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In order to cause concrete and steel to turn to micron-sized dust particles at Ground Zero as presented by Dr. Thomas Cahill, UC Davis Delta Group, the speed of sound must be reached in those items. Dr. Cahill is one of the world’s premier atmospheric physicists.
The speed of sound for concrete is 3200-3600mps (meters per second) and for steel the speed of sound is 6100mps.[1] Based on statements by Dr. Stephen Jones he estimates the velocity for his aluminum and iron oxide energetic compound in a silica substrate at 300mps.
According to Lawrence Livermore Laboratories the maximum velocity for an energetic compound made of iron oxide and aluminum in a silica substrate is 895mps.
Nano thermite is an incendiary. Explosives are classified as having velocities exceeding 3000mps. The incendiary nanothermite allegedly found by Dr. Stephen Jones is incapable of turning any component of the steel structured Twin Towers or the cement to micron sized particles or what is commonly referred to in scientific circles as ‘very fine particles’, as we all saw on 911 and as Dr. Thomas Cahill outlines.
Originally posted by Consequence
Are you drunk?
concrete is actually quite fragile and crumbles if not used right. A collapsing building is such a case.
Originally posted by hdutton
Could you discribe to me the formulation for the concrete which you have used in constructing floor slabs for highrise buildings?
Of those on which I poured concrete, we used a mix which was rated at 3000 lb/in. This is normally enough for high traffic areas and stands up well for most general uses.
I would just like to know if a lighter mix could be used.
Again, what I wanted to say is that when concrete cracks, it crumbles, and things get quite dusty. It is a clever way of spreading "truth" with "how fast does a slab of concrete need to fly to get dustified by air resistance". But that question is the wrong question to ask.
Originally posted by hdutton
reply to post by Consequence
Again, what I wanted to say is that when concrete cracks, it crumbles, and things get quite dusty. It is a clever way of spreading "truth" with "how fast does a slab of concrete need to fly to get dustified by air resistance". But that question is the wrong question to ask.
The best way to answer this question may be to imagine concrete as a man made rock, which it is.
How far would a rock fall through the air before it is "dustfied by air resistance"?
Well, the answer to this is ... some where close to forever.
I have never seen it happen and I don't think anyone else has.
Originally posted by Varemia
This doesn't even make sense. We can physically see that they are not reaching the speed of sound, and that wouldn't make steel disintegrate anyway! In order to disintegrate matter, you'd need a massive source of energy. Since the ground crews were able to recover just about all the steel, I'd have to argue that the steel did not disintegrate. And you are talking about disintegration, not dustification. I refuse to use a made-up term just because it makes your story more believable without evidence.
Originally posted by hdutton
reply to post by GenRadek
Sheetrock, gypsum, dust is white and very light in weight.
The dust which I saw, and the article speaks of, is the heavy dark gray cloud which falls and grows as the towers come down.
I hate to keep saying the same things over and over, but reading the article will answer many more questions about what we should be discussing.
Originally posted by hdutton
reply to post by Soylent Green Is People
As noted in the article; the speed of the pressure, shock, wave passing through a solid material must reach a certain velocity in order to break it apart. After this is accomplished the material will become as a podwer because the physical bonds are weakened to this point.
This pressure wave velocity is different for various materials but this shows the best senarios for what happened to the towers on 9/11.
There are very few ways such pressure wave velocitie can be produced, and thermite is not active enough to do so.
Originally posted by hdutton
I have finally found some information which helps to explain why the two large towers of the World trade center turned to dust in mid-air, forming the mushroomed shaped clouds, rather than breaking up when if hit the ground.
Originally posted by Consequence
Originally posted by hdutton
reply to post by Consequence
Again, what I wanted to say is that when concrete cracks, it crumbles, and things get quite dusty. It is a clever way of spreading "truth" with "how fast does a slab of concrete need to fly to get dustified by air resistance". But that question is the wrong question to ask.
The best way to answer this question may be to imagine concrete as a man made rock, which it is.
How far would a rock fall through the air before it is "dustfied by air resistance"?
Well, the answer to this is ... some where close to forever.
I have never seen it happen and I don't think anyone else has.
Er.. yes, that is correct?
I believe you did not understand what I said.