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Collapse free pre-drying of Eucalyptus regnans F. Muell

Vortrocknung von Eukalyptus-Schnittholz ohne Kollaps

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Abstract

Collapse is often the source of differential shrinkages which can lead to internal checking Previous work indicates that the amount of collapse present in dried eucalypt sawn timber is strongly reliant on the temperature of drying. This work tests the idea of drying at temperatures below a collapse threshold temperature to avoid collapse altogether. Successful preliminary tests were conducted on Eucalyptus regnans F. Muell.

Zusammenfassung

Kollaps ist oft die Ursache für lokales Schwinden, das zu innerer Rißbildung führt. Frühere Arbeiten wiesen darauf hin, daß die Anzahl kollabierter Bereiche in getrocknetem Eukalyptusholz straff korreliert ist mit der Trocknungstemperatur. In dieser Studie wird die Möglichkeit untersucht, unterhalb der Temperaturschwelle der Rißbildung zu trocknen, um dadurch den Kollaps ganz zu vermeiden.Erste erfolgreiche Versuche wurden an Schnittholz von Eukalyptus regnans F. Muell. durchgeführt.

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Abbreviations

AE:

Acoustic emission

EMC:

Equilibrium moisture content

EW:

Earlywood

FSP:

Fibre saturation point

L-T:

Longitudinal-tangential slice

LW:

Latewood

MC:

Moisture content

R-T:

Radial-tangential slice

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Authors and Affiliations

  1. Department of Civil and Mechanical Engineering, University of Tasmania, GPO Box 252C, 7001, Hobart, Tasmania, Australia

    T. C. Innes

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  1. T. C. Innes
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Innes, T.C. Collapse free pre-drying of Eucalyptus regnans F. Muell . Holz als Roh-und Werkstoff 53, 403–406 (1995). https://doi.org/10.1007/s001070050119

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  • DOI: https://doi.org/10.1007/s001070050119

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