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Wood Density Determination by Drilling Chips Extraction in Ten Softwood and Hardwood Species
Forests ( IF 2.9 ) Pub Date : 2020-03-27 , DOI: 10.3390/f11040383
Roberto D. Martínez , José-Antonio Balmori , Daniel F. Llana , Ignacio Bobadilla

Research Highlights: The novelty of this study is the development of an accurate wood density estimation method based on a relatively brand new semi-destructive testing technique (drilling chips extraction). This method is especially crucial in the assessment of existing timber structures. Background and Objectives: Probing, drilling, and coring are non-destructive and semi-destructive techniques commonly used for timber density estimation in existing timber structures. Most of these techniques show poor or medium accuracy or are so expensive or destructive. This paper aims to obtain accurate estimation models for wood density in existing structures using the easy to use drilling chips extraction technique. Materials and Methods: 300 specimens (95 × 65 × 200 mm3) from ten softwood and hardwood species covering a wide range of density (from 350 to 980 kg·m−3) were tested after conditioning. The Wood Extractor device based on the drilling chips extraction technique was used in the radial and the tangential direction. Mass of the chips collected (drilling residue) from each drill was recorded. Results: Density obtained from drilling residue was not statistically significantly different between radial and tangential directions avoiding take into account direction when measuring. The density obtained in the whole specimens is slightly higher than the density obtained by drilling residue being this difference uniformly through the range of densities studied. Two different estimation models were presented with high determination coefficients (96% and 97%) and low standard errors. These results were similar to those obtained by other authors using core drilling but causing less damage. Conclusions: Drilling chips extractor is a simple, reliable and inexpensive method to estimate density in existing structures with accuracy.

中文翻译:

用钻屑萃取法测定10种软木和硬木树种的木材密度

研究重点:这项研究的新颖性是基于相对较新的半破坏性测试技术(钻屑提取)开发的一种精确的木材密度估算方法。该方法在评估现有木材结构时尤其重要。背景与目的:探测,钻孔和取芯是用于现有木材结构中木材密度估算的非破坏性和半破坏性技术。这些技术大多数显示出较差的或中等的精度,或者非常昂贵或具有破坏​​性。本文旨在通过使用易于使用的钻屑提取技术来获得现有结构中木材密度的准确估算模型。材料和方法: 300个样本(95×65×200 mm3)在调节后,测试了十种覆盖广泛密度范围(从350到980 kg·m -3)的软木和硬木。在径向和切线方向上使用了基于钻屑提取技术的木材提取器设备。记录从每个钻头收集的切屑的质量(钻屑)。结果:从钻井残渣获得的密度在径向和切向之间在统计上没有显着差异,因此避免在测量时考虑方向。在整个样品中获得的密度略高于通过钻探残渣获得的密度,该密度在研究的密度范围内均匀分布。提出了两种具有较高确定系数(96%和97%)和较低标准误的估计模型。这些结果与其他作者使用岩心钻探获得的结果相似,但造成的损害较小。结论:钻屑提取器是一种简单,可靠且廉价的方法,可以准确估算现有结构中的密度。
更新日期:2020-03-27
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