intumescence

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intumescence

[‚in·tü′mes·əns]
(materials)
The property of a material to swell when heated; intumescent materials in bulk and sheet form are used as fireproofing agents.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

intumescence

The process of swelling up, as with the application of heat, such as vermiculite that is heat-treated for use in thermal insulation.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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This technology uses organic components that intumesce snd form a non-flammable char in a fire to prevent flaking off and provides thermal protection.
These react to the heat generated during a fire and intumesce, or swell up, to provide a tough and stable insulating layer of the steel which can prevent it from buckling for at least one hour.
Some paints that were tested had a tendency to he hampered by time and would no longer intumesce," said Dr.