RT info:eu-repo/semantics/article
T1 Wood Density and Moisture Content Estimation by Drilling Chips Extraction Technique
A1 Martínez López, Roberto Diego
A1 Balmori Roiz, José Antonio
A1 Llana, Daniel
A1 Bobadilla Maldonado, Ignacio
K1 Density - Estimation
K1 Densidad - Estimación
K1 Timber - Structures
K1 Madera - Estructuras
AB 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.
PB MDPI
SN 1996-1944
YR 2020
FD 2020
LK https://uvadoc.uva.es/handle/10324/52329
UL https://uvadoc.uva.es/handle/10324/52329
LA eng
NO Materials, 2020, vol. 13, n. 7, 1699
NO Producción Científica
DS UVaDOC
RD 23-nov-2024