995 has seen a UHSC mixture that exceeded 29k (200 MPa, compressive). A mile-high thing? Nowadays, no problem! Gimme two. Kilometers.
Eh, enjoy the paper:
http://www.nrmca.org/ctf/2010CSCProc...%204-14-10.pdf
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Old March 16th, 2015, 10:30 PM   #10711
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for new mexico that can be expected lol. Although there are countries where the sand type will not allow the development of Ultra High Strength Concrete.
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Old March 17th, 2015, 03:20 AM   #10712
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16.3.2015

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Old March 17th, 2015, 11:51 AM   #10713
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Quote:
Originally Posted by CopyLeft View Post
How about over 29,000 psi fellaz? Year 1995 has seen a UHSC mixture that exceeded 29k (200 MPa, compressive). A mile-high thing? Nowadays, no problem! Gimme two. Kilometers.
Eh, enjoy the paper:
http://www.nrmca.org/ctf/2010CSCProc...%204-14-10.pdf
Awesome, very good stuff to read about. It really explains everything well. Thank you!!

I dont see any buildings or the freeways listed on that paper - I know that in LA and surrounding areas, there has to be some seriously high-strength concrete in use as well - Especially with the US Bank tower, and the new Wilshire Grand that is currently sprouting. I am now very curious about what kind of concrete they went for, Ill have to check this.
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Old March 17th, 2015, 02:12 PM   #10714
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any suggestions about car parking?
there are no underground floors right?
Sorry guys,
maybe my questions is seen as stupid or useless, but i always wonder about this giant buildings put to the sand without any underground levels.
There will be alot of people working or living in this tower, not to forget supply chain.
I guess they dont want to walk hundreds of meters to reach the building...
Anybody knows how the did it in Dubai?
Maybe they build a giant car tower beside of it haha. This is a funny idea but i wouldnt wonder if they really make it come true...
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Old March 17th, 2015, 02:24 PM   #10715
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17 03 2015



































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Old March 17th, 2015, 02:35 PM   #10716
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Great update!

Looks quite gigantic already
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Old March 17th, 2015, 03:04 PM   #10717
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amazing update
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Old March 17th, 2015, 04:13 PM   #10718
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No pics

For me, it's just broken links!

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Originally Posted by alsaif2012 View Post
17 03 2015



































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Old March 17th, 2015, 04:33 PM   #10719
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Old March 17th, 2015, 04:36 PM   #10720
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Quote:
Originally Posted by ovaron View Post
Sorry guys,
maybe my questions is seen as stupid or useless, but i always wonder about this giant buildings put to the sand without any underground levels.
There will be alot of people working or living in this tower, not to forget supply chain.
I guess they dont want to walk hundreds of meters to reach the building...
Anybody knows how the did it in Dubai?
Maybe they build a giant car tower beside of it haha. This is a funny idea but i wouldnt wonder if they really make it come true...
Under the podium around the tower .... yet to start being build. Same in Burj Khalifa
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