Thermal modification influences on permeability and sorption properties of wooden shingles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F18%3A43914768" target="_blank" >RIV/62156489:43410/18:43914768 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.ldf.mendelu.cz/28934-" target="_blank" >https://www.ldf.mendelu.cz/28934-</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Thermal modification influences on permeability and sorption properties of wooden shingles

Popis výsledku v původním jazyce

Wooden shingles are one of the most traditional roof coverings used to repair historic wooden objects to preserve the traditional character of folk architecture (Policinska-Serwa and Jakimowicz, 2013, Kolmačka et al., 2016). Wood-water interaction has always been one of the main issues when using wood in the built environment. As a natural and heterogeneous material, the properties of wood, such as dimensions, mechanical properties and bio-durability may change when wood is exposed to wet conditions. Wood adjust its moisture content during service life according to the surrounding environment relative humidity conditions (Čermák et al., 2016). Such repeated cycles in exposed shingles cause tension that create microscopic cracks in its structure (Buchanan et al., 1990, Buchanan 1992). The quality of wooden shingles is influenced by the manufacturing process - manual splitting and machine cutting. During splitting, there is no breakage of wood fibers compared to the machine cutting. The surface of the machine cut wood is more prone to water leakage than manually splitted wood. Wood modifications, such as thermal modification, allow considerable reduction or even elimination of natural disadvantages of wood. It&apos;s successful and efficient method to decrease equilibrium moisture content (EMC) of wood and consequently improving its dimensional stability and biological durability (Hill, 2006). The aim of the presented research is to analyze the influence of wooden shingles manufactured in two different ways (splitting and cutting), and thermal modification on the permeability and sorption properties of wood used for roof covering.

Název v anglickém jazyce

Thermal modification influences on permeability and sorption properties of wooden shingles

Popis výsledku anglicky

Wooden shingles are one of the most traditional roof coverings used to repair historic wooden objects to preserve the traditional character of folk architecture (Policinska-Serwa and Jakimowicz, 2013, Kolmačka et al., 2016). Wood-water interaction has always been one of the main issues when using wood in the built environment. As a natural and heterogeneous material, the properties of wood, such as dimensions, mechanical properties and bio-durability may change when wood is exposed to wet conditions. Wood adjust its moisture content during service life according to the surrounding environment relative humidity conditions (Čermák et al., 2016). Such repeated cycles in exposed shingles cause tension that create microscopic cracks in its structure (Buchanan et al., 1990, Buchanan 1992). The quality of wooden shingles is influenced by the manufacturing process - manual splitting and machine cutting. During splitting, there is no breakage of wood fibers compared to the machine cutting. The surface of the machine cut wood is more prone to water leakage than manually splitted wood. Wood modifications, such as thermal modification, allow considerable reduction or even elimination of natural disadvantages of wood. It&apos;s successful and efficient method to decrease equilibrium moisture content (EMC) of wood and consequently improving its dimensional stability and biological durability (Hill, 2006). The aim of the presented research is to analyze the influence of wooden shingles manufactured in two different ways (splitting and cutting), and thermal modification on the permeability and sorption properties of wood used for roof covering.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20502 - Paper and wood

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů