Abstract The aim of this study was to find suitable fire retardants to increase the fire resistance of Scots pine, poplar, and date palm trees. The fire retardants used in this study were disodium-tetra borate (Na2B4O7) (Borax), disodium-hydrogen phosphate (Na2HPO4) (DSHP), diammonium-hydrogen phosphate ((NH2)4HPO4) (DAHP), and polyethylene glycol 400 (PEG 400). The fire retardants were prepared in different concentrations, and the selected wood species were tested in particle form and as solid wood, both with three different surface roughness: sawn, sanded, and planed. Fire tests were completed with a single flame source test, Lindner test, and calorimeter test. Since the fire retardants may affect cement curing, a cement hydration test was conducted by measuring the temperature of the hydration process. Fire retardant concentrations affected the performance of fire retardancy, while surface preparations proved effective only for Scots pine. Nevertheless, much depended on the type of fire retardants used and the wood species upon which they were applied. For the hydration tests, all samples treated with fire retardants were cured normally with the exception of PEG 400, DAHP and DSHP with high concentration. DAHP with 300 g/l and DSHP with 77 g/l concentrations were found to be suitable fire retardants for CBPB production since they increased fire resistance and had small effect on cement curing.

中文翻译：

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用 PEG 400、磷和硼化合物处理的用于水泥粘合木基产品的各种木材的阻燃性比较研究

摘要 本研究的目的是寻找合适的阻燃剂来提高苏格兰松树、杨树和枣椰树的耐火性。本研究中使用的阻燃剂是四硼酸二钠 (Na2B4O7) (Borax)、磷酸氢二钠 (Na2HPO4) (DSHP)、磷酸氢二铵 ((NH2)4HPO4) (DAHP) 和聚乙二醇 400 (PEG) 400）。阻燃剂以不同的浓度制备，并以颗粒形式和实木形式对选定的木材种类进行了测试，两者都具有三种不同的表面粗糙度：锯切、砂光和刨光。火灾测试通过单火焰源测试、Lindner 测试和热量计测试完成。由于阻燃剂可能会影响水泥固化，因此通过测量水化过程的温度来进行水泥水化试验。阻燃剂浓度影响阻燃性能，而表面处理证明仅对苏格兰松有效。然而，很大程度上取决于使用的阻燃剂的类型和它们所应用的木材种类。对于水化试验，除高浓度的PEG 400、DAHP和DSHP外，所有经阻燃剂处理的样品均正常固化。发现浓度为 300 g/l 的 DAHP 和浓度为 77 g/l 的 DSHP 是适合 CBPB 生产的阻燃剂，因为它们提高了耐火性并且对水泥固化的影响很小。除高浓度的PEG 400、DAHP和DSHP外，经阻燃剂处理的所有样品均正常固化。发现浓度为 300 g/l 的 DAHP 和浓度为 77 g/l 的 DSHP 是适合 CBPB 生产的阻燃剂，因为它们提高了耐火性并且对水泥固化的影响很小。除高浓度的PEG 400、DAHP和DSHP外，经阻燃剂处理的所有样品均正常固化。发现浓度为 300 g/l 的 DAHP 和浓度为 77 g/l 的 DSHP 是适合 CBPB 生产的阻燃剂，因为它们提高了耐火性并且对水泥固化的影响很小。