End grain water absorption and redistribution in slow-grown and fast-grown Norway spruce (Picea abies (L.) Karst.) heartwood and sapwood

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Wood is susceptible to decay by rot fungi if it is exposed to high-moisture contents during long periods of time and it is therefore important to limit the duration of such periods. Critical points in outdoor wood structures are, for example, end grain surfaces in joints where water can get trapped after a rain. It is therefore of interest to study both absorption and redistribution of moisture in wood. This paper presents moisture content profiles during end grain water absorption and redistribution in Norway spruce (Picea abies (L.) Karst.) measured by computed tomography with the specimens in individual climate boxes. Heartwood and sapwood of two provenances (slow-grown and fastgrown wood) were included. No major differences were seen between the water uptake of the slow-grown and the fast-grown wood since the densities were similar despite of the large difference in growth ring width. However, for the sapwood specimens, the moisture content was higher further into the specimens than for the heartwood specimens in agreement with previous studies. For the slow-grown wood, the redistribution was also generally more rapid for the sapwood specimens than for the heartwood specimens.

Detaljer

Författare
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Materialteknik

Nyckelord

Originalspråkengelska
Sidor (från-till)245-252
TidskriftWood Material Science & Engineering
Volym8
Utgivningsnummer4
StatusPublished - 2013
PublikationskategoriForskning
Peer review utfördJa

Relaterad forskningsoutput

Maria Fredriksson, 2013, Division of Building Materials, LTH, Lund University.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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