2024-03-28T22:37:08Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/523292022-03-09T21:48:49Zcom_10324_1167com_10324_931com_10324_894col_10324_1238
Wood Density and Moisture Content Estimation by Drilling Chips Extraction Technique
Martínez López, Roberto Diego
Balmori Roiz, José Antonio
Llana, Daniel
Bobadilla Maldonado, Ignacio
Density - Estimation
Densidad - Estimación
Timber - Structures
Madera - Estructuras
Producción Científica
The novelty of this study is the development of an accurate wood moisture content (MC) estimation method based on a relatively brand-new, non-destructive testing technique (drilling chips extraction). The method is especially important in the assessment of existing timber structures, where non-destructive testing (NDT) results are affected by wood MC and should be adjusted to a reference MC, usually 12%. In the assessment of timber structures, it is not possible to determine MC by oven drying method and this should be estimated. Electrical resistance and capacitance are the conventional methods used for MC estimation. This research work aims to present an accurate MC estimation method based on the drilling chips extraction technique. For that, 99 specimens (90 × 65 × 38 mm3) from three softwood and hardwood species covering a wide range of densities (from 355 to 978 kg m−3) were tested after conditioning at five different MCs (5%, 10%, 15%, 20%, 25%). The Wood Extractor device based on the drilling chips extraction technique was used. The mass of the chips collected (drilling residue) from each drill was recorded. The results show that the MC of the chips extracted was statistically significantly different than the MC of the specimen and cannot be directly used as MC determination. However, the chips MC can be used as an estimator of specimen MC with high determination coefficients (R2 from 71% to 86%). As the main result, models to estimate density directly adjusted to a reference 12% MC from the wet and dry mass of chips extracted were developed with an R2 of 98%. In sum, the drilling chips extractor is a dependable and straightforward method to estimate MC and density from only one measurement. Density adjusted to a reference 12% MC can be directly estimated from a single model.
Ministerio de Economía, Industria y Competitividad (project BIA2014-55089-P)
Asociación de Investigación Técnica de la Madera (projects AITIM-Fucovasa 2012–2013 and AITIMFucovasa 2014–2015)
2022-03-09T12:49:43Z
2022-03-09T12:49:43Z
2020
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Materials, 2020, vol. 13, n. 7, 1699
1996-1944
https://uvadoc.uva.es/handle/10324/52329
10.3390/ma13071699
eng
https://www.mdpi.com/1996-1944/13/7/1699/htm
Atribución 4.0 Internacional
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
© 2020 The Authors
application/pdf
MDPI
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Hispana
TEXT
http://creativecommons.org/licenses/by/4.0/
UVaDOC. Repositorio Documental de la Universidad de Valladolid
https://uvadoc.uva.es/handle/10324/52329