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Examination of the effect of fire retardant materials on timber

机译：检查阻燃材料对木材的影响

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Purpose - The fire safety of structures is an existing and important design aspect, which is assured by strict regulations. As a means to adhere to the strict requirements, fire protection has become a core problem. It is particularly difficult to comply with these regulations in the case of timber, which is a combustible material. These problems could be solved by enveloping the wood in fire retardant materials. MSZ EN 1995-1-2 currently does not take into consideration the fire-retardant materials charring rate under fire exposure. Design/methodology/approach - However, currently these fire retardants are proving to be reliable and depending on their application can achieve better reaction-to-fire classifications. During the research, the authors used five different fire-retardant materials on three different types of wood and tested their behaviours in a laboratory. When selecting them, it was important to choose the species that are most commonly used in the building industry but which have significantly different densities. Our choice fell upon spruce (360 kg/m3), Scots pine (540 kg/m3) and oak (650 kg/m3). During the tests, we examined the weight reduction and the process of burning on the specimens treated with the fire retardant material. In addition, the authors also performed tests by derivatography on both untreated and treated specimen. Findings - The question is whether the effects of the fire retardants should be taken into consideration when calculating the extent of the burn. The Eurocode (MSZ EN 1995-1-2) does not provide any opinions. On the market, there are manufacturers who are already discussing the possibilities of reducing the burn rate during the qualification of paints. In this paper, based on the results we received, we discuss the beneficial effects of the fire retardants which can be taken into account while measuring cross-sections. Originality/value - By using fire retardants, a high proportion of cross-sectional area gain is only possible in case of small cross-sections; therefore, it is advisable to use them here as well. This can be effective for example in many smaller cross-sections, when there is a little space and therefore requires a small cross-section. Thus, if a larger cross-section without protection is not possible, it can be replaced by a smaller cross section, treated with a fire retardant.
机译：目的 - 结构的消防安全是现有和重要的设计方面，由严格的法规确保。作为坚持严格要求的手段，消防保护已成为核心问题。在木材的情况下，特别难以遵守这些规定，这是一种可燃材料。这些问题可以通过在阻燃材料中包裹木材来解决。 MSZ EN 1995-1-2目前尚未考虑火灾曝光率的阻燃材料的搅拌率。设计/方法/方法 - 然而，目前这些阻燃剂证明是可靠的，具体取决于他们的应用，可以实现更好的反应到火灾分类。在研究期间，作者在三种不同类型的木材上使用了五种不同的阻燃材料，并在实验室中测试了他们的行为。选择它们时，重要的是选择建筑业最常用的物种，但具有显着不同的密度。我们的选择落后于云杉（360 kg / m3），苏格兰松树（540 kg / m3）和橡木（650 kg / m3）。在测试期间，我们检查了用阻燃材料处理的试样燃烧的重量和燃烧过程。此外，作者还通过在未处理和治疗的标本上通过衍生物进行测试。结果 - 问题是在计算烧伤程度时应考虑阻燃剂的效果。欧洲码（MSZ EN 1995-1-2）没有提供任何意见。在市场上，有些制造商已经讨论了在涂料资格期间降低烧伤率的可能性。在本文中，根据我们收到的结果，我们讨论了阻燃剂的有益效果，在测量横截面时可以考虑的阻燃剂。原创性/值 - 通过使用阻燃剂，在小横截面的情况下，才能实现高比例的横截面积增益;因此，建议在这里使用它们。当存在小空间时，这可以在许多较小的横截面中有效，因此需要一个小横截面。因此，如果不可能有没有保护的较大横截面，则它可以由用阻燃剂处理的较小横截面代替。

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