Characterization of Wood, Cork and Their Composites for Building Insulation

Gupta, Pragya; Maji, Pradip K.

doi:10.1016/b978-0-12-803581-8.10591-0

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…Suberin also constitutes the 20–50% of the extractive‐free bark weight, whereas the outer bark of the species of Q. suber , is mainly utilized to produce cork stoppers, agglomerates, and composites appropriate for thermal and acoustic insulation. The above findings coincide with a study by Gupta and Maji 32 dealing with suberin examination and utilization. Specifically, they reported that cork, as the outer bark layer, consists of 30% to 50% of suberin and because of the thermal insulation properties that it possesses, suberin makes bark a very promising alternative building and insulation material compared with the conventional ones (among other unique properties such as, insulating properties, hydrophobicity, visco‐elasticity, versatility, etc.).…”

Section: Bark Anatomy and Chemical Compositionsupporting

confidence: 91%

Tree bark utilization in insulating bio‐aggregates: a review

Giannotas

Kamperidou

Barboutis

2021

Biofuels Bioprod Bioref

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This review gives an overview of recent advances in research on the role of tree bark material in bark-cement bio-composites, and their potential as building insulation materials. Suberin and other bark extractives seem to be of great importance for the insulation properties of such composites. Bark is a readily available, biological raw material with unique properties and it has revealed promising results as a bio-insulation material, either alone or in mixtures with different matrices (cement, lime, resins, polymers, etc.). The thermal, mechanical, acoustic, and hygroscopic properties of these bark-insulating composites depend on several factors, primarily the type of tree bark, the density and mechanical strength of the bark, the density of the boards produced, and the ratio of bark material to the binder material used in the board production (cement, lime, resins, polymers, etc.). The size of granules and the thickness of the board produced seem to be factors with a lower impact on the properties of the bark-cement composites. A low proportion of bark fibers or particles (0.5-1%) in bark-cement composites has proven highly beneficial to their mechanical and thermal properties and ensures higher workability of the mixture. Different modification treatments of bark material should be investigated, with the aim of decreasing the bark extractives content, to improving the cement setting, decreasing the unstable hemicellulose components and their hygroscopic nature, improving the bark particles' durability in alkaline environments, and upgrading their adherence properties. As the demand for alternative, sustainable structural materials keeps rising, the cement-bark composites will undoubtedly keep attracting the attention of the scientific and industrial world.

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Section: Bark Anatomy and Chemical Compositionsupporting

confidence: 91%

Tree bark utilization in insulating bio‐aggregates: a review

Giannotas

Kamperidou

Barboutis

2021

Biofuels Bioprod Bioref

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“…Then, the MoR, MoE, and TSPtPS values of BBP slightly higher compared with thermal insulating particleboard reinforced with coconut leaf sheaths (density 410 kg/m 3 , thermal conductivity 0.135 W/m•K, MoR 3.82 MPa, MoE 455 ± 94 MPa, IB 0.05 MPa), which stated to have the potential to be applied as a material building insulation (partition walls, ceiling coatings, and internal doors) (Vidil et al 2016). Indeed in the building insulator sector, mechanical properties are not primary characterizations (Gupta and Maji 2020). However, if thermal insulation materials contributed to building structures, such as those applied to wall and roof surfaces, it requires at least adequate mechanical properties.…”

Section: Thermal Conductivitymentioning

confidence: 99%

Binderless bark particleboard made from gelam (Melaleuca viridiflora Sol. ex Gaertn.) bark waste: The effect of the pressing temperature on its mechanical and physical properties

Christy

Soemarno

Sumarlan

et al. 2021

BioRes

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This study investigated the effects of the pressing temperature on the mechanical and physical properties of binderless bark particleboard made from Gelam bark waste and the improvement of those properties. In addition, the thermal insulation properties of the particleboard were determined. Four different temperatures (140 °C, 160 °C, 180 °C, and 200 °C) were used to make single-layer binderless bark particleboard with a target density of less than or equal to 0.59 g/cm3. Results revealed that the pressing temperature affected the mechanical properties (modulus of rupture, modulus of elasticity, and tensile strength perpendicular to panel surface), which increased as the temperature increased, and the physical properties (thickness swelling and water absorption), which decreased as the temperature increased. Based on the Tukey test, increasing the temperature from 180 to 200 °C did not significantly affect the mechanical or physical properties, except for the tensile strength perpendicular to panel surface. None of the mechanical properties met SNI standard 03-2105-2006 (2006); however, the 12% maximum thickness swelling requirement was met for binderless bark particleboard hot-pressed at 200 °C. Binderless bark particleboard hot-pressed at 200 °C had high water resistance, regardless of its low strength, and a thermal conductivity value of 0.14 W/m∙K.

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“…While natural fibers have impressive mechanical and thermal insulating properties, they are not effective in preventing combustion. The enhancement of the thermal properties of fiberboard by the incorporation of fire-retardant qualities will play a crucial role in fire prevention [16]. The fire retardant qualities of the fiberboard are achieved through the incorporation of chemicals that hinder or postpone the propagation of fire following ignition [17].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Thermal Bio-Insulator From Oil Palm Trunk Fiber: Analysis of Thermal, Physical and Mechanical Properties

Yana,

Husna,

Kusmawati

et al. 2024

IPR

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The majority of air conditioning systems, including both cooling and heating systems, consume a significant amount of electrical energy as a result of their high electrical consumption and prolonged periods of operation. The use of thermal insulation materials in the building can help conserve electrical energy used for room conditioning systems. Natural fibers are used as an alternative in the production of thermal insulation, which is commonly referred to as bio-insulators. The utilization of oil palm trunk (OPT) fiber as the primary material for thermal insulation shows promise. This study aims to determine the specific attributes of OPT fiberboard that make it suitable for use as a thermal bio-insulator. The features examined encompass physical, mechanical, thermal, and fire-resistant attributes. The OPT fiber underwent a treatment process involving boiling at a temperature of 80℃ for a duration of 30 minutes. The fiberboard is manufactured using epoxy adhesive and calcium carbonate additive, and then printed using the hand lay-up process and cold-compaction technique. The physical characteristics of fiberboard indicate that there is a direct relationship between its density and water absorption. Testing revealed that fiberboard has a low thermal conductivity and high heat capacity value. By including calcium carbonate, the burning time of the fiberboard was tested and seen to decrease, indicating a delay in the fiberboard burning process, as evidenced by the extended flame suppression time. The density of OPT fiberboard varies between 0.48 and 0.70 gr/cm3. The absorbency of water is inversely related to its density. Water absorption capacity generally rises with decreased density. The obtained heat capacity value is 1.28-2.38 J⁄(g℃). The mechanical value ranges from 1.00 to 3.55 MPa. The incorporation of calcium carbonate significantly impacts the thermal and mechanical characteristics of the fiberboard. The produced OPT fiberboard satisfies the requirements for good thermal, physical, and mechanical characteristics, making it a suitable bio-insulation material for buildings.

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Characterization of Wood, Cork and Their Composites for Building Insulation

Cited by 12 publications

References 18 publications

Tree bark utilization in insulating bio‐aggregates: a review

Tree bark utilization in insulating bio‐aggregates: a review

Binderless bark particleboard made from gelam (Melaleuca viridiflora Sol. ex Gaertn.) bark waste: The effect of the pressing temperature on its mechanical and physical properties

Fabrication of Thermal Bio-Insulator From Oil Palm Trunk Fiber: Analysis of Thermal, Physical and Mechanical Properties

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