Global modelling of fire protection performance of an intumescent coating under different furnace fire conditions
Global modelling of fire protection performance of an intumescent coating under different furnace fire conditions
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DOI：
10.1177/0734904112453566
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发表时间：
2013-01
影响因子：
1.9
通讯作者：
Yong Zhang;Yong C. Wang;C. Bailey;A. Taylor
中科院分区：
文献类型：
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作者：
Yong Zhang;Yong C. Wang;C. Bailey;A. Taylor
本文提出了一种模拟膨胀涂层在不同闪络炉后火灾条件下整体防火性能的方法。膨胀涂料是反应性防火材料，其防火性能取决于加热条件，其中最大膨胀比是关键指标。本研究的目的是找到一组共同的特性，使膨胀涂层的防火性能能够在不同的加热条件下预测膨胀涂层。在不同炉温-时间曲线下，将得到的性能应用于膨胀涂层整体膨胀过程和保护钢基体温度的预测模型中。该模型在不同辐射热通量水平（50和65 kW m - 2）下以及钢板厚度（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，已被作者证明可为锥形量热计测试提供准确的结果。本文将介绍在锥形量热计试验中使用的相同钢板厚度和干膜厚度组合下，在不同的火灾温度-时间关系（慢、快、标准）下的闪络炉后火灾试验的实验结果。预测结果与试验结果的比较表明，钢板温度结果与最终膨胀厚度的误差一般在10%以内，最终膨胀厚度的误差一般在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.