Quote:
Originally Posted by john70t
Modern concrete is lightweight and porous allowing for moisture and salt penetration
-It is usually not sealed externally afterwards, especially on top
-Rebar is often undersized, not welded, is round and does not grip, and doesn't have an anti-oxidant composition such as brass or chromium
-Designers love to create flamboyant looks such as large unsupported balconies and complete walls of uninterrupted glass. (cring)
I wonder what building practices can be upgraded to prevent spalling, such as rubberizers or plasticizers or natural epoxies in the mix which would prevent air penetration.
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You should just stop... Its quite apparent that your knowledge of building design and practices and materials usage is limited.
This is a great totally uniformed and untrue statement:
Quote:
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Rebar is often undersized, not welded, is round and does not grip, and doesn't have an anti-oxidant composition such as brass or chromium
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I'll just use Wiki... as I can't be bothered to open my ACI or ASTM references..
A Primer on Rebar
I can go on about fiber reinforced concrete, various admixtures, plasticizers, retarders.. waterproofing agents etc..
This building was designed following the building codes that existed then..
Whether it was built that way is questionable.... Of course contractors buy materials that meet standards, for a little as they can..
Then there is actually building the structure to plan and spec..
I doubt there was any third party testing and oversight all those years ago..
And I bet there has been zero preventive maintenance , or even inspections since that building got its CO