Decay resistance of thermally modified Scots pine after 6 years' exposure above ground

Hannu Viitanen, Sini Metsä-Kortelainen, Antti Nurmi, Saila Jämsä

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

In the present study the performance of boards treated by ThermoWoodr process were studied above ground and the results given are based on a "modified" horizontal double- layer test. The base layer of boards was in direct contact with ground and the conditions were much harder than in the standard method. After six years' exposure clear differences were found between untreated Scots pine and treated ones. In all cases thermal modification improved the performance. The greatest differences were discovered in boards located in base and lower boards of the double layer test. The best performed thermally modified pine heartwood, where only very little decay was found in base layer boards laying against the ground. Other layers were not attacked. The same trend was detected with Scots pine sapwood, but already some decay was also present in lower and top layer of boards. The smallest differences between modified and unmodified were found in upper layer of boards, which mainly suffered from blue stain and cracking. Also in this occasion pine heartwood performed better than sapwood boards. In addition, measured moisture content figures were in good correlation with found decay rates.
Original languageEnglish
Title of host publicationProceedings IRG Annual Meeting 2013
Publication statusPublished - 2013
MoE publication typeB3 Non-refereed article in conference proceedings
Event44th IRG Annual Meeting 2013, IRG44 - Stockholm, Sweden
Duration: 16 Jun 201320 Jun 2013

Publication series

NameProceedings IRG Annual Meeting
ISSN (Electronic)2000-8953

Conference

Conference44th IRG Annual Meeting 2013, IRG44
CountrySweden
CityStockholm
Period16/06/1320/06/13
OtherAnnual Meeting of the International Research Group on Wood Protection

Fingerprint

decay resistance
Pinus sylvestris
deterioration
heartwood
sapwood
Pinus
cracking
direct contact
testing
water content
heat
methodology

Keywords

  • decay resistance
  • Scots pine
  • sapwood
  • heartwood
  • thermal modification

Cite this

Viitanen, H., Metsä-Kortelainen, S., Nurmi, A., & Jämsä, S. (2013). Decay resistance of thermally modified Scots pine after 6 years' exposure above ground. In Proceedings IRG Annual Meeting 2013 [IRG/WP 13-40624] Proceedings IRG Annual Meeting
Viitanen, Hannu ; Metsä-Kortelainen, Sini ; Nurmi, Antti ; Jämsä, Saila. / Decay resistance of thermally modified Scots pine after 6 years' exposure above ground. Proceedings IRG Annual Meeting 2013. 2013. (Proceedings IRG Annual Meeting).
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Viitanen, H, Metsä-Kortelainen, S, Nurmi, A & Jämsä, S 2013, Decay resistance of thermally modified Scots pine after 6 years' exposure above ground. in Proceedings IRG Annual Meeting 2013., IRG/WP 13-40624, Proceedings IRG Annual Meeting, 44th IRG Annual Meeting 2013, IRG44, Stockholm, Sweden, 16/06/13.

Decay resistance of thermally modified Scots pine after 6 years' exposure above ground. / Viitanen, Hannu; Metsä-Kortelainen, Sini; Nurmi, Antti; Jämsä, Saila.

Proceedings IRG Annual Meeting 2013. 2013. IRG/WP 13-40624 (Proceedings IRG Annual Meeting).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

TY - GEN

T1 - Decay resistance of thermally modified Scots pine after 6 years' exposure above ground

AU - Viitanen, Hannu

AU - Metsä-Kortelainen, Sini

AU - Nurmi, Antti

AU - Jämsä, Saila

PY - 2013

Y1 - 2013

N2 - In the present study the performance of boards treated by ThermoWoodr process were studied above ground and the results given are based on a "modified" horizontal double- layer test. The base layer of boards was in direct contact with ground and the conditions were much harder than in the standard method. After six years' exposure clear differences were found between untreated Scots pine and treated ones. In all cases thermal modification improved the performance. The greatest differences were discovered in boards located in base and lower boards of the double layer test. The best performed thermally modified pine heartwood, where only very little decay was found in base layer boards laying against the ground. Other layers were not attacked. The same trend was detected with Scots pine sapwood, but already some decay was also present in lower and top layer of boards. The smallest differences between modified and unmodified were found in upper layer of boards, which mainly suffered from blue stain and cracking. Also in this occasion pine heartwood performed better than sapwood boards. In addition, measured moisture content figures were in good correlation with found decay rates.

AB - In the present study the performance of boards treated by ThermoWoodr process were studied above ground and the results given are based on a "modified" horizontal double- layer test. The base layer of boards was in direct contact with ground and the conditions were much harder than in the standard method. After six years' exposure clear differences were found between untreated Scots pine and treated ones. In all cases thermal modification improved the performance. The greatest differences were discovered in boards located in base and lower boards of the double layer test. The best performed thermally modified pine heartwood, where only very little decay was found in base layer boards laying against the ground. Other layers were not attacked. The same trend was detected with Scots pine sapwood, but already some decay was also present in lower and top layer of boards. The smallest differences between modified and unmodified were found in upper layer of boards, which mainly suffered from blue stain and cracking. Also in this occasion pine heartwood performed better than sapwood boards. In addition, measured moisture content figures were in good correlation with found decay rates.

KW - decay resistance

KW - Scots pine

KW - sapwood

KW - heartwood

KW - thermal modification

M3 - Conference article in proceedings

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BT - Proceedings IRG Annual Meeting 2013

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Viitanen H, Metsä-Kortelainen S, Nurmi A, Jämsä S. Decay resistance of thermally modified Scots pine after 6 years' exposure above ground. In Proceedings IRG Annual Meeting 2013. 2013. IRG/WP 13-40624. (Proceedings IRG Annual Meeting).