Acoustical properties of materials made of vegetable particles with several scales of porosity

Glé, Philippe; Gourdon, Emmanuel; Arnaud, Laurent

doi:10.1016/j.apacoust.2010.11.003

Cited by 204 publications

(120 citation statements)

References 24 publications

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“…To replace the use of steel, fiberglass, polypropylene, or nylon as reinforcements for concrete and mortar, natural fibers are proving to be a low-cost, environmentally-friendly alternative. Various laboratories and research groups around the world have conducted studies on construction materials based on or reinforced with plant fibers (Ramis et al 2010;Glé et al 2011;Oldham et al 2011;Asdrubali et al 2012;Ekici et al 2012;Suhawati et al 2013). Among the natural reinforcing filler materials the fique fiber appears to be one of the most promising fibers, due to its high mechanical strength (Delvasto et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Material Based on Short Natural Fique Fibers

Navacerrada¹,

Díaz²,

Fernández³

2014

BioResources

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Fique is a biodegradable natural fiber derived from the Colombian Agavaceae family, originating in tropical America and traditionally used for the manufacture of packaging and cordages. Today, however, new uses are being developed. To meet the need for new good-quality, sustainable, low-cost construction materials for social housing, construction materials have been produced that combine different kinds of natural fibers, including fique, to improve their strength and physical properties. To assess these potential new construction materials made with fique fiber, we have characterized samples of different grammages and thicknesses manufactured using short fique fibers extracted from long fibers. We have measured the sound absorption coefficient at normal incidence in an impedance tube, air flow resistivity, and thermal conductivity as a function of grammage.

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Section: Introductionmentioning

confidence: 99%

Characterization of a Material Based on Short Natural Fique Fibers

Navacerrada¹,

Díaz²,

Fernández³

2014

BioResources

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“…Hempcrete is a material whose acoustic properties can vary greatly depending on the properties of its components and the way in which it is put to use [79,80]. In particular, the results presented herein highlight that the parameters of installation have a far stronger influence than the properties of the components, with the apparent density of the material and the binder-to-shiv mass ratio playing an important part (Fig.…”

Section: Acoustic Propertiesmentioning

confidence: 84%

Overview on Biobased Building Material made with plant aggregate

2016

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Global warming, energy savings, and life cycle analysis issues are factors that have contributed to the rapid expansion of plant-based materials for buildings, which can be qualified as environmental-friendly, sustainable and efficient multifunctional materials. This review presents an overview on the several possibilities developed worldwide about the use of plant aggregate to design bio-based building materials. The use of crushed vegetal aggregates such as hemp (shiv), flax, coconut shells and other plants associated to mineral binder represents the most popular solution adopted in the beginning of this revolution in building materials. Vegetal aggregates are generally highly porous with a low apparent density and a complex architecture marked by a multi-scale porosity. These geometrical characteristics result in a high capacity to absorb sounds and have hygro-thermal transfer ability. This is one of the essential characteristics which differ of vegetal concrete compared to the tradition mineral-based concretes. In addition, the high flexibility of the aggregates leads to a non-fragile elasto-plastic behavior and a high deformability under stress, lack of fracturing and marked ductility with absorbance of the strains ever after having reached the maximum mechanical strength. Due to the sensitivity to moisture, the assessment of the durability of vegetal concrete constitutes one of the next scientific challenging of bio-based building materials.

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“…Due to both summer cooling and winter heating needs, the thermal characteristics and performance of external walls play a key role in creating a comfortable indoor climate. In addition to thermal properties, the acoustical demand of buildings, including sound absorption and sound insulation, is of great importance in order to reduce the impact of urban noise [8,26]. The thermal and acoustic properties of biomass materials have been widely studied recently [27,28].…”

Section: Biomass Materials In Building Constructionmentioning

confidence: 99%

“…From a thermal properties point of view, a building insulation material can be defined in terms of thermal conductivity (λ) for steady state and thermal diffusivity (D) for unsteady state conditions [26]. Hence in this study, the thermal characterization of the samples was carried out by using the Transient Plane Source (TPS) technique implemented within a Hot Disk TPS 2500 experimental facility (Hot Disk AB Company, Gothenburg, Sweden), which allows one to evaluate both these properties by means of a single measurement [45,46].…”

Section: Thermal Characterizationmentioning

confidence: 99%

Sustainable New Brick and Thermo-Acoustic Insulation Panel from Mineralization of Stranded Driftwood Residues

et al. 2016

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Abstract:There is considerable interest recently in by-products for application in green buildings. These materials are widely used as building envelope insulators or blocks. In this study, an experimental study was conducted to test stranded driftwood residues as raw material for possible thermo-acoustic insulation panel and environmentally sustainable brick. The thermal and acoustic characteristics of such a natural by-product were examined. Part of samples were mineralized by means of cement-based additive to reinforce the material and enhance its durability as well as fire resistance. Several mixtures with different sizes of ground wood chips and different quantities of cement were investigated. The thermo-acoustic in-lab characterization was aimed at investigating the thermal conductivity, thermal diffusivity, volumetric specific heat, and acoustic transmission loss. All samples were tested before and after mineralization. Results from this study indicate that it is possible to use stranded driftwood residues as building materials with competitive thermo-acoustic properties. In fact, the thermal conductivity was shown to be always around 0.07 W/mK in the unbound samples, and around double that value for the mineralized samples, which present a much higher volumetric specific heat (1.6 MJ/m 3 K) and transmission loss capability. The lignin powder showed a sort of intermediate behavior between the unbound and the mineralized samples.

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Acoustical properties of materials made of vegetable particles with several scales of porosity

Cited by 204 publications

References 24 publications

Characterization of a Material Based on Short Natural Fique Fibers

Characterization of a Material Based on Short Natural Fique Fibers

Overview on Biobased Building Material made with plant aggregate

Sustainable New Brick and Thermo-Acoustic Insulation Panel from Mineralization of Stranded Driftwood Residues

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