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Combined treatment of green pitch pine wood by heat and superheated steam and the effects on physical properties of the products

Authors
  • Park, Yonggun
  • Eom, Chang-Deuk
  • Han, Yeonjung
  • Park, Jun-Ho
  • Chang, Yoon-Seong
  • Yang, Sang-Yun
  • Choi, Joon-Weon
  • Yeo, Hwanmyeong
Type
Published Article
Journal
Holzforschung
Publisher
De Gruyter
Publication Date
Sep 21, 2013
Volume
68
Issue
3
Pages
327–335
Identifiers
DOI: 10.1515/hf-2013-0054
Source
De Gruyter
Keywords
License
Yellow

Abstract

Pitch pine (P. rigida) wood was treated with superheated steam (SHS) and the subsequent effects due to drying and heat treatment (HT) were observed. The following treatment parameters were tested: 180°C air HT, 220°C air HT, 0.1 MPa–180°C SHS HT, 0.1 MPa–220°C SHS HT, 0.5 MPa–180°C SHS HT, and 0.5 MPa–220°C SHS HT. No drying checks were observed in the specimens (500×150×50 mm3) treated at 0.5 MPa–220°C SHS and with these treatment parameters, equilibrium moisture content (EMC) was the lowest. Low EMC has an effect on physical properties such as shrinkage, compressive strength parallel to the grain, bending strength, hardness, and decay resistance. Based on the results, it is expected that the green wood in a large scale is possible to be simultaneously dried and heat-treated without occurrence of checks by the SHS HT process.

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