Water vapour diffusion resistance of larch (Larix decidua) bark insulation panels and application considerations based on numeric modelling

Kain, Günther; Lienbacher, Bernhard; Barbu, Marius Cătălin; Senck, Sascha; Petutschnigg, Alexander

doi:10.1016/j.conbuildmat.2017.12.212

Cited by 18 publications

(15 citation statements)

References 20 publications

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“…According to the study findings, White (1979) indicated that the thin-walled periderm tissue sorbs water about three times slower and the thick-walled one thirty times slower than the wood xylem, as reported by Kain et al (2018). In this study, the processing parameters and conditions were identical.…”

Section: Tc [W/ (M•k)]supporting

confidence: 61%

“…Even though bark is less hygroscopic than wood, water flux and humidity sorption and desorption behaviour of bark panels play an essential role in the heating energy consumption of buildings (Kain et al 2018). Therefore, diffusion properties, usually expressed by the water vapour resistance factor (μ-value), are another important attribute of characterizing insulation materials.…”

Section: Tc [W/ (M•k)]mentioning

confidence: 99%

“…Further, an influence of the coefficients of variation range on the values of water vapour flux was also revealed among the wood-based panels (such as OSB, plywood, coated and uncoated boards), due to the diverse particle sizes among the wood-based panels or the bonding interaction of the coated or overlaid boards. Kain et al (2018) concluded that the vapour flow through larch bark insulation panels was significantly influenced by the panel structure of void, and that the most important factor influencing the water vapour diffusion resistance was board density. According to these authors (Kain et al 2018), the panel structure, in terms of particle orientation and particle size, proved to have a minor influence on the panel`s vapour permeability, which could be a result of low variation.…”

Section: Tc [W/ (M•k)]mentioning

confidence: 99%

“…Kain et al (2018) concluded that the vapour flow through larch bark insulation panels was significantly influenced by the panel structure of void, and that the most important factor influencing the water vapour diffusion resistance was board density. According to these authors (Kain et al 2018), the panel structure, in terms of particle orientation and particle size, proved to have a minor influence on the panel`s vapour permeability, which could be a result of low variation. However, fine particles presented a lower compression resistance compared to coarse ones and are possibly compressed more strongly during hot pressing, thus affecting the density of panels.…”

Section: Tc [W/ (M•k)]mentioning

confidence: 99%

“…In addition, wood and bark anatomical cell characteristics have been shown to influence sorption behaviour of wood and wood-based panels. For instance, Neimsuwan et al (2008) indicated that earlywood of small loblolly pine had greater sorption rates and diffusion coefficients than latewood, while Water absorption (WA) and thickness swelling (TS) percentages after 24 h water immersion dependent on paper and fibreglass type Kain et al (2018) cited an investigation in which the vapour diffusion through the periderm of hemlock was studied.…”

Section: Tc [W/ (M•k)]mentioning

confidence: 99%

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Thermal, physical and mechanical properties of surface overlaid bark-based insulation panels

2019

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In terms of reduced energy consumption and simultaneously promoting woody biomass sustainability, researchers are seeking energy-efficient materials, originating from forestry and agricultural residues, for application in the building sector. In this study, bark-based panels overlaid on both surfaces with three different fibreglass types and two types of paper sheets were evaluated for potential utilization as thermal insulation panels. The proposed panels were then characterized regarding their thermal conductivity, physical, and mechanical properties such as density, water absorption, thickness swelling, surface soundness, bending strength and modulus of elasticity. It was found that thermal conductivity values ranged from 0.067 to 0.074 W/(m K) for all the produced panels. As suggested from the results, fibreglass overlays exhibited improved performance compared to paper sheet overlaying. In addition, the fibreglass overlaid bark-based panels displayed promising characteristics as insulation materials. Finally, fibreglass woven fabric was found to be more beneficial than the mesh and mat fibreglass types.

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Section: Tc [W/ (M•k)]supporting

confidence: 61%

Section: Tc [W/ (M•k)]mentioning

confidence: 99%

Section: Tc [W/ (M•k)]mentioning

confidence: 99%

Section: Tc [W/ (M•k)]mentioning

confidence: 99%

Section: Tc [W/ (M•k)]mentioning

confidence: 99%

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Thermal, physical and mechanical properties of surface overlaid bark-based insulation panels

2019

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Qualitative investigation on VOC-emissions from spruce (Picea abies) and larch (Larix decidua) loose bark and bark panels

Kain

Stratev²,

Tudor

et al. 2020

Eur. J. Wood Prod.

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Tree bark is an interesting source for various building and furniture materials. It holds a high number of volatile components—resulting in emissions whose effects on building residents have to be considered. Spruce and larch barks were dried using different methods and prepared as loose particles and panels. The VOC (volatile organic compound) emissions after 3 and 14 days were measured in a small chamber using gas chromatography and coupled mass spectroscopy. The influence of bark type, drying method, hot pressing and time on the emissions was quantified. The total volatile organic compounds (TVOC) emissions from spruce bark were higher than those from larch bark. High-temperature treatment and time significantly decrease TVOC emissions from the investigated barks. Terpenes, aldehydes and acids were analysed in the emitting gases. The high temperatures whilst pressing panels are problematic due to furfural constitution. Its emissions and partly those of 2-octenal and acetic acid are relevant for present and upcoming evaluation schemes. Aldehydes are the critical substance when using bark in the interior and must be controlled in product development.

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Investigation of some physical and thermal insulation properties of honeycomb-designed panels produced from Calabrian pine bark and cones

Efe

2022

Eur. J. Wood Prod.

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Water vapour diffusion resistance of larch (Larix decidua) bark insulation panels and application considerations based on numeric modelling

Cited by 18 publications

References 20 publications

Thermal, physical and mechanical properties of surface overlaid bark-based insulation panels

Thermal, physical and mechanical properties of surface overlaid bark-based insulation panels

Qualitative investigation on VOC-emissions from spruce (Picea abies) and larch (Larix decidua) loose bark and bark panels

Investigation of some physical and thermal insulation properties of honeycomb-designed panels produced from Calabrian pine bark and cones

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