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Old June 3rd, 2009, 08:48 AM   #21
royale_013
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before i answer, is someone a structural engineer here? coz he would answer this question more appropriately.

in my opinion, both of them are best, because you must use them both for high rise construction. both of the materials have weakest and strength. say steel which is has high tensile strength and weak on compression. concrete in a way is weak in tensile but high in compression. combining both their strength and weakest you create a forminable material which is very strong.

therefore, both material must be use on construction.
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Old June 5th, 2009, 03:15 AM   #22
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its not right to say that steel is weak in compression, its very strong... more so than than concrete is strong in tension...which is the reason there is reinforcing in concrete structures...
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Old August 2nd, 2011, 07:49 AM   #23
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(thread bump)

Can recycled concrete or steel from a deceased building be stronger when it is incorporated into the structural frame of a new building?
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Old September 9th, 2011, 03:11 PM   #24
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I was under the impression that steel was a cheaper material, in the past I've dealt with prefab building structures where the structure was brought to the job site in pieces and assembled by a construction crew there. To my understanding skyscrapers are assembled in the same way, I'm not sure about the concrete building procedure though.
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Old September 24th, 2011, 06:58 PM   #25
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Quote:
Originally Posted by AltinD View Post
Concrete is liable to rust? Do you even know what "rust" mean?
I think he meant the steel rebar which is used to support the concrete is liable to rust which is true if it is left exposed to the elements.
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Old October 1st, 2011, 11:38 PM   #26
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What about carbon nanotube reinforced concrete? How much stronger is it compared to steel or classic reinforced concrete?
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Old October 2nd, 2011, 01:02 AM   #27
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Quote:
Originally Posted by Jim856796 View Post
(thread bump)

Can recycled concrete or steel from a deceased building be stronger when it is incorporated into the structural frame of a new building?
If you still read this thread.

Old concrete isn't recycled into new buildings. It can't be used as a raw material for new concrete.

And the old steel is just melted down and used again for new steel. It doesn't have any influence on the strength of the steel the building.
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Old October 2nd, 2011, 10:47 AM   #28
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What's the deal? You (Japan) don't even build skyscrapers made of reinforced concrete anymore, probably cause you are in a seismic zone.
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