Ayous wood : main uses and selected physical and mechanical properties of an increasingly interesting material originating from cameroon

• Autorzy: Gennari Emiliano , Picchio Rodolfo , Lo Monaco Angela

Identyfikatory

DOI

10.12841/wood.1644-3985.391.09

• Języki publikacji: EN

Abstrakty

EN

Triplochiton scleroxylon K. Schum, commonly named ayous in Cameroon, is a tree typical of secondary forests in subtropical areas mainly below 500 msl, characterized by an uneven distribution of annual rainfall and the presence of disturbance. This species is widely used in the origin area, and the interest of European markets for ayous wood has steadily increased in the last decades. Despite the interest, only a few studies explored the characterization of this wood for its Cameroonian provenience. This study was carried out to provide a general overview of the available information and to determine some selected physical and mechanical properties of ayous wood coming from the department of Boumba et Ngoko in South-east Cameroon. Physical and mechanical properties and colourimetric parameters of ayous wood were determined following the UNI EN and ISO standards to characterize this wood and to compare with the data from literature. Density, 393 kg/m3, resulted consistent with the data reported in the literature; the basic density was lower than those reported in the literature and the difference could be related to wood porosity; volumetric shrinkage was among the lower ones detected by other authors. Colourimetric parameters describing the undifferentiated creamy-yellow colour of the wood were L* 73.08, a* 7.39, b* 27.88. Mechanical properties were in the wide range of data reported by other authors; compression strength 36.6 MPa, static bending strength 61.1 MPa and Brinell hardness 12.2 N/mm2. These results extend our knowledge on the physical, colorimetric and mechanical properties of the ayous wood. These results can be helpful to highlight differences in the physical and mechanical properties due to the influence of origin on wood physical and mechanical properties. Future studies on this topic are needed to better understand the changes in properties and the characterization of the Cameroonian provenance. The results on the properties of ayous wood give an account of the real possibilities of treatments and technologies that can improve the technological characteristics and the environmentally sustainable use of this resource for the origin and importing countries.

Słowa kluczowe

EN

density; shrinkage; colourimetric parameters; compression strength; static bending strength; Brinell hardness

• Wydawca: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
• Czasopismo: Drewno : prace naukowe, doniesienia, komunikaty
• Rocznik: 2022
• Tom: Vol. 65, nr 209
• Strony: art. no. 1644--3985.391.09
• Opis fizyczny: Bibliogr. 40 poz., tab.

Twórcy

autor

Gennari Emiliano

• Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, Via S. Camillo de Lellis, 01100 Viterbo, Italy

• https://orcid.org/0000-0001-6548-792X

autor

Picchio Rodolfo

• Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, Via S. Camillo de Lellis, 01100 Viterbo, Italy

• https://orcid.org/0000-0002-9375-7795

autor

Lo Monaco Angela

• Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, Via S. Camillo de Lellis, 01100 Viterbo, Italy

• https://orcid.org/0000-0001-6816-2899

Bibliografia

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• List of standards
• ISO 13061-13:2016 Determination of radial and tangential shrinkage – Physical and mechanical properties of wood – Test methods for small clear wood specimens. International Organization for Standardization, Geneve, Switzerland
• ISO 13061-3:2014 Determination of ultimate tensile strength in static bending - Physical and mechanical properties of wood – Test methods for small clear wood specimens. International Organization for Standardization, Geneve, Switzerland
• ISO 3129:2019 Wood – Sampling methods and general requirements for physical and mechanical testing of small clear wood specimens. International Organization for Standardization, Geneve, Switzerland
• UNI EN 1534:2020 Wood flooring and parquet - Determination of resistance to indentation - Test method. Ente Nazionale Italiano di Unificazione, Milano, Italy
• UNI EN ISO/CIE 11664-4:2019 Colorimetria - Parte 4: Spazio colore L* a* b* CIE 1976. Ente Nazionale Italiano di Unificazione, Milano, Italy
• UNI ISO 13061-1: 2017 Physical and mechanical properties of wood – Test methods for small clear wood specimens Determination of moisture content for physical and mechanical tests. Ente Nazionale Italiano di Unificazione, Milano, Italy
• UNI ISO 13061-2:2017 Physical and mechanical properties of wood – Test methods for small clear wood specimens Determination of density for physical and mechanical tests. Ente Nazionale Italiano di Unificazione, Milano, Italy
• UNI ISO 3787:1985 Wood - Test methods - Determination of ultimate stress in compression parallel to grain. Ente Nazionale Italiano di Unificazione, Milano, Italy

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).