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Trump Tower in Chicago.

NickD on Tue June 03, 2008 1:23 PM User is offline

Daughter said wow, 750 million bucks, well honey, with 465 condos for sale at an average price of 2.5 million dollars, Don will make 1,163 million bucks that should cover the cost of the building with a couple of bucks left over, plus he can make more renting out all those hotel rooms that he gets to keep.

Would would pay 2.5 million for a condo? Prestige, honey, you get to live in the Trump tower.

But what concerns me, is for how long, building is just as tall as the Sears Tower with a totally new concept in construction, adding five secret ingredients to concrete to make it stronger so the walls can be made thinner. Just using wire mesh and rebarb in the construction of this super tall building. Tried to find what these ingredients were, could only find about some kind of plasticzerer. Hope it's not the same plastic used for my weather stripping, after twenty years, all dried up and brittle, experiment with other types of rubber based materials to lower my heat bill.

Wasn't there anything learned about the World Trade Center with their angle brackets to support heavy concrete floors. Was this new material ever tested in smaller buildings? Couldn't find any history on that either. Maybe in twenty years, Chicago will have a big pile of power where this tower use to be.

What do you get for your 2.5 million bucks, well solid core doors and hardwood flooring. And in the better condos, a gas burning fireplace. Ha, I been slowly getting rid of the wall to wall carpets in my home but not because it is my wife's preference, mainly because hardwood floors are cheaper, and we have a real honest to god wood burning fireplace made with real brick from the basement clear passed the second floor. Suppose that Trump is not concerned how long that tower will last, just as long as he gets a couple of bucks in his pocket. Ha, wonder if that 2.5 million includes one parking space, they didn't say that.

So exactly what is plastic concrete, know that it contains, Portland cement, sand, water, and pea gravel, the rest of it, about a gallon per cubic yard, is secret.

bohica2xo on Wed June 04, 2008 2:27 PM User is offline

750 million in building costs is chump change in this town.

Project City Center is projected @ 9.2 Billion to complete. Not too bad for 18 Million square feet of construction. I can't tell if the Trump tower here in town used that snake oil concrete, but I doubt it. Trump will just go bankrupt & keep all his stuff if something tanks anyway.

B.

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"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

mk378 on Wed June 04, 2008 2:50 PM User is offline

Google is very helpful here. Plastic concrete contains, in addition to the traditional concrete ingredients, little rods of polyolefin plastic about 2 inches long. The exact composition of the plastic, like most plastics, seems to be a trade secret. Hopefully they do not contain a volatile plasticizer, which is what causes most age-related brittleness in consumer plastics especially PVC.

NickD on Wed June 04, 2008 3:22 PM User is offline

The contractor that pour my kids garage floor and basement used some kind of fiberglass strands about two inches long claming that rebarb and mesh are not needed with that stuff. New to me, I am from the old mesh and rebarb school, so I am wondering if what you looked up is the same thing.

I learned about the Trump Tower from watching Building it Bigger with that little nerdy architect guy and they showed mixing this stuff, looked like a gallon of milk when they were pouring it in. Maybe if Trump heard about fiberglass strands, he could save even more by getting rid of that little mesh and rebarb they were using.

Karl Hofmann on Wed June 04, 2008 4:15 PM User is offlineView users profile

Many years ago I used to work at a plant manufacturing GRC, Glass Reinforced Cement, It was used to make cattle drinking troughs, permanent formwork and cable trunking for the railways, it was very strong for its thickness but the down side was that it was discovered that the cement attacked the glass fibres, so the Fibres had to be given a protective coating. The GRC was sprayed on to moulds and formers. We did play with plastic fibres for a little while for casting, used all kinds of polimer additives to to minimise the required water content to give stronger products, but the addition of simple PVA does make cement and concrete very strong indeed..

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Never knock on deaths door... Ring the doorbell and run away, death really hates that!

NickD on Wed June 04, 2008 6:29 PM User is offline

NickD on Wed June 04, 2008 6:30 PM User is offline

Quote
but the addition of simple PVA does make cement and concrete very strong indeed..

Yeah, but does it bend without breaking?

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