[Measuring the density of wood and bamboo using computed tomography]

Area of Science:

• Wood Science
• Materials Science
• Non-destructive Testing

Background:

• Computed tomography (CT) is a widely used non-destructive technique for wood material analysis.
• Density measurement is a critical parameter in the application of CT for wood materials.

Purpose of the Study:

• To evaluate the efficacy of CT for measuring the air-dry density of wood and bamboo.
• To establish the correlation between CT values and the actual density of various wood and bamboo species.

Main Methods:

• Utilized CT scanning to assess 24 species of wood and 1 species of bamboo.
• Measured the air-dry density of the selected wood and bamboo samples.
• Analyzed the linear correlation between CT values and the measured air-dry densities.

Main Results:

• A strong linear correlation (correlation coefficient of 0.99) was observed between CT values and air-dry density for 24 kinds of woods.
• An equally strong linear correlation (correlation coefficient of 0.99) was found for 25 kinds of lignin materials, including 24 woods and 1 bamboo.
• Density measurements ranged from 0.303 to 1.061 g x cm(-3).

Conclusions:

• CT is an appropriate and effective method for measuring the density of wood and bamboo.
• These findings represent a technological breakthrough for quantitative CT detection in wood.
• The study provides technical support for the application of CT in wood science research and wood processing.