Design and properties of a new sustainable construction material based on date palm fibers and lime

Belakroum, R.; Gherfi, A.; Kadja, Mahfoud; Maalouf, Chadi; Lachi, Mohammed; Wakil, Nadim El; Mai, T.H.

doi:10.1016/j.conbuildmat.2018.06.196

Cited by 61 publications

(41 citation statements)

References 37 publications

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“…The MBV of Pavaboard (3.2) is 9% higher than that of Pavaflex (3.3.2). However, in many studies carried out in climatic chambers, it has been proven that the internal structure, and especially the particle size distribution, has a greater effect on moisture uptake than the density [16,36,38].…”

Section: Moisture Buffering Testmentioning

confidence: 99%

Moisture Buffering of Multilayer Internal Wall Assemblies at the Micro Scale: Experimental Study and Numerical Modelling

Kaczorek

2019

Applied Sciences

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In this paper, a series of experiments assessing the moisture buffer value (MBV) of four internal wall assembly samples made from hygroscopic materials was performed. A modified Nordtest protocol was used. Moisture buffer values of all the investigated wall assemblies, with varying moisture loads in the range of 50% to 80%, showed a moderate moisture buffer value (MBV: 0.5–1.0 (g·m−2·%RH−1)). The results showed that in a wall assembly where the MBV of the whole assembly is lower than the MBV of the outer layers, the moisture-buffering capacity of the inner layer is untapped. Outer layers affect inner layers by changing their moisture-buffering capacity, which in turn changes the overall performance of the whole assembly. In addition, it was observed that if the penetration depth value of the outer layer is greater than its thickness, vapour reaches into the deeper layer and wall assemblies made of layers with materials characterized by a lower value of penetration depth reach steady state more slowly. The WUFI Pro tool was used to compare the simulated and experimental results. Despite the discrepancies between these results, it offers a simplified method, helping designers make decisions about which materials to choose to improve the moisture-buffering effect.

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Section: Moisture Buffering Testmentioning

confidence: 99%

Moisture Buffering of Multilayer Internal Wall Assemblies at the Micro Scale: Experimental Study and Numerical Modelling

Kaczorek

2019

Applied Sciences

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“…However, their production processes consume high amounts of non-renewable resources and have a strong environmental impact, especially in terms of greenhouse gas emissions [2]. Therefore, several researchers have proposed developing new construction materials with low thermal conductivity by using natural materials, such as agricultural residues, including wheat straw [3], barley straw [4], rice straw [5], date palm fibers [6], olive stone [7], and coconut and durian mixtures [8].…”

Section: Introductionmentioning

confidence: 99%

Laboratory and In-Situ Measurements for Thermal and Acoustic Performance of Straw Bales

et al. 2019

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This paper investigates the performance of timber-framed walls insulated with straw bales, and compares them with similar walls containing expanded polystyrene (EPS) instead of straw bales. First, thermal conductivity, initial water content, and density of the straw bales were experimentally measured in a laboratory set-up, and the dependence of the thermal conductivity of the dry material on temperature was described. Then, the two insulation solutions were compared by looking at their steady and periodic thermal transmittance, decrement factor, phase shift, internal areal heat capacity and surface mass. Finally, the acoustic performance of both wall typologies was analyzed by means of in situ measurements in two-story buildings built in Southern Italy. The weighted apparent sound reduction index for the partition wall between two houses and the weighted standardized level difference for the façades were assessed based on ISO Standard 16283. The results indicate that the dry straw bales have an average thermal conductivity of k = 0.0573 W/(m·K), and their density is around 80 kg/m3. In addition, straw bale walls have good steady thermal performance, but they still lack sufficient thermal inertia, as witnessed by the low phase shift and the high periodic thermal transmittance. Finally, according to the on-site measurements, the results underline that the acoustic performance of the straw bale walls is far better than the walls adopting traditional EPS insulation. Overall, the straw bales investigated are a promising natural and sustainable solution for thermal and sound insulation of buildings.

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“…The origin of these materials can be vegetable or animal so that their manufacturing has a low environmental impact due to the energy saved in the production process [1]. The use of natural fibers as raw material for acoustic applications have been intensively studied [2][3][4][5][6][7][8][9][10][11][12][13][14], especially in recent years. Many industries are moving toward natural material-based, environmentally friendly products [15,16].…”

Section: Introductionmentioning

confidence: 99%

Innovative Use of Sheep Wool for Obtaining Materials with Improved Sound-Absorbing Properties

et al. 2020

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In recent years, natural materials are becoming a valid alternative to traditional sound absorbers due to reduced production costs and environmental protection. This study explores alternative usage of sheep wool as a construction material with improved sound absorbing properties beyond its traditional application as a sound absorber in textile industry or using of waste wool in the textile industry as a raw material. The aim of this study was to obtain materials with improved sound-absorbing properties using sheep wool as a raw material. Seven materials were obtained by hot pressing (60 ÷ 80 °C and 0.05 ÷ 6 MPa) of wool fibers and one by cold pressing. Results showed that by simply hot pressing the wool, a different product was obtained, which could be processed and easily manipulated. The obtained materials had very good sound absorption properties, with acoustic absorption coefficient values of over 0.7 for the frequency range of 800 ÷ 3150 Hz. The results prove that sheep wool has a comparable sound absorption performance to mineral wool or recycled polyurethane foam.

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Design and properties of a new sustainable construction material based on date palm fibers and lime

Cited by 61 publications

References 37 publications

Moisture Buffering of Multilayer Internal Wall Assemblies at the Micro Scale: Experimental Study and Numerical Modelling

Moisture Buffering of Multilayer Internal Wall Assemblies at the Micro Scale: Experimental Study and Numerical Modelling

Laboratory and In-Situ Measurements for Thermal and Acoustic Performance of Straw Bales

Innovative Use of Sheep Wool for Obtaining Materials with Improved Sound-Absorbing Properties

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