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Utvärdering av deplacementmetod med vatten för bestämning av träets torrdensitet.
KTH Träteknologi.
KTH Träteknologi.
KTH, Träteknologi.
1996 (Swedish)Report (Other academic)
Abstract [en]

Evaluation of the deplacement method with water for determination of dry wood density.

by Staffan Carlsson, Stephan Eskilander and Dick Sandberg


A new method (SP-method) for determination of wood density at 12 % moisture content has been developted at the Swedish National testing and Research Institute (SP). The method is a futher development of the deplacement method with water as. The volume of the specimens is determined with use of Archimeds principle. The specimen is immersed in water and a computer program compensate for errors in the measurement as a result of wateruptake in the specimen.

This investigation describes the correlation between the dry density of wood, determined by the SP-method and a "traditional" method. Traditional method means that the dimensions of the specimen are measured with a slide-calliper in order to calculate the volume of the specimen. The test materials were taken from Scots pine and Norway spruce with dimension 40 x 60 x 120 mm.

The results show a difference less than 3 % between dry density determined by the two methods. The correlation coefficient (R2) was 0.99 when linear regression was used. Repetition test showed mean deviation of 0.2 % when dry density for same specimens were determined two times with the SP-method.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 1996. , 16 p.
, TRITA-TRÄ R-96-21, ISSN 1104-2117 ; 21
Keyword [en]
Wood, Density, Scots pine, Norway spruce, deplacement
Keyword [sv]
densitet, trä, deplacement, mätteknik, gran, furu
National Category
Wood Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
URN: urn:nbn:se:lnu:diva-20804ISRN: KTH/TRÄ/R--96/21--SEOAI: diva2:541097
Available from: 2012-08-29 Created: 2012-07-13 Last updated: 2012-08-29Bibliographically approved

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