Performance Characterization of Broad Band Sustainable Sound Absorbers Made of Almond Skins
In order to limit the environmental impact caused by the use of non-renewable resources, a growing research interest is currently being shown in the reuse of agricultural by-products as new raw materials for green building panels. Moreover, the European directives impose the goal of sustainability s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/23/5474 |
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| author | Stefania Liuzzi Chiara Rubino Pietro Stefanizzi Francesco Martellotta |
| author_facet | Stefania Liuzzi Chiara Rubino Pietro Stefanizzi Francesco Martellotta |
| author_sort | Stefania Liuzzi |
| collection | DOAJ |
| description | In order to limit the environmental impact caused by the use of non-renewable resources, a growing research interest is currently being shown in the reuse of agricultural by-products as new raw materials for green building panels. Moreover, the European directives impose the goal of sustainability supporting the investigation of passive solutions for the reduction of energy consumption. Thus, the promotion of innovative building materials for the enhancement of acoustic and thermal insulation of the buildings is an important issue. The aim of the present research was to evaluate the physical, acoustical, and thermal performances of building panels produced by almond skin residues, derived from the industrial processing of almonds. In this paper different mix designs were investigated using polyvinyl acetate glue and gum Arabic solution as binders. Air-flow resistivity σ and normal incidence sound absorption coefficient α were measured by means of a standing wave tube. Thermal conductivity λ, thermal diffusivity α, volumetric heat capacity <i>ρc</i> were measured using a transient plane source device. Finally, water vapor permeability <i>δ<sub>p</sub></i> was experimentally determined using the dry cup method. Furthermore, a physical characterization of the specimens in terms of bulk density <i>ρ<sub>b</sub></i> and porosity <i>η</i> allowed to study the correlation existing between the binder and the aggregates and the consequent acoustical and hygrothermal behavior occurring on the different mix designs. The achieved results suggested the investigated materials comparable to the main products currently existing on the market. |
| first_indexed | 2024-03-10T14:23:56Z |
| format | Article |
| id | doaj.art-13e62eda4fbe40449d87c799f856c0a3 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T14:23:56Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-13e62eda4fbe40449d87c799f856c0a32023-11-20T23:06:20ZengMDPI AGMaterials1996-19442020-12-011323547410.3390/ma13235474Performance Characterization of Broad Band Sustainable Sound Absorbers Made of Almond SkinsStefania Liuzzi0Chiara Rubino1Pietro Stefanizzi2Francesco Martellotta3Department of Civil Engineering Sciences and Architecture, Polytechnic University of Bari, via Orabona 4, I-70125 Bari, ItalyDepartment of Civil Engineering Sciences and Architecture, Polytechnic University of Bari, via Orabona 4, I-70125 Bari, ItalyDepartment of Civil Engineering Sciences and Architecture, Polytechnic University of Bari, via Orabona 4, I-70125 Bari, ItalyDepartment of Civil Engineering Sciences and Architecture, Polytechnic University of Bari, via Orabona 4, I-70125 Bari, ItalyIn order to limit the environmental impact caused by the use of non-renewable resources, a growing research interest is currently being shown in the reuse of agricultural by-products as new raw materials for green building panels. Moreover, the European directives impose the goal of sustainability supporting the investigation of passive solutions for the reduction of energy consumption. Thus, the promotion of innovative building materials for the enhancement of acoustic and thermal insulation of the buildings is an important issue. The aim of the present research was to evaluate the physical, acoustical, and thermal performances of building panels produced by almond skin residues, derived from the industrial processing of almonds. In this paper different mix designs were investigated using polyvinyl acetate glue and gum Arabic solution as binders. Air-flow resistivity σ and normal incidence sound absorption coefficient α were measured by means of a standing wave tube. Thermal conductivity λ, thermal diffusivity α, volumetric heat capacity <i>ρc</i> were measured using a transient plane source device. Finally, water vapor permeability <i>δ<sub>p</sub></i> was experimentally determined using the dry cup method. Furthermore, a physical characterization of the specimens in terms of bulk density <i>ρ<sub>b</sub></i> and porosity <i>η</i> allowed to study the correlation existing between the binder and the aggregates and the consequent acoustical and hygrothermal behavior occurring on the different mix designs. The achieved results suggested the investigated materials comparable to the main products currently existing on the market.https://www.mdpi.com/1996-1944/13/23/5474agro-wastesound absorptionhygrothermal performancessustainable materialscircular economy |
| spellingShingle | Stefania Liuzzi Chiara Rubino Pietro Stefanizzi Francesco Martellotta Performance Characterization of Broad Band Sustainable Sound Absorbers Made of Almond Skins Materials agro-waste sound absorption hygrothermal performances sustainable materials circular economy |
| title | Performance Characterization of Broad Band Sustainable Sound Absorbers Made of Almond Skins |
| title_full | Performance Characterization of Broad Band Sustainable Sound Absorbers Made of Almond Skins |
| title_fullStr | Performance Characterization of Broad Band Sustainable Sound Absorbers Made of Almond Skins |
| title_full_unstemmed | Performance Characterization of Broad Band Sustainable Sound Absorbers Made of Almond Skins |
| title_short | Performance Characterization of Broad Band Sustainable Sound Absorbers Made of Almond Skins |
| title_sort | performance characterization of broad band sustainable sound absorbers made of almond skins |
| topic | agro-waste sound absorption hygrothermal performances sustainable materials circular economy |
| url | https://www.mdpi.com/1996-1944/13/23/5474 |
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