Elaboration and characterization of clay-sand composite based on Juncus acutus fibers

Omrani, Hamed; Hassini, Lamine; Benazzouk, Amar; Béji, H.; Elcafsi, Afif

doi:10.1016/j.conbuildmat.2019.117712

Cited by 28 publications

(12 citation statements)

References 31 publications

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“…These results are confirmed by several studies, Omrani et al [35] showed that the addition of 20% Juncus acutus fibers decreased the thermal conductivity from 0.902 W/m K for the reference sample (without fibers) to a value of 0.327 W/m K. The incorporation of biomass fibers (cork) into an earthen material resulted in a thermal conductivity varying around 0.35 to 0.55 W/m K [34]. Brzyski et al [36] incorporated hemp shives and flax straw in a mixture that also included lime and cement, reaching values of about 0.112 W/m K.…”

Section: Thermophysical Propertiessupporting

confidence: 87%

Experimental Investigation of Thermal and Mechanical Properties of Clay Reinforced with Typha australis: Influence of Length and Percentage of Fibers

Abbassi

Ngo

et al. 2020

Waste Biomass Valor

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This study presents the elaboration and characterization of a composite material based on Typha australis and clay for the use of an innovative building material in construction. For this purpose, various percentages ranging from 0 to 55% with a pitch of 15 were used. The aim is to find a better compromise between the thermal and mechanical properties of this composite material. According to this, the influence of the length of the 1 cm and 3 cm fibers was studied. As Typha australis is very porous, the hydric properties of the material studied in this work show that its porosity increases the rate of water absorption following a logarithmic law and the mass loss of the composite material evolves exponentially as a function of time. The mass increases when the percentage of fibers is low. The thermophysical property of Typha australis is 0.06 W/m K. That property allows us to state that Typha australis can be used for thermal insulation. The thermophysical properties of the composite material show that the thermal conductivity decreases as the percentage and length of fibers increase. In fact, the thermal conductivity of the clay is 1.03 W/m K while the mixture of clay with 55% of 1 cm fibers gave a thermal conductivity of 0.146 W/m K. The mixture of clay with the same percentage of 3 cm fibers gave a thermal conductivity of 0.113 W/m K. Nevertheless, the fibers have a negative effect on the mechanical properties and the increase in the length of the fibers improves the flexural strength.

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Section: Thermophysical Propertiessupporting

confidence: 87%

Experimental Investigation of Thermal and Mechanical Properties of Clay Reinforced with Typha australis: Influence of Length and Percentage of Fibers

Abbassi

Ngo

et al. 2020

Waste Biomass Valor

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“…Therefore, the rst bene t of using vegetable bers is the lightness of the samples. This result has been previously indicated by several studies [27][28][29][30][31]. However, it can be seen the small effect of increasing length.…”

Section: Resultssupporting

confidence: 86%

“…It can be observed that the introduction of Alfa bers allows better control of cracks propagation, which delays the rupture phase. This behavior of the incorporation of plant bers in composites has been noted by other authors [19,30,35,36 ]; it may be attributed to increased toughness and because the bers at the crack zone bear the tensile stress transferred from the ruptured section.…”

Section: The Effect Of Alfa On the Breaking Mannersupporting

confidence: 75%

Elaboration and characterization of earth-sand adobe bricks reinforced by Alfa fibers

Sadouri

Benyoucef

Cherradi

2022

Preprint

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The main aim of this work is to investigate the effect of Alfa fiber length and quantities on linear shrinkage, mechanical strength, and failure manner of the reinforced material as compared to the unreinforced mix, by the incorporation of Alfa fibers in earth-sand building material. The earth-based composite consisted of a mixture of earth 60 wt% and sand 40 wt% reinforced with various lengths and rates of fibers extracted from the Alfa plant. First, fibers' tensile strength and water absorption were evaluated to understand their behavior. Moreover, tests have been conducted on prismatic specimens 40x40x160 mm3 with different cutting lengths (1, 2, and 3 cm). These fibers were added to soil at various weight ratios (1%, 1.5%, and 2%). The results have indicated that the incorporation of 2%wt of fibers reduced the unit weight from 1849 kg/m3 to 1632 kg/m3, which results in a slight material. The experimental investigation has shown also that the unreinforced adobe specimens had a high linear shrinkage rate and low mechanical behavior compared to fibrous samples. Specially, specimens with a higher fiber content of 2%wt of 3 cm length were revealed to be the most suitable in terms of mechanical behavior. Moreover, fibers prevent and delay crack propagation, where fiber length and content play a principal role in crack attenuating. Despite the improvement of mechanical properties, the microstructural observation of the reinforced composite shows poor fiber/matrix adhesion, which affects negatively the compactness of the adobe specimens.

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“…The B-CEB shows an important displacement before the failure. The different behavior corroborate the result of many researchers such as Khoudja et al [35], Omrani et al [44].…”

Section: Mechanical Properties Of B-cebssupporting

confidence: 90%

Mechanical, Thermal and Hydric Behavior of the Bio-sourced Compressed Earth Block (B-CEB) Added to Peanut Shells Powder

Sory¹,

Ouédraogo²,

Messan³

et al. 2022

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Elaboration and characterization of clay-sand composite based on Juncus acutus fibers

Cited by 28 publications

References 31 publications

Experimental Investigation of Thermal and Mechanical Properties of Clay Reinforced with Typha australis: Influence of Length and Percentage of Fibers

Experimental Investigation of Thermal and Mechanical Properties of Clay Reinforced with Typha australis: Influence of Length and Percentage of Fibers

Elaboration and characterization of earth-sand adobe bricks reinforced by Alfa fibers

Mechanical, Thermal and Hydric Behavior of the Bio-sourced Compressed Earth Block (B-CEB) Added to Peanut Shells Powder

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