Abstract
The set of papers sums up the results of an extensive project to quantify primarily the creep characteristics but also other deformation properties of Norway spruce (Picea abies) and Scots pine (Pinus sylvestris) wood under conditions relevant in the high temperature drying process. The programme included tension experiments on tan-gentially and radially oriented specimens both under wet (saturated, green) conditions and drying conditions at temperatures 95–125 °C. Also, a limited strength test series was carried out with spruce. This first paper contains the documentation of the experimental techniques used as well as reports the results obtained about shrinkage, hygrothermal deformation and modulus of elasticity. The results of the strength tests are also included.
Zusammenfassung
In einer Artikelreihe werden die Ergebnisse eines Forschungsprojektes zur Quantifizierung des Kriechverhaltens, aber auch anderer Verformungen beschrieben, und zwar unter Bedingungen, wie sie bei der Hochtemperaturtrocknung vorliegen. Als Versuchsmaterial wurden nordische Fichte und Kiefer verwendet. Das Programm beinhaltete Prüfungen der Zugfestigkeit von tagential und radial ausgerichteten Proben sowohl im trockenen als auch im waldfrischen Zustand. Die Trocknungstemperaturen lagen bei 95–125 °C. Zusätzlich wurde eine begrenzte Anzahl von Festigkeitsprüfungen an Fichtenholz vorgenommen. Der erste Beitrag enthält die Dokumentation der Versuchstechniken sowie die Ergebnisse bezüglich Schwinden, hy-grothermaler Verformung und MOE, Mit aufgenommen sind auch die Ergebnisse der Festigkeitsprüfung.
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Hanhijärvi, A. Deformation properties of finnish spruce and pine wood in tangential and radial directions in association to high temperature drying. Holz als Roh- und Werkstoff 56, 373–380 (1998). https://doi.org/10.1007/s001070050336
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DOI: https://doi.org/10.1007/s001070050336