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Mögeltest av torkade furu, gran och contorta bräder: Sammanfattning av “Mould susceptibility of dried boards of Contorta pine, Scots pine and Norway spruce A comparative study” Faksawat Poohphajai, februari 2018.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-3544-8716
2018 (Swedish)Report (Other academic)
Abstract [sv]

Resultaten av denna jämförande studie av mögelbenägenhet hos torkade splintvedsrika bräder av furu, gran och contorta sammanfattas enligt följande:

  • Med en kombination av hyvling och behandling med mögelhämmande medel Grön-Fri kan risken för mögelpåväxt avsevärt minskas för samtliga träslag jämfört med ohyvlat/ obehandlat virke.

 

  • Även enbart hyvling eller enbart behandling med Grön-Fri minskar mögelpåväxten jämfört med ohyvlat/obehandlat virke. Det går dock inte i denna studie avgöra om någon av dessa två kombinationer är effektivare än den andra.

 

 

  • För obehandlat/ohyvlat virke uppvisar furu signifikant högre mögelgrad jämfört med gran och contorta.

 

  • Tendensen finns att contortan visar lägst mögelbenägenhet men detta bör betraktas med försiktighet då contortavirket innehöll kärnved. Anledningen till detta var att kärnvedsfria contortabräder ej fanns tillgängliga när studien inleddes.
Abstract [en]

The objective of this study is to compare the development of the surface mould growth on dried boards of Pinus contorta (Contorta pine), Pinus sylvestris (Scots pine) and Picea abies (Norway spruce) under the surface treatment conditions of surface planing and an anti-fungal agent Grön-Fri treatment. The main purpose of this study is to investigate, whether Contorta pine and Scots pine can achieve as good durability against mould as Norway spruce by Grön-Fri treatment and surface planing.In this study, dried samples of Contorta pine, Scots pine and Norway spruce were treated by Grön-Fri treatment and surface planing before incubated with mould fungi using an indirect contamination method with three species of surface mould fungi, Penicillium commune, Aspergillus niger and Paecilomyces variotti. The incubation was performed in a climate chamber under a controlled condition at 27°C of temperature and 95% of relative humidity for 21 days. The mould growth on the wood surface was investigated on the basis of the area of contamination by a visual assessment of mould growth.Based on the results of this study, Grön-Fri treatment and surface planing showed a significant inhibitory effect on the mould growth on the dried samples of Norway spruce, Scots pine, and Contorta pine. Furthermore, Grön-Fri treatment in combination with surface planing showed the best result of decreasing the mould growth compared to surface planing without Grön-Fri treatment and Grön-Fri treatment without surface planing. Contorta pine and Scots pine showed as good durability against mould attack as Norway spruce by treatment condition of Grön-Fri treatment and surface planing. The results showed that the durability of the mould surface contaminating fungi on wood can be improved by surface planing and Grön-Fri treatment.

Place, publisher, year, edition, pages
Skellefteå, 2018. , p. 46
Series
TräCentrumNorr
Keywords [sv]
trä, furu, gran, contorta, torkning, mögel
National Category
Engineering and Technology Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-72977OAI: oai:DiVA.org:ltu-72977DiVA, id: diva2:1290773
Projects
TiiN, TräInnovation i Norr
Funder
Swedish Agency for Economic and Regional Growth
Note

Huvuddelen av arbetet har gjorts av Faksawat Poohphajai, student i mastersprogrammet Wood Technology som projektkurs i kursen W7003T Wood Technology Project 2 under hennes andra studieår. Handledare har varit Margot Sehlstedt-Persson, bitr. Professor Träteknik och projektledare för TiiN projektet ”Utveckling av industriell torkning”. 

Faksawats projektrapport författad på engelska finns som bilaga till denna korta sammanfattning av studien.

Available from: 2019-02-21 Created: 2019-02-21 Last updated: 2019-02-28Bibliographically approved

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