木材耐久性数据的统计分析及其对标准化分类方案的影响

Standards Pub Date : 2023-06-16 DOI:10.3390/standards3020017
C. Brischke, Felix Haase, Lea Bächle, S. Bollmus
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摘要

木材的生物耐久性是木制品户外应用的一项重要性能。在温带气候地区,最关键的生物危害是破坏木材的真菌,欧洲标准EN 350与EN 113-2结合提供了针对棕色和白腐真菌的木材耐久性取样、测试和分类的指导。然而,在其最新修订版本中,两个标准都建议使用概率密度函数来拟合质量损失数据(ML)。随后,木材的耐久性及其可变性应进一步表征。本研究的目的是统计分析实验室琼脂板测试不同欧洲生长木材的ML数据,并检验不同统计处理对木材耐久性标准化分类方案的影响。结论是,取样程序需要更精确的指导,因为在杆区之间存在显著的耐久性差异。分散指标的分配需要修订,以确保木材的清晰、准确和可重复的耐久性分类。这两项标准在描述所建议的统计处理方面的缺陷变得明显起来。应用概率密度函数是否提供了关于木材耐久性变异性的额外信息,这一点值得怀疑。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Statistical Analysis of Wood Durability Data and Its Effect on a Standardised Classification Scheme
The biological durability of wood is an important property for outdoor applications of wood-based products. In temperate climate zones, the most critical biological hazard is wood-destroying fungi, and the European standard EN 350 in combination with EN 113-2 provide guidance on sampling, testing, and classifying wood durability against brown and white rot fungi. However, in their latest revised versions, both standards recommend the use of probability density functions for fitting mass loss data (ML). Subsequently, the durability of wood and its variability should be further characterised. The aim of this study was to statistically analyse the ML data from laboratory agar plate tests with different European-grown wood species and to examine the effect of different statistical treatments on the standardised classification scheme of wood durability. It was concluded that more precise guidance is needed on the sampling procedure since significant differences in durability exist between stem zones. The assignment of dispersion indicators requires a revision to ensure clear, unmistakable, and reproducible durability classification of wood. Deficits in the description of the proposed statistical treatments in both standards became evident. It can be questioned whether the application of probability density functions provides additional information about the variability of wood durability.
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