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Effect of ponding, steaming and drill perforation on preservative treatment of fir wood (Abies cephallonica L.) with CCB

Der Einfluß von Wasserlagerung, Dämpfung und Perforation durch Anbohren auf die schützende Behandlung des Tannenholzes (Abies cephallonica L.) mit CCB

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Abstract

Wood from fir (Abies cephallonica L.) in round form (length 1.20 m, diameter 14–20 cm) and in the form of beams (length 1.25 m, 5 cm×7 cm in cross section) were impregnated with 2% CCB by the full cell process after or without a pre-treatment of ponding, steaming or drill perforation. Each pre-treatment caused a significant increase of the dry salt retention and the impregnated area in fir logs and sapwood beams. Drill perforation was the most effective pre-treatment causing full impregnation of sapwood beams. Between ponding and steaming the differences were relatively small but uniform penetration was achieved only in round wood after ponding. The significantly increased penetrability, caused by the three pre-treatments under the described specific conditions, widens the uses of fir wood but it doesn’t meet the requirements of retention for the most difficult conditions in service.

Zusammenfassung

Tannenholz (Abies cephallonica L.) als Rundholz (Länge 1,20 m, Durchmesser 14–20 cm) und in Form von Balken (Länge 1,25 m, Querschnitt 5 cm×7 cm) ohne und nach einer Vorbehandlung mit Wasserlagerung, Dämpfung und Perforation durch Anbohren wurde mit CCB bei Anwendung des Volltränkungsverfahrens imprägniert. Jede Vorbehandlung bewirkte eine bedeutende Zunahme der aufgenommenen Menge des trockenen Salzes und der imprägnierten Fläche des Rundholzes und der Balken aus Splintholz. Die Perforation erwies sich als die beste Vorbehandlung; denn sie erbrachte eine Volltränkung der Splintholzbalken. Zwischen der Wasserlagerung und der Dämpfung gab es relativ kleine Unterschiede, aber ein gleichmäßiges Eindringen des Tränkmittels in das Rundholz wurde nur nach Wasserlagerung erreicht. Die bedeutende Verbesserung der Tränkbarkeit, die durch die drei Vorbehandlungen unter den beschriebenen speziellen Bedingungen erzielt wurde, erweitert die Verwendungen des Tanneholzes; jedoch erfüllt sie nicht die Forderungen der Tränkmittelaufnahmemenge, die für besonders schwere Beanspruchungsbedingungen gestellt werden.

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Authors and Affiliations

  1. Dept. of Forestry, Institute of Technological Education, Larissa, Greece

    J. A. Kakaras

  2. School of Forestry and Natural Environment, Aristotelian University, 54006, Thessaloniki, Greece

    E. V. Voulgaridis

Authors
  1. J. A. Kakaras
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  2. E. V. Voulgaridis
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Additional information

This study is based on part of the results of the Ph.D. “Preservation of Greek wood species with water soluble preservatives” by J. A. Kakaras (in Greek)

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Kakaras, J.A., Voulgaridis, E.V. Effect of ponding, steaming and drill perforation on preservative treatment of fir wood (Abies cephallonica L.) with CCB. Holz als Roh-und Werkstoff 50, 275–279 (1992). https://doi.org/10.1007/BF02615350

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