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Exploratory study on the bending performance of thermo-hydro-mechanically densified Scots pine (Pinus sylvestris L.) at elevated temperatures
InnoRenew CoE, Izola, Slovenia; Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Koper, Slovenia.ORCID iD: 0000-0003-2149-3759
InnoRenew CoE, Izola, Slovenia; Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Koper, Slovenia.ORCID iD: 0000-0002-6544-1400
InnoRenew CoE, Izola, Slovenia; Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Koper, Slovenia.ORCID iD: 0000-0002-8775-8230
Department of Fire-Safe Sustainable Built Environment, Slovenian National Building and Civil Engineering Institute (ZAG), Logatec, Slovenia.ORCID iD: 0000-0001-5351-7909
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2024 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 19, no 3, p. 829-832Article in journal (Refereed) Published
Abstract [en]

Thermo-hydro-mechanical (THM) densification is a well-known wood modification procedure for improving the mechanical properties of low-density wood species, but its performance at elevated temperatures is not well understood. The objective of this study was to determine the bending behaviour of densified Scots pine at elevated temperatures. A total of 48 specimens (200 mm (longitudinonal) × 20 mm (radial) × 20 mm (tangential)) were tested to investigate the bending performance under constant temperatures at 25, 50, 125 and 175°C, respectively. It was found that the modulus of rupture (MOR) and modulus of elasticity (MOE) of both un-densified and densified pine decreased with increasing temperature. However, the densified wood exhibited more brittle shear failure but retained higher MOR and MOE than the untreated specimens treated at the same temperature level. In general, the results demonstrate that densification can be a potentially effective method to retain the mechanical properties of wood at elevated temperatures, thereby having a potential maintain the load-bearing capacity during and after fire.

Place, publisher, year, edition, pages
Taylor & Francis, 2024. Vol. 19, no 3, p. 829-832
Keywords [en]
Densification, fire safety, timber construction, wood
National Category
Wood Science Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-105613DOI: 10.1080/17480272.2024.2350685ISI: 001228182200001Scopus ID: 2-s2.0-85193697044OAI: oai:DiVA.org:ltu-105613DiVA, id: diva2:1861217
Funder
EU, Horizon 2020, 952395
Note

Validerad;2024;Nivå 2;2024-05-27 (hanlid);

Funder: lovenia Research andInnovation Agency (ARIS)

Available from: 2024-05-27 Created: 2024-05-27 Last updated: 2024-11-20Bibliographically approved

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Sandberg, Dick

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