Nondestructive prediction of fire performance in fire retardant-treated wood using x-ray computed tomography
Nondestructive prediction of fire performance in fire retardant-treated wood using x-ray computed tomography
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DOI：
10.15376/biores.17.4.6900-6909
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发表时间：
2022-10
期刊：
影响因子：
1.5
通讯作者：
Masumi Hasegawa;Hiroyuki Okamura;Yasushi Hano
中科院分区：
文献类型：
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作者：
Masumi Hasegawa;Hiroyuki Okamura;Yasushi Hano
经过阻燃处理的木材的防火性能可以根据化学阻燃剂的用量来评估。因此，需要确定木材中化学成分的方法。使用微焦点 X 射线计算机断层扫描捕获阻燃处理前后木材样品的立体图像。使用从 X 射线图像切片的二值化图像计算表示浓度的图像亮度值。处理前后综合亮度值的变化与化学含量呈强正相关，显着性水平为1%。根据两者之间的关系预测了经过阻燃处理的木材的化学含量。预测值与浸出法测量值一致。使用锥形量热仪对经过阻燃处理的木材进行防火性能测试。经过处理的木材被分为阻燃木材和不燃木材。此外，通过综合亮度值变化与化学含量之间的关系预测的防火性能与防火性能测试的分级一致。这些发现表明，X 射线计算机断层扫描可潜在用于预测经过阻燃剂处理的木材的化学含量。
The fire performance of fire retardant-treated wood can be evaluated based on how much of the chemical retardant is used. Therefore, methods for identifying chemical content in wood are needed. Stereo images of wood samples before and after the fire retardant treatment were captured using micro-focus X-ray computed tomography. Image brightness values, indicating concentration, were calculated using binarized images sliced from the X-ray images. Changes in integrated brightness values before and after treatment showed a strong positive correlation with chemical content at a 1% significance level. The chemical content of the retardant-treated wood was predicted based on the relationship between the two. The predicted values were in agreement with the values measured using the leaching method. Fire performance tests of the fire retardant-treated wood were conducted using a cone calorimeter. The treated wood was classified as fire-retardant and non-combustible wood. In addition, the fire performance predicted by the relationship between changes in integrated brightness values and chemical content agreed with the classification by the fire performance test. These findings suggest that X-ray computed tomography can be potentially used to predict the chemical content of fire retardant-treated wood.