Thermal behaviour of reaction intumescent paint used for passive protection of steel structures
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abstract
Steel structures often need some passive protection measures for the validation of national and
international regulations. These regulations present standard and simplified methods for the design of
steel structures when exposed to fire conditions. One of this formulae presented in Eurocode 3 has
been determined based on simplified hypothesis for material protection behaviour, considering
uniform temperature distribution across steel section, constant thermal conductivity and constant
thickness for material insulation. This work presents preliminary experimental tests for determining the
thermal insulation behaviour (thermal conductivity) as function of the mean insulation temperature
evolution [1]. Specimens have been coated and heated with slow heating rate, 800 [ºC/h], and
temperatures have been recorded on steelwork IPE100 profiles. Results are in good agreement with
other numerical simulations proposed by Tan et al for other intumescent protection system [2].
