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Reply #48: I don't think so... [View All]

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hack89 Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Jun-28-06 08:11 PM
Response to Reply #5
48. I don't think so...
1. We are talking about a linear charge - not a jet that burns a round hole. Much more difficult - it will take more than vague generality to convince me. Can't find a link?

2. Check your definition of thermate - can you document it ever being used for commercial demolition?.

Thermate-TH3 is a mixture of thermite and pyrotechnic additives which have been found to be superior to standard thermite for incendiary purposes. Its composition by weight is generally thermite 68.7%, barium nitrate 29.0%, sulphur 2.0% and binder 0.3%. Addition of barium nitrate to thermite increases its thermal effect, creates flame in burning and significantly reduces the ignition temperature. Although the primary purpose of Thermate-TH3 is as an incendiary, it will also weld metal surfaces together.


3. Thermite is very hard to ignite. And again, you have not proven that thermite is commonly used for demolition.

Challenges of igniting thermite

Conventional thermite reactions require very high temperatures for initiation. These cannot be reached with conventional black-powder fuses, nitrocellulose rods, detonators, or other common igniting substances. Even when the thermite is hot enough to glow bright red, it will not ignite as it must be at or near white-hot to initiate the reaction. It is possible to start the reaction using a propane torch if done right, but this should never be attempted for safety reasons.

Often, strips of magnesium metal are used as fuses. Magnesium burns at approximately the temperature at which thermite reacts, around 2500 Kelvin (4000 °F). This method is notoriously unreliable: magnesium itself is hard to ignite, and in windy or wet conditions the strip may be extinguished.
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