Blog List

Tuesday 19 July 2016

Water absorption of untreated and thermally modified sapwood and heartwood of Pinus sylvestris L.

Published Date
First online: 

Title 

Water absorption of untreated and thermally modified sapwood and heartwood of Pinus sylvestris L.

  • Author 
  • Wolfram Scheiding 
  • Martin Direske
  • Mario Zauer

  • Abstract 

  • Water absorption coefficients of untreated and thermally modified Scots pine (Pinus sylvestris L.) were determined on sapwood and heartwood in longitudinal, radial and tangential direction. Thermal modification was performed under atmospheric pressure and saturated steam at 190 and 210 °C for 3 h. The capillary water uptake of untreated and thermally modified heartwood was lower in all anatomical directions compared to sapwood. The two investigated treatment intensities showed contrary results for capillary water uptake.

  • References 

    1. Biziks V, Andersons B, Belkova L, Kapaca E, Militz H (2013) Changes in the microstructure of birch wood after hydrothermal treatment. Wood Sci Technol 4:717–735CrossRef
    2. Biziks V, Andersons B, Sansonetti E, Andersone I, Militz H, Grinins J (2014) One-stage thermo-hydro treatment (THT) of hardwoods: an analysis of form stability after five soaking-drying cycles. Holzforschung 69(5):563–571
    3. Boonstra MJ (2008) A two-stage thermal modification of wood. PhD Thesis, Ghent University, Belgium, and Université Henry Poincaré—Nancy, France
    4. Hillis WE (1987) Heartwood and tree exudates. Springer-Verlag, Berlin New YorkCrossRef
    5. ISO 15148 (2002) Hygrothermal performance of building materials and products—determination of water absorption coefficient by partial immersion
    6. Krackler V, Ammann S, Camathias U, Niemz P (2011) Untersuchungen zum Feuchteverhalten und zur Porosität von thermisch modifiziertem Holz. (Investigation on moisture behaviour and porosity of thermally modified timber) (In German). Bauphysik 33:374–381CrossRef
    7. Metsä-Kortelainen S, Antikainen T, Viitaniemi P (2006) The water absorption of sapwood and heartwood of Scots pine and Norway spruce heat-treated at 170, 190, 210 and 230 °C. Holz Roh Werkst 64:192–197CrossRef
    8. Pfriem A (2011) Alteration of water absorption coefficient of spruce (Picea abies (L.) Karst.) due to thermal modification. Drvna Ind 311–313
    9. Popper R, Niemz P, Eberle G (2005) Investigations on the sorption and swelling properties of thermally treated wood. Holz Roh Werkst 63:135–148 (in German) CrossRef
    10. Rosenthal M, Bäucker E, Bues C-T (2010) Holzaufbau und Tränkbarkeit. Zum Einfluss der Mikrostruktur des Holzes auf das Eindringverhalten von Flüssigkeiten (Wood structure and impregnability. On the influence of wood microstructure on the immersion behaviour of liquids) (In German) Holz-Zentralblatt 34:852–854
    11. Stamm AJ (1970) Maximum effective pit pore radii of the heartwood and sapwood of six softwoods as affected by drying and resoaking. Wood Fiber 1:263–269
    12. Thomas RJ, Nicholas DD (1966) Pit membrane structure in loblolly pine influenced by solvent exchange drying. For Prod J 16:57–59
    13. Zauer M (2012) Untersuchung zur Porenstruktur und zur kapillaren Wasserleitung im Holz und deren Änderung infolge einer thermischen Modifikation (Investigation on pore structure and on capillary water transport within wood and its alteration due to thermal modification) (In German), Dissertation, Dresden
    14. Zauer M, Pfriem A, Wagenführ A (2013) Toward improved understanding of the cell-wall density and porosity of wood determined by gas pycnometry. Wood Sci Technol 6:1197–1211CrossRef

  • For further details log on website :

No comments:

Post a Comment

Advantages and Disadvantages of Fasting for Runners

Author BY   ANDREA CESPEDES  Food is fuel, especially for serious runners who need a lot of energy. It may seem counterintuiti...