Surface roughness and Shore-D hardness of six tropical hardwoods
DOI:
https://doi.org/10.29352/mill0223e.41753Keywords:
tropical wood; surface roughness; Shore-D hardness; sanding; material propertiesAbstract
Introduction: This study investigates the Shore-D hardness and surface roughness characteristics of six tropical wood species: Canelo (Nectandra spp.), Limbali (Gibertiodendron dewevrei), Difou (Morus mesozygia), Curupay (Anadenanthera macrocarpa), Ebiara (Berlinia bracteosa), and Zwarte kabbes (Diplotropis martiusii), aiming to assess their suitability for high-performance applications.
Objective: To evaluate how wood species and sanding processes influence the mechanical properties and surface quality of selected tropical woods.
Methods: Samples were conditioned and sanded using abrasives of different grit sizes (80, 100, 120, 150, and 180). Surface roughness parameters Ra, Rq, and Rz, as well as Shore-D hardness, were measured. Statistical analyses were performed using ANOVA and Duncan’s test.
Results: Statistical analysis revealed that abrasive grit size significantly affected surface roughness (p < 0.001), with finer grits producing smoother surfaces. Wood species also had a significant effect on both roughness and hardness. Sanding had the greatest influence on Ra, Rq, and Rz parameters. Ebiara exhibited the smoothest surface, while Curupay showed the highest hardness (74.65).
Conclusion: Surface roughness is primarily influenced by sanding grit, whereas hardness is determined by wood species. The results emphasize the importance of tailoring sanding procedures to the wood species in order to optimize surface quality and mechanical performance in industrial and decorative applications.
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Adamčík, L., Giudice, V. L., Todaro, L., Dudiak, M., & Kminiak, R. (2025). Surface roughness of thermally modified and unmodified selected wood species after sanding. European Journal of Wood and Wood Products, 83(3). https://doi.org/10.1007/s00107-025-02260-w
Arndt, K.-F., & Lechner, M. D. (Eds.). (2014). Polymer solids and polymer melts–mechanical and thermomechanical properties of polymers. Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-642-55166-6
ASTM International. (2017). Standard test method for rubber property—Durometer hardness (ASTM D2240-15). ASTM International. https://store.astm.org/d2240-15.html
Aslan, S., Coşkun, H., & Kılıç, M. (2008). The effect of the cutting direction, number of blades and grain size of the abrasives on surface roughness of Taurus cedar (Cedrus Libani A. Rich.) woods. Building and Environment, 43(5), 696–701. https://doi.org/10.1016/j.buildenv.2007.01.048
Ayata, Ü. (2020). Ayous odununun bazı teknolojik özelliklerinin belirlenmesi ve ısıl işlemden sonra renk ve parlaklık özellikleri. Mobilya ve Ahşap Malzeme Araştırmaları Dergisi, 3(1), 22–33. https://doi.org/10.33725/mamad.724596
Bekhta, P., Lis, B., Krystofiak, T., & Bekhta, N. (2022). Surface roughness of varnished wood pre-treated using sanding and thermal compression. Forests, 13(5), 777. https://doi.org/10.3390/f13050777
Carsan, S., Orwa, C., Harwood, C., Kindt, R., Stroebel, A., Neufeldt, H., & Jamnadass, R. (2012). African wood density database. World Agroforestry Centre. https://shre.ink/36oa
Chu, D., Xue, L., Zhang, Y., Kang, L., & Mu, J. (2016). Surface characteristics of poplar wood with high-temperature heat treatment: Wettability and surface brittleness. BioResources, 11(3), 6948–6967. https://doi.org/10.15376/biores.11.3.6948-6967
Darmawan, W., Ginting, M. Br., Gayatri, A., Putri, R. L., Lumongga, D., & Hasanusi, A. (2020). Influence of surface roughness of ten tropical woods species on their surface free energy, varnishes wettability and bonding quality. Pigment & Resin Technology, 49(6), 441–447. https://doi.org/10.1108/prt-01-2020-0005
Devi, R. R., & Maji, T. K. (2012). Study on properties of simul wood (Bombax ceiba L.) impregnated with styrene acrylonitrile copolymer, TiO 2, and nanoclay. Polymer Bulletin, 1–19. https://doi.org/10.1007/s00289-012-0742-x
Esteves, B., Şahin, S., Ayata, U., Domingos, I., Ferreira, J., & Gürleyen, L. (2021). Effect of heat treatment on shore-D hardness of some wood species. BioResources, 16(1), 1482-1495. https://doi.org/10.15376/biores.16.1.1482-1495
ISO. (1976). Standard atmospheres for conditioning and/or testing—Specifications. (ISO554). https://www.iso.org/standard/4635.html
ISO. (2025). Geometrical product specifications (GPS)—Filtration. Part 21: Linear profile filters: Gaussian filters (ISO 16610-21). https://www.iso.org/standard/84786.html
Kang, C.-W., Hashitsume, K., Jang, E.-S., & Kolya, H. (2023). Relationship between wood anatomical features and surface roughness characteristics. Wood Research, 68(3), 455–464. https://doi.org/10.37763/wr.1336-4561/68.3.455464
Karamanoglu, M., & Akyildiz, M. H. (2013). Colour, gloss and hardness properties of heat treated wood exposed to accelerated weathering. Pro Ligno, 9(4), 729–738.
Kilic, M., Hiziroglu, S., & Burdurlu, E. (2006). Effect of machining on surface roughness of wood. Building and Environment, 41(8), 1074–1078. https://doi.org/10.1016/j.buildenv.2005.05.008
Laskowska, A., Piwek, A., Lipska, K., Kłosińska, T., Rybak, K., & Boruszewski, P. (2025). Evaluation of the Selected Surface Properties of European Oak and Norway Maple Wood Sanded with Aluminum Oxide Sandpapers of Different Grits. Coatings, 15(7). https://doi.org/10.3390/coatings15070813
Mattos, B. D., de Cademartori, P. H., Missio, A. L., Gatto, D. A., & Magalhães, W. L. (2015). Wood-polymer composites prepared by free radical in situ polymerization of methacrylate monomers into fast-growing pinewood. Wood Science and Technology, 49(6), 1281–1294. https://doi.org/10.1007/s00226-015-0761-5
Perçin, O., Yeşil, H., Uzun, O., & Bülbül, R. (2024). Physical, mechanical, and thermal properties of heat-treated poplar and beech wood. BioResources, 19(4). https://doi.org/10.15376/biores.19.4.7339-7353
Ratnasingam, J. (2022). Sanding Process. In Furniture manufacturing (pp. 79–88). Springer Singapore. https://doi.org/10.1007/978-981-16-9412-7_7
Reyes, G. (1992). Wood densities of tropical tree species (Vol. 88). U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. https://shre.ink/36qN
Sahin, C. K., & Onay, B. (2020). Alternative wood species for playgrounds wood from fruit trees. Wood Research, 65(1), 149–160. https://doi.org/10.37763/wr.1336-4561/65.1.149160
Şahin, C. K., Topay, M., & Var, A. A. (2020). A study on suitability of some wood species for landscape applications: Surface color, hardness and roughness changes at outdoor conditions. Wood Research, 65(3), 395–404. https://doi.org/10.37763/wr.1336-4561/65.3.395404
Saloni, D. E. (2007). Process monitoring and control system design, evaluation and implementation of abrasive machining processes [Doctoral dissertation, North Carolina State University]. http://www.lib.ncsu.edu/resolver/1840.16/4990
Vitosytė, J., Ukvalbergienė, K., & Keturakis, G. (2012). The effects of surface roughness on adhesion strength of coated ash (Fraxinus excelsior L.) and Birch (Betula L.) Wood. Materials Science, 18(4). https://doi.org/10.5755/j01.ms.18.4.3094
Yan, Y., Dong, Y., Li, J., Zhang, S., Xia, C., Shi, S. Q., & Cai, L. (2015). Enhancement of mechanical and thermal properties of Poplar through the treatment of glyoxal-urea/nano-SiO 2. RSC Advances, 5(67), 54148–54155. https://doi.org/10.1039/C5RA07294H
Yu, Q., Pan, X., Yang, Z., Zhang, L., & Cao, J. (2023). Effects of the surface roughness of six wood species for furniture production on the wettability and bonding quality of coating. Forests, 14(5), 996. https://doi.org/10.3390/f14050996
Zhao, H., Allanson, D., & Ren, X. J. (2015). Use of shore hardness tests for in-process properties estimation/monitoring of silicone rubbers. Journal of Materials Science and Chemical Engineering, 3(07), 142–147. https://doi.org/10.4236/msce.2015.37019
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