Durability Evaluation of Intumescent Coating for Steel Frames
Publication: Journal of Materials in Civil Engineering
Volume 13, Issue 4
Abstract
This paper reports on the results of experimental studies on the durability of intumescent coating for steel frames. Intumescent coatings are fireproof materials that provide the thermal insulation of steel structures. They start to foam when the surface temperature reaches about 300°C by heating and form a layer of carbonaceous char 25 to 50 times thicker than at room temperature. However, their durability or long-term fireproofing is not clear. Preliminary accelerated tests and small-scale heat tests were conducted, and it was found that water is the principal environmental factor that affects the durability of intumescent coatings. Another series of accelerated tests and exposure tests was then performed mainly for water resistance. The fire resistance of specimens after degradation was verified in full-scale heat tests. As a result of these tests, a new testing method was proposed for evaluating the durability of intumescent coatings by considering the high-temperature and high-humidity weather conditions of Japan.
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References
1.
British Standards Institution (BSI). ( 1992). “Code of practice for the assessment and use of intumescent coating system for providing fire resistance, part 2.” BS 8202, London.
2.
Institut fur Bautechnik ( 1977). Procedures for testing and approval of intumescent coatings on steel members to comply with F30 fire resistance category of DIN 4102, Berlin.
3.
International Standards Organization (ISO). ( 1975). “Fire-resistance tests—Elements of building construction.” ISO 834-(E), Geneva.
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International Standards Organization (ISO). ( 1988). “Preparation of steel substrates before application of paints and related products.” ISO 8501-1(E), Geneva.
5.
Japanese Society of Steel Construction (JSSC). ( 1998). Survey and study on practical application of intumescent coatings, Tokyo.
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Japanese Standards Association (JSA). ( 1979). “Testing methods for organic coatings.” JIS K 5400, Tokyo.
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Wakamatsu, T. ( 1988). “Development of design system for building fire safety.” Proc., 2nd Int. Symp. Int. Assoc. for Fire Safety, 881–895.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 13 • Issue 4 • August 2001
Pages: 274 - 281
History
Received: May 27, 1999
Published online: Aug 1, 2001
Published in print: Aug 2001
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