Investigation of thermal insulation panels made of black locust tree bark

Pásztory, Zoltán; Mohácsiné, Ildikó Ronyecz; Börcsök, Zoltán

doi:10.1016/j.conbuildmat.2017.04.204

Cited by 48 publications

(30 citation statements)

References 12 publications

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“…For instance, the thermal conductivity of larch (Larix decidua) bark panels reported by Kain et al (2014) ranged from 0.069 to 0.093 W/ (m K) depending on the panel's density. Likewise, Pásztory et al (2017) reported that the thermal conductivity of panels made of black locust (Robinia pseudoacacia) was 0.0651 W/ (m K). In addition, the thermal conductivity of low density wooden mats, composed of wood shavings and kenaf fibres was estimated with 0.069 W/(m K) (Nakaya et al 2016).…”

Section: Thermal Conductivitymentioning

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: Thermal Conductivitymentioning

confidence: 99%

“…Kain et al (2013Kain et al ( , 2014 manufactured and tested insulation panels obtained from various softwood bark species for relatively low density boards (< 500 kg/m 3 ). In like manner, Pásztory et al (2017) examined the bark of black locust (Robinia pseudoacacia) trees as raw material for thermal insulation purposes.…”

Section: Introductionmentioning

confidence: 99%

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

2019

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“…The density of most natural materials is lower than that of cement (1200~1300 kg/m 3 ). Natural bark panels were found to have low formaldehyde emissions and appropriate thermal conductivity as thermal insulation materials instead of being burnt [97,98]. Coconut husk and bagasse could be made into low-density thermal insulation boards without the use of chemical adhesives [33].…”

Section: Natural Insulation Materialsmentioning

confidence: 99%

“…10, x FOR PEER REVIEW 11 of Thermal conductivity of different ecological materials[29,49,88,97,[99][100][101][102][103][104][106][107][108][109][110][111][112][113][114][115][116][117][118].…”

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confidence: 99%

Application of Wall and Insulation Materials on Green Building: A Review

et al. 2018

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The construction materials utilized in the building sector have accounted for a large amount of natural resource and energy consumption. Green building, which has developed over three decades, can be regarded as a management and technical approach for building and construction sectors to achieve resource and energy sustainability in building sectors. Therefore, the development and deployment of green construction materials play an important role in the green building field due to the contribution of sustainable resources and energy. To realize the barriers of energy and resources utilization on green building, the development trend, application, and some case studies on wall materials and thermal insulation materials are described. A summary of plant fibers, recycled wastes, and photochromic glass is developed to show applications of green construction materials, which contributes to sustainable development. The challenges and barriers from business, technical, and policy aspects are also reviewed. Finally, perspectives and prospects of green construction material life-cycle framework are illustrated. This paper presents a snapshot review of the importance of wall materials and thermal insulation materials from the point of view of energy and resources consumption.

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“…Structural fire guidance can be found in international codes for timber elements and assemblies [1,2]. However, full-scale tests and specific investigations are frequently required to assess their response under fire exposure conditions (see for example [3][4][5]), loading configurations, as well as to explore the reliability and potential of simplified design methods [6][7][8][9], novel timber-composite systems [10,11], modified material treatments [12], or thermal insulation methods [13,14]. Finite Element (FE) numerical modelling, in this regard, can offer robust support to full-scale testing, at least for preliminary fire resistance considerations [15][16][17][18][19].…”

Section: Introduction and State-of-the-artmentioning

confidence: 99%

Fire Resistance of In-Plane Compressed Log-House Timber Walls with Partial Thermal Insulation

Bedon

Fragiacomo

2018

Buildings

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This paper presents the full-scale experimental assessment of a log-house timber wall with partial thermal insulation under in-plane compression and exposed to fire on one side. A key aspect of the current design application for log-house systems is represented by geometrical details, like cross-sectional properties of logs (typically characterised by high depth-to-width ratios) and outriggers. The latter provides restraint condition for the examined walls and hence markedly affects their overall load-carrying capacity. As a result, careful consideration should be given to the choice of these details, compared to fully monolithic timber walls (i.e., made from cross-laminated timber), due to the possible occurrence of local structural and/or thermo-mechanical mechanisms. This is the case of exceptional loading conditions like fire load, as the fire resistance of these systems could be affected by a multitude of variables, including the presence (even though limited to few surfaces only) of thermal insulation panels. To this aim, the results of a full-scale furnace test are discussed in the paper for a log-wall with partial thermal insulation, namely thermal insulation applied on the outriggers only, under the effects of EN/ISO standard fire conditions. The results of Finite Element (FE) numerical studies are also reported, to further explore the load-carrying performance of the reference log-house specimen and compare it with the experimental observations. Several thermal insulation configurations are finally numerically investigated, showing their effects on the overall fire resistance of the assembly. In accordance with literature, the test shows that the log house's timber wall is suitable to obtain a fire resistance of about 60 min under relevant loading. The FE results are in rather close agreement with the temperature measurements within the section of logs, as well as a qualitative correlation with respect to the mechanical behaviour observed in the full-scale furnace experiment. The key role of outriggers and their thermo-mechanical boundaries, finally, is emphasised.

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Investigation of thermal insulation panels made of black locust tree bark

Cited by 48 publications

References 12 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

Application of Wall and Insulation Materials on Green Building: A Review

Fire Resistance of In-Plane Compressed Log-House Timber Walls with Partial Thermal Insulation

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