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Investigation on natural durability and sorption properties of Italian Chestnut (Castanea sativa Mill.) from coppice stands

Untersuchung der natürlichen Dauerhaftigkeit und Sorptionseigenschaften von Esskastanienholz aus Niederwaldgebieten Italiens

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Castanea sativa

Mill.) from coppice stands in Italy were evaluated. Fungi trials with different white rot, brown rot and soft rot fungi showed, that the heartwood of chestnut can be classified following EN 350 in durability class 2 as “durable”. However, the durability within the tested material (between trees and planks) can vary considerably. The highest reported durability was class 1 (very durable), whereas other samples were classified as “non-durable” (class 5). Under soil conditions, where soft rot organism are active, the variation within the tested collective was lower, however resulting in an average “moderate durability” (class 3). No statistical provable difference between juvenile wood and mature wood was detected. Furthermore, sorption properties and subsequent shrinkage and swelling were determined. Mature wood shows somewhat higher sorption properties and transverse shrinkage/swelling values than juvenile wood. However, longitudinal shrinkage is higher for juvenile wood.

Gloeophyllum trabeum, Coniophora puteana

und Trametes versicolor) ergaben gemäß EN 350 für das getestete Esskastanien-Kernholz im Durchschnitt die Resistenzklasse 2. Die Unterschiede zwischen den Probebäumen und den einzelnen Holzproben waren jedoch teilweise beträchtlich. Für Holzproben im Erdkontakt wurde im Durchschnitt eine Resistenzklasse 3 ermittelt. Der Vergleich zwischen juvenilem und adultem Holz hinsichtlich der natürlichen Dauerhaftigkeit führte zu keinem statistisch abgesicherten Ergebnis. Bei den Untersuchungen der Sorptionseigenschaften zeigte das adulte Holz der Esskastanie im Unterschied zum juvenilem Holz etwas höhere Quellungs- und Schwindungswerte. In der Längsrichtung der Holzproben jedoch wurden an juvenilem Holz höhere Schwindungswerte ermittelt.

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Militz, H., Busetto, D. & Hapla, F. Investigation on natural durability and sorption properties of Italian Chestnut (Castanea sativa Mill.) from coppice stands. Holz als Roh- und Werkstoff 61, 133–141 (2003). https://doi.org/10.1007/s00107-002-0357-2

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  • DOI: https://doi.org/10.1007/s00107-002-0357-2

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