Acoustical and thermal characterization of sustainable materials derived from vegetable, agricultural, and animal fibers

Bousshine, Said; Ouakarrouch, Mohamed; Bybi, Abdelmajid; Laaroussi, Najma; Garoum, Mohammed; Tilioua, Amine

doi:10.1016/j.apacoust.2021.108520

Cited by 45 publications

(16 citation statements)

References 42 publications

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“…The measurements of the sound absorption coefficient and the sound reduction index are carried out using a Kundt's tube (impedance tube) (Figure 4) according to the standard protocol ISO 10534-2 (ISO, 2001). The operating principle and modeling are described in the reference (Bousshine et al, 2022).…”

Section: Experimental Methodsmentioning

confidence: 99%

Sustainable thermo-acoustical insulation material from cardboard waste and natural fibers: Elaboration and performance evaluation

Ouakarrouch

Laaroussi

Garoum

et al. 2022

Journal of Building Physics

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The main objective of this paper is to elaborate and characterize new ecological composites based on cardboard waste and abandoned natural fibers, in the Drâa-Tafilalet region (South-East, Morocco), for the manufacture of local thermo-acoustical insulation panels. For this study, 25 samples were prepared by mixing 60% of cardboard waste and 40% of vegetable fibers (Reed tree, esparto fiber, fig tree, and Olive tree). The morphological analysis of the different fibers was carried out by scanning electron microscopy (SEM), while, the physical, thermal, and acoustical properties of samples were measured experimentally using standard methods. The experimental results showed that all new composites have better thermal and acoustical performances comparable to those of synthetic insulation materials. The density, thermal conductivity, thermal diffusivity, and sound absorption coefficient of those composites were in the range of 278.6–343.8 kg/m3; 0.072–0.10 W/m·K; 1254.5–1807.5 J/kg·K; 0.4–0.8, respectively. Consequently, the by-products recovered in this study are good candidates for the development of local insulation materials with useful properties for thermal and acoustical insulation applications in buildings, low environmental impact, low cost, and competition with commercialized synthetic insulation materials.

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Section: Experimental Methodsmentioning

confidence: 99%

Sustainable thermo-acoustical insulation material from cardboard waste and natural fibers: Elaboration and performance evaluation

Ouakarrouch

Laaroussi

Garoum

et al. 2022

Journal of Building Physics

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“…Fibres of natural origin, including sheep wool, linen and hemp, are materials with high potential to be used in the manufacture of products with barrier properties in the field of acoustic and thermal insulation. Recently, there has been an increase in interest in ecological insulation materials made from renewable raw materials as well as waste materials, including textile waste [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Blend Composition on Barrier Properties of Insulating Mats Produced from Local Wool and Waste Bast Fibres

et al. 2023

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This paper concerns the management of natural waste fibres. The aim of this research was the production of multifunctional acoustic and thermal insulation materials from natural protein and lignocellulosic fibre wastes, according to a circular bioeconomy. For the manufacture of the materials, local mountain sheep wool and a mixture of bast fibre waste generated by string production were used. Insulating materials in the form of mats produced by the needle-punching technique with different fibre contents were obtained. The basic parameters of the mats, i.e., the thickness, surface weight and air permeability were determined. To assess barrier properties, sound absorption and noise reduction coefficients, as well as thermal resistance and thermal conductivity, were measured. It was shown that the mats exhibit barrier properties in terms of thermal and acoustic insulation related to the composition of the mat. It was found that mats with a higher content of the bast fibres possess a greater ability to absorb sounds, while mats with higher wool contents exhibit better thermal insulation properties. The produced mats can serve as a good alternative to commonly used acoustic and thermal insulating materials. The production of the described materials allows for a reduction in the amount of natural fibre waste and achieves the goal of “zero waste” according to the European Green Deal strategy.

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“…In this context, the improvement of thermal comfort is ensured especially for the inhabitants of dry climate regions by increasing the quality of thermal insulation of building materials historically used in these regions. Research [1][2][3][4][5][6][7][8][9] has been carried out to improve the thermal behavior of clay or plaster by combining them with additives of animal or vegetable origin. These additives are generally dispersed and randomly oriented in the matrix.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Thermal Properties of Ecological Materials Based on Plaster and Clay

Lkouen¹,

Lamrani²,

Meskini³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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Most of the energy savings in the building sector come from the choice of the materials used and their microphysical properties. In the present study, through numerical simulations a link is established between the thermal performance of composite materials and their microstructures. First, a two-phase 3D composite structure is modeled, then the RSA (Random Sequential Addition) algorithm and a finite element method (FE) are applied to evaluate the effective thermal conductivity of these composites in the steady-state. In particular, building composites based on gypsum and clay, consolidated with peanut shell additives and/or cork are considered. The numerically determined thermal conductivities are compared with values experimentally calculated using the typical tools of modern metrology, and with available analytical models. The calculated thermal conductivities of the clay-based materials are 0.453 and 0.301 W.m −1 .K −1 with peanut shells and cork, respectively. Those of the gypsum-based materials are 0.245 and 0.165 W.m −1 .K −1 with peanut shells and cork, respectively. It is shown that, in addition to its dependence on the volume fraction of inclusions, the effective thermal conductivity is also influenced by other parameters such as the shape of inclusions and their distribution. The relative deviations, on average, do not exceed 6.8%, which provides evidence for the reliability of the used approach for random heterogeneous materials.

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Acoustical and thermal characterization of sustainable materials derived from vegetable, agricultural, and animal fibers

Cited by 45 publications

References 42 publications

Sustainable thermo-acoustical insulation material from cardboard waste and natural fibers: Elaboration and performance evaluation

Sustainable thermo-acoustical insulation material from cardboard waste and natural fibers: Elaboration and performance evaluation

Effect of Blend Composition on Barrier Properties of Insulating Mats Produced from Local Wool and Waste Bast Fibres

Numerical Analysis of the Thermal Properties of Ecological Materials Based on Plaster and Clay

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