Global modelling of fire protection performance of intumescent coating under different cone calorimeter heating conditions
Global modelling of fire protection performance of intumescent coating under different cone calorimeter heating conditions
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DOI：
10.1016/j.firesaf.2012.02.004
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发表时间：
2012-05
影响因子：
3.1
通讯作者：
Y. Zhang;Yong C. Wang;C. Bailey;A. P. Taylor
中科院分区：
文献类型：
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作者：
Y. Zhang;Yong C. Wang;C. Bailey;A. P. Taylor
本文提出了一种对膨胀型涂料在不同闪络后炉火条件下的整体防火性能进行建模的方法。膨胀型涂料是一种反应性防火材料，其防火性能取决于加热条件，其中最大膨胀率是关键指标。本研究的目的是找到一组共同的性质，使膨胀涂料的防火性能能够在不同的加热条件下预测膨胀涂料的防火性能。将所获得的性能用于预测膨胀涂层的整体膨胀过程和不同炉温-时间曲线下的保护钢基材温度。该模型在不同水平的辐射热流(50和65kW m−2)、钢板厚度(5、10和20 mm)和膨胀涂层干膜厚度(0.4、0.8和1.2 mm)的不同组合下，为锥形量热计试验提供了准确的结果。本文将给出与锥形量热计试验相同的钢板厚度和干膜厚度组合在不同火灾温度-时间关系(慢、快和标准)下闪络后炉火试验的实验结果。预测结果与实验结果的对比表明，钢板温度结果一般在10%以内，最终展开厚度的误差在20%以内。
This article presents a method to model the overall fire protection performance of an intumescent coating under different post-flashover furnace fire conditions. Intumescent coatings are reactive fire protection materials, and their fire protection performance, among which the maximum expansion ratio is the key indicator, depends on the heating condition. The aim of this research is to find one common set of properties to enable the intumescent coating fire protection performance to be predicted across different heating conditions on the intumescent coating. The obtained properties are implemented in a model to predict the global expansion process of intumescent coating and the protected steel substrate temperature under various furnace temperature–time curves. This model has previously been demonstrated by the authors to provide accurate results for cone calorimeter tests under different levels of radiant heat flux (50 and 65 kW m−2) and with different combinations of steel plate thickness (5, 10 and 20 mm) and intumescent coating dry film thickness (0.4, 0.8 and 1.2 mm). This article will present the experimental results of post-flashover furnace fire tests under different fire temperature–time relationships (slow, fast and standard) for the same combinations of steel plate thickness and dry film thickness as used in the cone calorimeter tests. A comparison between the prediction and experimental results indicates that the steel plate temperature results are typically within 10% and the final expanded thickness within 20% of each other.