9/11 Conspiracy Nuts Check out what gasoline fire can do to concrete & steel

topic posted Sun, April 29, 2007 - 6:29 PM by  Tony
Share/Save/Bookmark
Advertisement
So you people who say that jet fuel can't melt steel and that the twin towers came down because of explosives? Uh huh. Come over to the Bay Area and see what a fuel truck can do to a freeway. That's burn it until the steel melts and the overpass falls down. THROUGH concrete.

So much for the rumors that jet fuel (which burns hotter than regular gas) can't melt steel I beams.

Oh but wait. This is probably part of hte cover up isn't it? Yeah right.

Sheesh.

www.sfgate.com/cgi-bin/bl...chik/detail
posted by:
Tony
Sacramento
Advertisement
Advertisement
  • What then do you think they put in the planes to melt the steel? Acid of some sort? It would have to be a lot.
    • Regular low octane gasoline, as any plumber who has used a gasoline blow torch can tell you will get plenty hot enough to melt steel. Aviation gasoline, being higher octane, burns at an even hotter temperature. And anyone who has tried to braze or even solder with a gasoline blow torch with the workpiece laying directly on the concrete, can tell you all about how it spalls off in big chunks from the differential heating. I have the scars on my arm to prove it, from the time I tried to solder a radiator when I was a teenager. People who think there were other forces at work are either ignorant of the facts and how those materials react to heat, or just plain nuts, or both.
  • Do any of you understand the physics of combustion? Setting aside the Conspiracy theories for a moment, kerosene is jet fuel, with the molecular formula C12H26. The open air burning temperature of kerosene is approx. 575 degrees F. Combustion (combustion reaction) is defined as the burning of a fuel and oxidant to produce heat and/or work. Simply stated it’s a Redox (reduction-oxidation) reaction. The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. You can not put gasoline into a diesel engine; it will combust prematurely unlike kerosene which will run in a high compression engine like a diesel.

    When wood combusts in open air it is far from a complete reaction so it leaves soot behind. The soot is unburned carbon as well as various carbon compounds indicating incomplete combustion. Fuel-oxygen pre-mixing determines the rate of combustion and thus the temperature and reaction paths. A “blowtorch” burns at a more complete combustion rate at approx. 1000 degrees C. Steel melts at approx. 1370 degrees C.

    I saw a lot of soot coming from the twin towers thus I must conclude the combustion reaction was incomplete. Even if a complete combustion reaction was achieved it could not melt steel! You might want to open a book and read it before stating an “opinion” contrary to fact.
    • The steel in the twin towers was not melted. Concrete contains a certain amount of moisture, even fully cured, in air bubbles inside the mix (That is why it is called "air entrained"). When exposd to heat, the water in the air bubbles becomes vaporized and eventualy builds up anough pressure to crack the concrete. Neither concrete alone, nor steel alone could support the weight of the floors above. When they collapsed, the force (weight X the accceleration of gravity @32ft/sec^2) combined to apply an excessive load to the floors below, each successive collapse, lending that much force to the next floor down. Needless to say, eventually, there came a point where the combined weights of the upper stories, and acceleration exceeded the tensile strength of steel, and beams were bent, and twisted, the bolts holding them sheared, and eventually, at successively lower floors, the beams themselves sheared. .

Recent topics in """Conspiracy theories""