A Review of the Applicability of Non-destructive Testing for the Determination of the Fire Performance of Reused Structural Timber
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Abstract
Abstract This paper presents a review of the possible methods for testing the fire performance properties of reused timber through non-destructive techniques, focusing on structural elements. Evaluating the fire performance of old wooden specimen is necessary to facilitate reuse, in the support of the transition to a circular economy. The use of non-destructive methods minimizes damages to the pieces during the evaluation process. Three angles are reviewed: (1) The properties of wood influencing fire performance, (2) the change of wood properties over time, and (3) the known non-destructive tests. Some properties of wood are known to influence the fire performance, e.g., the density. Of these, there is no evidence of irreversible changes due to the passage of time only. The many different non- and semi- destructive techniques that can be applied to wood seldom relate to these properties, but rather to mechanical properties or geometry. Additionally, accurate measurements are often difficult, while some are only done in laboratories. This review concludes that currently there is no known non-destructive method that permits to estimate the fire performance of a reused timber element compared to a new one. There is a gap of knowledge on the evolution of the fire properties of timber during the use phase of the building, and there are no established methods to test for these properties without destroying a significant portion of the element. Development of non-destructive test methodologies to assess fire properties of timber will expand the market for reused timber to include load carrying timber.
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OpenAlex topics: Wood Treatment and Properties · Fire effects on concrete materials · Fire dynamics and safety research
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References (100+)
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1. Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions—A new Circular Economy Action Plan—For a cleaner and more competitive Europe. (2020)
2. Delivering the European Green Deal. https://commission.europa.eu/strategy-and-policy/priorities-2019-2024/european-green-deal/delivering-european-green-deal_en
3. Risse, M., Weber-Blaschke, G., Richter, K.: Resource efficiency of multifunctional wood cascade chains using LCA and exergy analysis, exemplified by a case study for Germany. Resour. Conserv. Recycl. 126, 141–152 (2017). https://doi.org/10.1016/j.resconrec.2017.07.04510.1016/j.resconrec.2017.07.045 ↗
4. Niu, Y., Rasi, K., Hughes, M., Halme, M., Fink, G.: Prolonging life cycles of construction materials and combating climate change by cascading: the case of reusing timber in Finland. Resour. Conserv. Recycl. 170, 105555 (2021). https://doi.org/10.1016/j.resconrec.2021.10555510.1016/j.resconrec.2021.105555 ↗
5. Waste prevention and management—Environment—European Commission. https://ec.europa.eu/environment/green-growth/waste-prevention-and-management/index_en.htm
6. Benachio, G.L.F., Freitas, M.C.D., Tavares, S.F.: Circular economy in the construction industry: a systematic literature review. J. Clean. Prod. 260, 121046 (2020). https://doi.org/10.1016/j.jclepro.2020.12104610.1016/j.jclepro.2020.121046 ↗
7. Knoth, K., Fufa, S.M., Seilskjær, E.: Barriers, success factors, and perspectives for the reuse of construction products in Norway. J. Clean. Prod. 337, 130494 (2022). https://doi.org/10.1016/j.jclepro.2022.13049410.1016/j.jclepro.2022.130494 ↗
8. Bertelsen, S.E., Fogh Gustafsson, K., Hill-Hansen, D., Shoonhoven, J., Lysgaard Vind, D.: Drivers and demands for circular building materials. Lendager TCW (2020)
9. Mikkola, E.: Charring of wood based materials. Fire Saf. Sci. 3, 547–556 (1991). https://doi.org/10.3801/IAFSS.FSS.3-54710.3801/IAFSS.FSS.3-547 ↗
10. European Committee for Standardization: EN 1995 (2004) Eurocode 5: Design of timber structures
11. Standards Australia: AS/NZS 1720.4 Timber structures Fire resistance of timber elements (2019)
12. ANSI: National Design Specification for Wood Construction (2024)
13. Bartlett, A.I., Hadden, R.M., Bisby, L.A.: A review of factors affecting the burning behaviour of wood for application to tall timber construction. Fire Technol. 55, 1–49 (2019). https://doi.org/10.1007/s10694-018-0787-y10.1007/s10694-018-0787-y ↗
14. Gilka-Bötzow, A., Heiduschke, A., Haller, P.: Zur Abbrandrate von Holz in Abhängigkeit der Rohdichte. Eur. J. Wood Wood Prod. 69, 159–162 (2011). https://doi.org/10.1007/s00107-010-0430-110.1007/s00107-010-0430-1 ↗
15. Pánek, M., Kubovský, I., Oberhofnerová, E., Štěrbová, I., Niemz, P., Osvald, A., Kačík, F.: Influence of natural weathering on the ignition and relative burning rate of selected softwoods. Constr. Build. Mater. 304, 124615 (2021). https://doi.org/10.1016/j.conbuildmat.2021.12461510.1016/j.conbuildmat.2021.124615 ↗
16. Harada, T.: Charring of wood with thermal radiation, 2: charring rate calculated from mass loss rate. Mokuzai Gakkai-Shi. 42, 194–201 (1996)
17. Adetayo, O., Dahunsi, B.I.O.: Comparisons of predicted and experimental charring rates at various moisture contents of selected Southern Nigerian structural wood species. Eng. Technol. Appl. Sci. Res. 47, 93–102 (2020)
18. Fahrni, R., Klippel, M., Just, A., Ollino, A., Frangi, A.: Fire tests on glued-laminated timber beams with specific local material properties. Fire Saf. J. 107, 161–169 (2019). https://doi.org/10.1016/j.firesaf.2017.11.00310.1016/j.firesaf.2017.11.003 ↗
19. Haurie, L., Giraldo, M.P., Lacasta, A.M., Montón, J., Sonnier, R.: Influence of different parameters in the fire behaviour of seven hardwood species. Fire Saf. J. 107, 193–201 (2019). https://doi.org/10.1016/j.firesaf.2018.08.00210.1016/j.firesaf.2018.08.002 ↗
20. Chorlton, B., Gales, J.: Fire performance of cultural heritage and contemporary timbers. Eng. Struct. 201, 109739 (2019). https://doi.org/10.1016/j.engstruct.2019.10973910.1016/j.engstruct.2019.109739 ↗
21. Friquin, K.L.: Material properties and external factors influencing the charring rate of solid wood and glue-laminated timber. Fire Mater. 35, 303–327 (2011). https://doi.org/10.1002/fam.105510.1002/fam.1055 ↗
22. Aseeva, R., Serkov, B., Sivenkov, A.: Effect of natural aging of timber building structures on fire behavior and fire safety. In: Fire Behavior and Fire Protection in Timber Buildings, pp. 229–258. Springer Netherlands, Dordrecht (2014)10.1007/978-94-007-7460-5_10 ↗
23. Mindykowski, P., Jørgensen, M., Svensson, S., Jomaas, G.: A simple correlation for monitoring the ignition propensity of wet nordic spruce wood. Fire Saf. J. 107, 186–192 (2019). https://doi.org/10.1016/j.firesaf.2018.08.00110.1016/j.firesaf.2018.08.001 ↗
24. Pečenko, R., Svensson, S., Hozjan, T.: Modelling heat and moisture transfer in timber exposed to fire. Int. J. Heat Mass Transf. 87, 598–605 (2015). https://doi.org/10.1016/j.ijheatmasstransfer.2015.04.02410.1016/j.ijheatmasstransfer.2015.04.024 ↗
25. Galgano, A., Di Blasi, C.: Modeling the propagation of drying and decomposition fronts in wood. Combust. Flame 139, 16–27 (2004). https://doi.org/10.1016/j.combustflame.2004.07.00410.1016/j.combustflame.2004.07.004 ↗
26. Spearpoint, M.J., Quintiere, J.G.: Predicting the piloted ignition of wood in the cone calorimeter using an integral model—effect of species, grain orientation and heat flux. Fire Saf. J. 36, 391–415 (2001). https://doi.org/10.1016/S0379-7112(00)00055-210.1016/S0379-7112(00)00055-2 ↗
27. Gerandi, G., Tihay-Felicelli, V., Santoni, P.-A., Leroy-Cancellieri, V., Cancellieri, D.: Multi-scale modeling of the degradation of thermally thin wood plates. Fire Saf. J. 108, 102823 (2019). https://doi.org/10.1016/j.firesaf.2019.10282310.1016/j.firesaf.2019.102823 ↗
28. Dietenberger, M., Hasburgh, L.: Wood products thermal degradation and fire. Ref. Module Mater. Sci. Mater. Eng. (2016). https://doi.org/10.1016/b978-0-12-803581-8.03338-510.1016/b978-0-12-803581-8.03338-5 ↗
29. Tran, H.C., White, R.H.: Burning rate of solid wood measured in a heat release rate calorimeter. Fire Mater. 16, 197–206 (1992). https://doi.org/10.1002/fam.81016040610.1002/fam.810160406 ↗
30. Richter, F., Atreya, A., Kotsovinos, P., Rein, G.: The effect of chemical composition on the charring of wood across scales. Proc. Combust. Inst. 37, 4053–4061 (2019). https://doi.org/10.1016/j.proci.2018.06.08010.1016/j.proci.2018.06.080 ↗
31. Cimer, Z., Czoboly, O., Harmann, B., Lublóy, É.: The effect of the wood defects on fire resistance. Period. Polytech. Civ. Eng. 64, 60–64 (2020). https://doi.org/10.3311/PPci.1483810.3311/PPci.14838 ↗
32. Sandanus, J., Kamenická, Z., Rantuch, P., Martinka, J., Balog, K.: Charring of timber with fissures in experimental and numerical simulations. In: Makovicka Osvaldova, L., Markert, F., Zelinka, S.L. (eds.) Wood & Fire Safety, pp. 159–165. Springer, Cham (2020)10.1007/978-3-030-41235-7_24 ↗
33. Harun, G., Chorlton, B., Richter, F., Gales, J.: The effects of radial cracks on the fire performance of heritage timber. Fire Mater. 47, 386–399 (2023). https://doi.org/10.1002/fam.310410.1002/fam.3104 ↗
34. Wang, Y., Wang, W., Zhou, H., Qi, F.: Burning characteristics of ancient wood from traditional buildings in Shanxi Province, China. Forests 13, 190 (2022). https://doi.org/10.3390/f1302019010.3390/f13020190 ↗
35. Richter, F., Rein, G.: A multiscale model of wood pyrolysis in fire to study the roles of chemistry and heat transfer at the mesoscale. Combust. Flame 216, 316–325 (2020). https://doi.org/10.1016/j.combustflame.2020.02.02910.1016/j.combustflame.2020.02.029 ↗
36. Collier, PCR: SR42 Charring rates of timber. https://www.branz.co.nz/pubs/research-reports/sr42/ (1992)
37. Njankouo, J., Dotreppe, J.-C., Franssen, J.-M.: Experimental study of the charring rate of tropical hardwoods. Fire Mater. 28, 15–24 (2004). https://doi.org/10.1002/fam.83110.1002/fam.831 ↗
38. Hugi, E., Wuersch, M., Risi, W., Wakili, K.G.: Correlation between charring rate and oxygen permeability for 12 different wood species. J. Wood Sci. 53, 71–75 (2007). https://doi.org/10.1007/s10086-006-0816-110.1007/s10086-006-0816-1 ↗
39. Hugi, E., Weber, R.: Fire behaviour of tropical and European wood and fire resistance of fire doors made of this wood. Fire Technol. 48, 679–698 (2012). https://doi.org/10.1007/s10694-010-0207-410.1007/s10694-010-0207-4 ↗
40. Wiesner, F., McGiveron, B., Liu, T., Hidalgo, J.P., Morrell, J.J.: Bushfire performance of native Australian wood species. Fire Saf. J. 140, 103884 (2023). https://doi.org/10.1016/j.firesaf.2023.10388410.1016/j.firesaf.2023.103884 ↗
41. International Organization for Standardization: ISO 834-1:1999
42. White, R.H., Nordheim, E.V.: Charring rate of wood for ASTM E 119 exposure. Fire Technol. 28, 5–30 (1992). https://doi.org/10.1007/BF0185804910.1007/BF01858049 ↗
43. Di Blasi, C., Branca, C., Santoro, A., Gonzalez Hernandez, E.: Pyrolytic behavior and products of some wood varieties. Combust. Flame 124, 165–177 (2001). https://doi.org/10.1016/S0010-2180(00)00191-710.1016/S0010-2180(00)00191-7 ↗
44. Routa, J., Brännström, H., Anttila, P., Mäkinen, M., Jänis, J., Asikainen, A.: Wood extractives of Finnish pine, spruce and birch—availability and optimal sources of compounds
45. O’Brien, L., Schuck, A., Fraccaroli, C., Pötzelsberger, E., Winkel, G., Lindner, M.: Protecting old-growth forests in Europe—a review of scientific evidence to inform policy implementation. European Forest Institute (2021)10.36333/rs1 ↗
46. Niemz, P., Sonderegger, W., Keplinger, T., Jiang, J., Lu, J.: Physical properties of wood and wood-based materials. In: Niemz, P., Teischinger, A., Sandberg, D. (eds.) Springer Handbook of Wood Science and Technology, pp. 281–353. Springer, Cham (2023)10.1007/978-3-030-81315-4_6 ↗
47. Cavalli, A., Cibecchini, D., Togni, M., Sousa, H.S.: A review on the mechanical properties of aged wood and salvaged timber. Constr. Build. Mater. 114, 681–687 (2016). https://doi.org/10.1016/j.conbuildmat.2016.04.00110.1016/j.conbuildmat.2016.04.001 ↗
48. Machado, J.S., Pereira, F., Quilhó, T.: Assessment of old timber members: importance of wood species identification and direct tensile test information. Constr. Build. Mater. 207, 651–660 (2019). https://doi.org/10.1016/j.conbuildmat.2019.02.16810.1016/j.conbuildmat.2019.02.168 ↗
49. Llana, D.F., González-Alegre, V., Portela, M., Íñiguez-González, G.: Cross Laminated Timber (CLT) manufactured with European oak recovered from demolition: structural properties and non-destructive evaluation. Constr. Build. Mater. 339, 127635 (2022). https://doi.org/10.1016/j.conbuildmat.2022.12763510.1016/j.conbuildmat.2022.127635 ↗
50. Uwizeyimana, P., Perrin, M., Laügt, E., Eyma, F.: Durability study of glulam timber under cyclic moisture loading. Constr. Build. Mater. 315, 125715 (2022). https://doi.org/10.1016/j.conbuildmat.2021.12571510.1016/j.conbuildmat.2021.125715 ↗
51. Wu, Q., Huo, L., Zhu, E., Niu, S., Wang, H.: An investigation of the duration of load of structural timber and the clear wood. Forests 12, 1148 (2021). https://doi.org/10.3390/f1209114810.3390/f12091148 ↗
52. Hoffmeyer, P., Sørensen, J.D.: Duration of load revisited. Wood Sci. Technol. 41, 687–711 (2007). https://doi.org/10.1007/s00226-007-0154-510.1007/s00226-007-0154-5 ↗
53. Falk, R.H., Green, D., Rammer, D., Lantz, S.F.: Engineering evaluation of 55-year-old timber columns recycled from an industrial military building. For. Prod. J. 50, 71–76 (2000)
54. Yokoyama, M., Gril, J., Matsuo, M., Yano, H., Sugiyama, J., Clair, B., Kubodera, S., Mistutani, T., Sakamoto, M., Ozaki, H., Imamura, M., Kawai, S.: Mechanical characteristics of aged Hinoki wood from Japanese historical buildings. Comptes Rendus Phys. 10, 601–611 (2009). https://doi.org/10.1016/j.crhy.2009.08.00910.1016/j.crhy.2009.08.009 ↗
55. Kránitz, K.: Effect of natural aging on wood. http://hdl.handle.net/20.500.11850/98764 (2014)
56. Pandey, K.K.: Study of the effect of photo-irradiation on the surface chemistry of wood. Polym. Degrad. Stab. 90, 9–20 (2005). https://doi.org/10.1016/j.polymdegradstab.2005.02.00910.1016/j.polymdegradstab.2005.02.009 ↗
57. Ranta-Maunus, A.: Effects of climate and climate variations on strength. In: Thelandersson, S., Larsen, H.J. (eds.) Timber Engineering, pp. 153–168. Wiley (2003)
58. Fragiacomo, M., Fortino, S., Tononi, D., Usardi, I., Toratti, T.: Moisture-induced stresses perpendicular to grain in cross-sections of timber members exposed to different climates. Eng. Struct. 33, 3071–3078 (2011). https://doi.org/10.1016/j.engstruct.2011.06.01810.1016/j.engstruct.2011.06.018 ↗
59. Shirmohammadi, M., Leggate, W., Redman, A.: Effects of moisture ingress and egress on the performance and service life of mass timber products in buildings: a review. Constr. Build. Mater. 290, 123176 (2021). https://doi.org/10.1016/j.conbuildmat.2021.12317610.1016/j.conbuildmat.2021.123176 ↗
60. Dömény, J., Koiš, V., Dejmal, A.: Microwave radiation effect on axial fluid permeability in false heartwood of beech (Fagus sylvatica L.). BioResources 9 (2013). https://doi.org/10.15376/biores.9.1.372-38010.15376/biores.9.1.372-380 ↗
61. Granello, G., Palermo, A.: Creep in timber: research overview and comparison between code provisions. 27, 6–22 (2019)
62. Dorez, G., Ferry, L., Sonnier, R., Taguet, A., Lopez-Cuesta, J.-M.: Effect of cellulose, hemicellulose and lignin contents on pyrolysis and combustion of natural fibers. J. Anal. Appl. Pyrolysis 107, 323–331 (2014). https://doi.org/10.1016/j.jaap.2014.03.01710.1016/j.jaap.2014.03.017 ↗
63. Garcia-Castillo, E., Paya-Zaforteza, I., Hospitaler, A.: Analysis of the fire resistance of timber jack arch flooring systems used in historical buildings. Eng. Struct. 243, 112679 (2021). https://doi.org/10.1016/j.engstruct.2021.11267910.1016/j.engstruct.2021.112679 ↗
64. Guibaud, A., Mindeguia, J.-C., Albuerne, A., Parent, T., Torero, J.: Notre-Dame de Paris as a validation case to improve fire safety modelling in historic buildings. J. Cult. Herit. (2023). https://doi.org/10.1016/j.culher.2023.05.00810.1016/j.culher.2023.05.008 ↗
65. Garcia-Castillo, E., Paya-Zaforteza, I., Hospitaler, A.: Fire in heritage and historic buildings, a major challenge for the 21st century. Dev. Built Environ. 13, 100102 (2023). https://doi.org/10.1016/j.dibe.2022.10010210.1016/j.dibe.2022.100102 ↗
66. Bucur, V.: Nondestructive Characterization and Imaging of Wood. Springer, Berlin (2003)10.1007/978-3-662-08986-6 ↗
67. Feio, A., Machado, J.S.: In-situ assessment of timber structural members: combining information from visual strength grading and NDT/SDT methods—a review. Constr. Build. Mater. 101, 1157–1165 (2015). https://doi.org/10.1016/j.conbuildmat.2015.05.12310.1016/j.conbuildmat.2015.05.123 ↗
68. Cruz, H., Yeomans, D., Tsakanika, E., Macchioni, N., Jorissen, A., Touza, M., Mannucci, M., Lourenço, P.B.: Guidelines for on-site assessment of historic timber structures. Int. J. Archit. Herit. 9, 277–289 (2015). https://doi.org/10.1080/15583058.2013.77407010.1080/15583058.2013.774070 ↗
69. Kasal, B., Anthony, R.W.: Advances in in situ evaluation of timber structures. Prog. Struct. Eng. Mater. 6, 94–103 (2004). https://doi.org/10.1002/pse.17010.1002/pse.170 ↗
70. Wheeler, E.A., Baas, P.: Wood identification—a review. IAWA J. 19, 241–264 (1998). https://doi.org/10.1163/22941932-9000152810.1163/22941932-90001528 ↗
71. Williams, D.: “Reading” tool marks on furniture. Chron. Early Am. Ind. Assoc. 61 (2008)
72. Derikvand, M., Kotlarewski, N., Lee, M., Jiao, H., Chan, A., Nolan, G.: Visual stress grading of fibre-managed plantation Eucalypt timber for structural building applications. Constr. Build. Mater. 167, 688–699 (2018). https://doi.org/10.1016/j.conbuildmat.2018.02.09010.1016/j.conbuildmat.2018.02.090 ↗
73. Wang, S.-Y., Chen, J.-H., Tsai, M.-J., Lin, C.-J., Yang, T.-H.: Grading of softwood lumber using non-destructive techniques. J. Mater. Process. Technol. 208, 149–158 (2008). https://doi.org/10.1016/j.jmatprotec.2007.12.10510.1016/j.jmatprotec.2007.12.105 ↗
74. Branco, J.M., Sousa, H.S., Tsakanika, E.: Non-destructive assessment, full-scale load-carrying tests and local interventions on two historic timber collar roof trusses. Eng. Struct. 140, 209–224 (2017). https://doi.org/10.1016/j.engstruct.2017.02.05310.1016/j.engstruct.2017.02.053 ↗
75. Dietsch, P., Tannert, T.: Assessing the integrity of glued-laminated timber elements. Constr. Build. Mater. 101, 1259–1270 (2015). https://doi.org/10.1016/j.conbuildmat.2015.06.06410.1016/j.conbuildmat.2015.06.064 ↗
76. Palma, P., Steiger, R.: Structural health monitoring of timber structures—review of available methods and case studies. Constr. Build. Mater. 248, 118528 (2020). https://doi.org/10.1016/j.conbuildmat.2020.11852810.1016/j.conbuildmat.2020.118528 ↗
77. Thomas, R.E.: Laser scanning of logs and lumber. In: Nondestructive Evaluation of Wood, 2nd edn. (2015)
78. Ross, R.J.: Nondestructive Evaluation of Wood: Second Edition. U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI (2015)
79. Esteves, B., Velez Marques, A., Domingos, I., Pereira, H.: Heat-induced colour changes of pine (Pinus pinaster) and eucalypt (Eucalyptus globulus) wood. Wood Sci. Technol. 42, 369–384 (2008). https://doi.org/10.1007/s00226-007-0157-210.1007/s00226-007-0157-2 ↗
80. Drinkwater, B.W., Wilcox, P.D.: Ultrasonic arrays for non-destructive evaluation: a review. NDT E Int. 39, 525–541 (2006). https://doi.org/10.1016/j.ndteint.2006.03.00610.1016/j.ndteint.2006.03.006 ↗
81. Riggio, M., Sandak, J., Franke, S.: Application of imaging techniques for detection of defects, damage and decay in timber structures on-site. Constr. Build. Mater. 101, 1241–1252 (2015). https://doi.org/10.1016/j.conbuildmat.2015.06.06510.1016/j.conbuildmat.2015.06.065 ↗
82. Osuna-Sequera, C., Llana, D.F., Hermoso, E., Arriaga, F.: Acoustic wave velocity in long pieces of Salzmann pine for in-situ structural assessment. Constr. Build. Mater. 269, 121256 (2021). https://doi.org/10.1016/j.conbuildmat.2020.12125610.1016/j.conbuildmat.2020.121256 ↗
83. Sousa, H.S., Sørensen, J.D., Kirkegaard, P.H., Branco, J.M., Lourenço, P.B.: On the use of NDT data for reliability-based assessment of existing timber structures. Eng. Struct. 56, 298–311 (2013). https://doi.org/10.1016/j.engstruct.2013.05.01410.1016/j.engstruct.2013.05.014 ↗
84. Lourenço, P.B., Feio, A.O., Machado, J.S.: Chestnut wood in compression perpendicular to the grain: non-destructive correlations for test results in new and old wood. Constr. Build. Mater. 21, 1617–1627 (2007). https://doi.org/10.1016/j.conbuildmat.2006.07.01110.1016/j.conbuildmat.2006.07.011 ↗
85. Llana, D.F., Íñiguez-González, G., Arriaga, F., Niemz, P.: Influence of temperature and moisture content on non-destructive measurements in scots pine wood. Wood Res. 59, 769–780 (2014)
86. Ishiguri, F., Matsui, R., Iizuka, K., Yokota, S., Yoshizawa, N.: Prediction of the mechanical properties of lumber by stress-wave velocity and Pilodyn penetration of 36-year-old Japanese larch trees. Holz Als Roh- Werkst. 66, 275–280 (2008). https://doi.org/10.1007/s00107-008-0251-710.1007/s00107-008-0251-7 ↗
87. Llana, D.F.: Influence of temperature and moisture content on non-destructive measurements in Scots pine wood. Wood Res. (2014)
88. Riggio, M., Sandak, J., Sandak, A., Pauliny, D., Babiński, L.: Analysis and prediction of selected mechanical/dynamic properties of wood after short and long-term waterlogging. Constr. Build. Mater. 68, 444–454 (2014). https://doi.org/10.1016/j.conbuildmat.2014.06.08510.1016/j.conbuildmat.2014.06.085 ↗
89. Krähenbühl, A., Kerautret, B., Debled-Rennesson, I., Mothe, F., Longuetaud, F.: Knot segmentation in 3D CT images of wet wood. Pattern Recognit. 47, 3852–3869 (2014). https://doi.org/10.1016/j.patcog.2014.05.01510.1016/j.patcog.2014.05.015 ↗
90. Vössing, K.J., Niederleithinger, E.: Nondestructive assessment and imaging methods for internal inspection of timber. A review. Holzforschung 72, 467–476 (2018). https://doi.org/10.1515/hf-2017-012210.1515/hf-2017-0122 ↗
91. Freyburger, C., Longuetaud, F., Mothe, F., Constant, T., Leban, J.-M.: Measuring wood density by means of X-ray computer tomography. Ann. For. Sci. 66 (2009). https://doi.org/10.1051/forest/200907110.1051/forest/2009071 ↗
92. Lechner, T., Sandin, Y., Kliger, R.: Assessment of density in timber using X-ray equipment. Int. J. Archit. Herit. 7, 416–433 (2013). https://doi.org/10.1080/15583058.2011.64205510.1080/15583058.2011.642055 ↗
93. De Ridder, M., Van den Bulcke, J., Vansteenkiste, D., Van Loo, D., Dierick, M., Masschaele, B., De Witte, Y., Mannes, D., Lehmann, E., Beeckman, H., Van Hoorebeke, L., Van Acker, J.: High-resolution proxies for wood density variations in Terminalia superba. Ann. Bot. 107, 293–302 (2011). https://doi.org/10.1093/aob/mcq22410.1093/aob/mcq224 ↗
94. Shugar, A.N., Drake, B.L., Kelley, G.: Rapid identification of wood species using XRF and neural network machine learning. Sci. Rep. 11, 17533 (2021). https://doi.org/10.1038/s41598-021-96850-210.1038/s41598-021-96850-2 ↗
95. Aichholzer, A., Schuberth, C., Mayer, H., Arthaber, H.: Microwave testing of moist and oven-dry wood to evaluate grain angle, density, moisture content and the dielectric constant of spruce from 8 GHz to 12 GHz. Eur. J. Wood Wood Prod. 76, 89–103 (2018). https://doi.org/10.1007/s00107-017-1203-x10.1007/s00107-017-1203-x ↗
96. Brodie, G., Thanigasalam, D.B., Farrell, P., Kealy, A., French, J.R.J., Ahmed Shiday, B.: An in-situ assessment of wood-in-service using microwave technologies, with a focus on assessing hardwood power poles. Insects 11, 568 (2020). https://doi.org/10.3390/insects1109056810.3390/insects11090568 ↗
97. Rodrigues, B.P., Senalik, C.A., Wu, X., Wacker, J.: Use of ground penetrating radar in the evaluation of wood structures: a review. Forests 12, 492 (2021). https://doi.org/10.3390/f1204049210.3390/f12040492 ↗
98. Hao, Y., Wang, Q., Zhang, S.: Rapid identification of wood species based on portable near-infrared spectrometry and chemometrics methods. 36, 7–13 (2021)
99. Sandak, A., Sandak, J., Prądzyński, W., Zborowska, M., Negri, M.: Near infrared spectroscopy as a tool for characterization of wood surface. Folia Pol Ser B. 40 (2009)10.1016/j.jas.2010.02.005 ↗
100. Pan, X., Li, K., Chen, Z., Yang, Z.: Identifying wood based on near-infrared spectra and four gray-level co-occurrence matrix texture features. Forests 12, 1527 (2021). https://doi.org/10.3390/f1211152710.3390/f12111527 ↗