Environmentally friendly protection of European beech against fire and fungal decay using a combination of thermal modification and mineralisation

Repič, Rožle (author), Pondelak, Andreja (author), Kržišnik, Davor (author), Humar, Miha (author), Knez, Nataša (author), Knez, Friderik (author), Sever Škapin, Andrijana (author)

The demand for construction timber is continuously increasing, due to its favourable characteristics. However, the adequate protection of wood is key to its successful use, as it is flammable and susceptible to biodegradation. Given that thermal modification enhances the durability of wood, and mineralisation with CaCO$_3$ considerably improves its fire properties, it is worth considering the combined effects of the two methods. European beech (Fagus sylvatica) was selected to determine the effects of a) thermal modification, b) mineralisation through the in-situ formation of CaCO$_3$, and c) a combination of the two procedures, on resistance to decay fungi, reaction to fire and the mechanical properties of the wood. Microscopic analysis and comparisons of the samples before and after exposure to fungi were also conducted. Mineralised wood generally had a slightly alkaline pH value and higher equilibrium moisture content, while thermal modification lowered the equilibrium moisture content. The present study demonstrated the combined effect of thermal modification and mineralisation: the best response to fire as well as resistance to fungi was achieved when the two treatments were combined. Results from the Brinell hardness and three-point bending tests indicate that both modification procedures can slightly impair the mechanical properties of the wood.

• Language: English
• Keywords: wood, protection, durability, mechanical properties
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: Str. 33–44
• Numbering: Vol. 19, no. 1
• PID: 20.500.12556/RUL-154916
• UDC: 620.1/.2
• ISSN on article: 1748-0280
• DOI: 10.1080/17480272.2023.2223508
• COBISS.SI-ID: 157967107
• Publication date in RUL: 08.03.2024

Record is a part of a journal

• Title: Wood material science & engineering
• Shortened title: Wood mater. sci. eng
• Publisher: Taylor & Francis
• ISSN: 1748-0280
• COBISS.SI-ID: 522172953

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: les, zaščita, trajnost, mehanske lastnosti