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

Tsalagkas, Dimitrios; Börcsök, Zoltán; Pásztory, Zoltán

doi:10.1007/s00107-019-01436-5

Cited by 23 publications

(11 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the authors of Reference [ 35 ] stated, bark is less hygroscopic than wood, and the water and humidity sorption/desorption behaviour of WW-based fillers plays an essential role in the heating energy consumption of buildings. Therefore, water vapour permeability tests were conducted, and the results of the water vapour resistance and water vapour diffusion resistance factor are presented in Figure 4 .…”

Section: Resultsmentioning

confidence: 99%

Research of Wood Waste as a Potential Filler for Loose-Fill Building Insulation: Appropriate Selection and Incorporation into Polyurethane Biocomposite Foams

et al. 2020

View full text Add to dashboard Cite

Currently, the recycling potential of wood waste (WW) is still limited, and in a resource efficiency approach, recycling WW in insulation materials, such as polyurethane (PUR), appears as an appropriate solution. It is known that the quality of WW is the main aspect which influences the stability of the final products. Therefore, the current study analyses different WW-based fillers as possible modifiers for polyurethane biocomposite foams for the application as loose-fill materials in building envelopes. During the study of WW-based fillers, it was determined that the most promising filler is wood scobs (WS) with a thermal conductivity of 0.0496 W/m·K, short-term water absorption by partial immersion—12.5 kg/m2, water vapour resistance—0.34 m2·h·Pa/mg and water vapour diffusion resistance factor—2.4. In order to evaluate the WS performance as a filler in PUR biocomposite foams, different ratios of PUR binder and WS filler (PURb/WS) were selected. It was found that a 0.40 PURb/WS ratio is insufficient for the appropriate wetting of WS filler while a 0.70 PURb/WS ratio produced PUR biocomposite foams with the most suitable performance: thermal conductivity reduced from 0.0523 to 0.0476 W/m·K, water absorption—from 5.6 to 1.3 kg/m2, while the compressive strength increased from 142 to 272 kPa and the tensile strength increased from 44 to 272 kPa.

show abstract

Section: Resultsmentioning

confidence: 99%

Research of Wood Waste as a Potential Filler for Loose-Fill Building Insulation: Appropriate Selection and Incorporation into Polyurethane Biocomposite Foams

et al. 2020

View full text Add to dashboard Cite

show abstract

“…With reinforced surfaces, the mechanical properties of bark insulation boards can be enhanced [ 27 ]. Lower TC (0.045 W/m*K) was achieved after alkaline extraction of poplar bark [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Binderless Thermal Insulation Panels Made of Spruce Bark Fibres

et al. 2021

View full text Add to dashboard Cite

Tree bark is a by-product of the timber industry available in large amounts, considering that approximately 10% of the volume of a tree stem is bark. Bark is used primarily for low-value applications such as heat generation or as mulch. To the best of our knowledge, this study is the first one that scrutinises thermal insulation panels made from spruce bark fibres with different densities and fibre lengths manufactured in a wet process. The insulation boards with densities between 160 and 300 kg/m3 were self-bonded. Internal bond, thermal conductivity, and dimensional stability (thickness swelling and water absorption), together with formaldehyde content, were analysed. The thermal properties of the boards were directly correlated with the density and reached about 0.044 W/m*K, while the internal bond was rather influenced by the fibre length and was relatively low (on average 0.07 N/mm2). The water absorption was high (from 55% to 380%), while the thickness swelling remained moderate (up to 23%). The results of this study have shown that widely available bark residues can be successfully utilised as an innovative raw material for efficient eco-friendly thermal insulation products.

show abstract

“…From an economic point of view, bark as a by-product of timber manufacturing is available at low prices [53][54][55]. Previous research shows that the best acoustic properties of bark-based boards as thermal insulation panels are achieved at densities of around 350 kg/m 3 [56,57] and reported on the possibilities of bark insulation panel utilization as a means of absorbing formaldehyde emissions in the indoor environment of buildings. The sound absorption coefficient of spruce and larch bark-based boards was the tested parameter when using selected frequencies between 125 and 4000 Hz [8].…”

Section: Introductionmentioning

confidence: 99%

Acoustic Properties of Larch Bark Panels

Tudor

Krišťák

Barbu

et al. 2021

Forests

View full text Add to dashboard Cite

The potential of tree bark, a by-product of the woodworking industry, has been studied for more than seven decades. Bark, as a sustainable raw material, can replace wood or other resources in numerous applications in construction. In this study, the acoustic properties of bark-based panels were analyzed. The roles of the particle size (4–11 mm and 10–30 mm), particle orientation (parallel and perpendicular) and density (350–700 kg/m3) of samples with 30 mm and 60 mm thicknesses were studied at frequencies ranging from 50 to 6400 Hz. Bark-based boards with fine-grained particles have been shown to be better in terms of sound absorption coefficient values compared with coarse-grained particles. Bark composites mixed with popcorn bonded with UF did not return the expected results, and it is not possible to recommend this solution. The best density of bark boards to obtain the best sound absorption coefficients is about 350 kg/m3. These lightweight panels achieved better sound-absorbing properties (especially at lower frequencies) at higher thicknesses. The noise reduction coefficient of 0.5 obtained a sample with fine particles with a parallel orientation and a density of around 360 kg/m3.

show abstract

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

Cited by 23 publications

References 28 publications

Research of Wood Waste as a Potential Filler for Loose-Fill Building Insulation: Appropriate Selection and Incorporation into Polyurethane Biocomposite Foams

Research of Wood Waste as a Potential Filler for Loose-Fill Building Insulation: Appropriate Selection and Incorporation into Polyurethane Biocomposite Foams

Binderless Thermal Insulation Panels Made of Spruce Bark Fibres

Acoustic Properties of Larch Bark Panels

Contact Info

Product

Resources

About