Relationship between Chemical Retention and Velocity of Air-Coupled Ultrasonic Waves in Fire-Retardant-Treated Wood
| Autor: | Junji Matsumura, Hiroyuki Okamura, Masumi Hasegawa, Kazutoshi Takeuchi, Takeshi Kumamoto, Asakura Ryohei |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
040101 forestry
0106 biological sciences Chemical concentration Environmental Engineering Materials science business.industry Wave velocity Bioengineering 04 agricultural and veterinary sciences 01 natural sciences Radial direction 010608 biotechnology Nondestructive testing 0401 agriculture forestry and fisheries Ultrasonic sensor Composite material Air coupled business Waste Management and Disposal Fire retardant |
| Zdroj: | BioResources. 12 |
| ISSN: | 1930-2126 |
| DOI: | 10.15376/biores.12.2.3387-3395 |
| Popis: | The ultrasonic wave velocities in wood impregnated with a fire-retardant chemical were measured via a non-contact method. An air-coupled ultrasonic wave was made to propagate along the radial direction of the wood. The wave velocities in the wood samples after chemical impregnation were larger than those before impregnation. With increased chemical concentration, the relative changes in the velocities increased to a maximum of 16.3%, and these velocity changes exhibited a strong correlation with the chemical retention. These findings suggest that it is possible to evaluate the uniformity distributions of chemicals in fire-retardant-treated wood via a non-contact and nondestructive method based on air-coupled ultrasonics. |
| Databáze: | OpenAIRE |
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