Moisture content influence on the thermal conductivity of insulating building materials made from date palm fibers mesh

Boukhattem, Lahcen; Boumhaout, Mustapha; Hamdi, Hassan; Benhamou, Brahim; Nouh, Fatima Ait

doi:10.1016/j.conbuildmat.2017.05.020

Cited by 92 publications

(56 citation statements)

References 37 publications

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“…The utilization of date palm fiber as filler has been studied by numerous researchers. Several literatures reported the use of date palm fibers as mortar reinforcement for insulating materials in building [20][21][22][23]. Nevertheless, based on our literatures survey, there were few studies about the use of date palm fibers as natural filler in polymeric materials [19,[24][25][26], and thus make this research field more interesting.…”

Section: Introductionmentioning

confidence: 90%

Processing and properties of high density polyethylene/date palm fiber composites prepared by a laboratory mixing extruder

Chafidz¹,

Rizal²,

Rm³

et al. 2018

JMES

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In this work, "green" composites made from High Density Polyethylene (HDPE) and natural fiber based date palm fiber have been prepared and studied. The effects of different loadings of date palm fibers (DPF) on the morphological, thermal and melt rheological properties of the composites have been investigated. Morphological investigation showed that the fibers were evenly dispersed in HDPE matrix at all DPF loadings. Additionally, the results of differential scanning calorimetry (DSC) analysis revealed that the addition of the DPF in the HDPE matrix has slightly increased the crystallization temperature (ΔT = ± 1.33 ºC). However, the crystallinity index, Xc of the composites at all DPF loadings were lower than the neat HDPE. The decrease of Xc was approximately 10.5-14 %. Differential scanning calorimetry (DSC) analysis results revealed that the addition of the DPF into the HDPE matrix has increased the crystallization temperature. However, the crystallinity index of the composites at all DPF loadings were lower than the neat HDPE. In term of melt rheological analysis, the complex viscosity of the composites were all higher than the HDPE matrix and increased with the increase of DPF loadings, which was due to the restriction of the HDPE chain segment movements as the amount of DPF increased.

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Section: Introductionmentioning

confidence: 90%

Processing and properties of high density polyethylene/date palm fiber composites prepared by a laboratory mixing extruder

Chafidz¹,

Rizal²,

Rm³

et al. 2018

JMES

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show abstract

“…However, it should be noted that the main disadvantage to these fibres is that, typically, they have poor durability and because they are natural, they may degrade by natural means over time [9,14]. Another disadvantage of plant fibres is that they are hydrophilic [15].…”

Section: Types and Properties Of Fibresmentioning

confidence: 99%

“…Natural materials tend to have good thermal insulation properties and can enhance the regulation of temperature and humidity, hence they show strong potential when being used in thermal applications, such as passive houses and low-energy green houses, as less auxiliary comfort will be required [18]. Other benefits of using natural fibres include good adhesion properties, availability, renewability, low-cost, no pollution or toxins are produced [15], biodegradability, easy extraction, and high toughness [14]. Furthermore, plant materials and fibres can retain dust, reduce noise levels and can help act as a shield against the sunlight and weathering effects when placed in the structural envelope [18].…”

Section: Types and Properties Of Fibresmentioning

confidence: 99%

Amazing Types, Properties, and Applications of Fibres in Construction Materials

et al. 2019

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Fibres have been used in construction materials for a very long time. Through previous research and investigations, the use of natural and synthetic fibres have shown promising results, as their presence has demonstrated significant benefits in terms of the overall physical and mechanical properties of the composite material. When comparing fibre reinforcement to traditional reinforcement, the ratio of fibre required is significantly less, making fibre reinforcement both energy and economically efficient. More recently, waste fibres have been studied for their potential as reinforcement in construction materials. The build-up of waste materials all around the world is a known issue, as landfill space is limited, and the incineration process requires considerable energy and produces unwanted emissions. The utilisation of waste fibres in construction materials can alleviate these issues and promote environmentally friendly and sustainable solutions that work in the industry. This study reviews the types, properties, and applications of different fibres used in a wide range of materials in the construction industry, including concrete, asphalt concrete, soil, earth materials, blocks and bricks, composites, and other applications.

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“…Ochs et al [9] measured thermal conductivity data of (bulk) insulation including inorganic artificial and natural products at high temperature and at elevated moisture content and provided the conclusions that the ETC of insulation materials increases with increasing temperature and moisture content. The relationship between the experimental ETC values and the moisture content within some fibrous insulating building materials can be expressed as a non-linear fit [10] or linear fit [11] at a specified operating temperature. Other studies have also showed that the presence of these moisture contents leads to the increase ETC of moist fibers to a great extent from their drying state [12,13], and therefore to the decrease of their insulation capacity.…”

Section: Introductionmentioning

confidence: 99%

“…A series-parallel hybrid models (^-) which assumed a cubical geometry were also developed by Krischer-Kroll [23]. In the hybrid model, volume fraction y of layers oriented perpendicular to the direction of heat flow is arranged in series with the complementary fraction (1−y) of layers oriented parallel to the direction of heat flow.The hybrid model has found successful predictions in fibrous moist building materials and unsaturated soils of layers oriented parallel to the direction of heat flow.The hybrid model has found successful predictions in fibrous moist building materials and unsaturated soils [10,24,25].…”

Section: Introductionmentioning

confidence: 99%

Investigating the effective thermal conductivity of moist fibrous fabric based on Parallel-Series model: a consideration of material’s swelling effect

Zhu

2020

Mater. Res. Express

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The aim of this work reported in the paper is to investigate the influence of moisture content on the effective thermal conductivity (ETC) of non-hygroscopic Polyethylene terephthalate (PET) and hygroscopic Viscose (VC) fabrics using Parallel-Series (P-S) thermal-electrical analogy method and TPS measurement. An equivalent porosity for hygroscopic fabric was first proposed to preserve the validity of the P-S model. The equivalent porosity is characterized by reasonably eliminating the absorbed moisture effects partly, which is embodied in enhancing heat conduction, endothermic reaction and swelling. Calculated values of the effective thermal conductivity of the two kinds of fabrics had been compared with experimental measurements. Results show that the P-S model incorporated with equivalent porosity is found to yield higher prediction accuracy than that of P-S model with parent porosity. The calibrated model can also provide a robust tool for predicting the global effective thermal conductivity of moist hygroscopic fibrous porous media. Nomenclature P-SParallel-Series ETC Effective thermal conductivity ΔP pressure difference r pore-throat radius || parallel ⊥ series T temperature

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Moisture content influence on the thermal conductivity of insulating building materials made from date palm fibers mesh

Cited by 92 publications

References 37 publications

Processing and properties of high density polyethylene/date palm fiber composites prepared by a laboratory mixing extruder

Processing and properties of high density polyethylene/date palm fiber composites prepared by a laboratory mixing extruder

Amazing Types, Properties, and Applications of Fibres in Construction Materials

Investigating the effective thermal conductivity of moist fibrous fabric based on Parallel-Series model: a consideration of material’s swelling effect

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