Synergic effect of fiber and matrix treatments for vegetable fiber reinforced cement of improved performance

Ballesteros, Julian Eduardo Mejia; Mármol, Gonzalo; Filomeno, Rafael; Rodier, Loïc; Savastano, Holmer; Savastano, Holmer

doi:10.1016/j.conbuildmat.2019.02.007

Cited by 50 publications

(17 citation statements)

References 67 publications

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“…The higher deformability and the ductile failure combination lead to restrain a risk of cracking of specimen when post-cracking phase is attained. Similar behavior has been observed by several authors when vegetable materials were used as mineral aggregates replacement in concrete-based different binder types [34,35].…”

Section: The Influence Of Hemp Particles On the Compressive Strengthsupporting

confidence: 88%

Performance Improved of a Lime and Hemp-Based Concrete through the Addition of Metakaolin

Daher¹,

Benazzouk²,

Hamed³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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This work describes in detail the experimental investigation of the physico-mechanical properties of nonstructural hemp concrete (usually used as insulating wall material) when the Air-lime based Tradial PF70 binder is partially replaced using Metakaolin. The objective is to reduce the amount of free Ca 2+ ions in the binder as these are responsible for the degradation of vegetables particles and can therefore induce a loss of mechanical performances. In order to assess the effectiveness of pozzolanic reaction, amounts of 0%, 10%, and 20% vol. of Air-lime binder were replaced by the Metakaolin material, while testing the mechanical properties of concrete specimens containing 200% and 300% of hemp particles. Through SEM and EDX analysis, a tight relationship has been found to exist between the Metakaolin content and physical-mechanical properties of specimen. The pozzolanic reaction consumes calcium hydroxide from binder to produce Hydrated Calcium Silicates (C-S-H) and in turn, this leads to a decrease in the pH-value of the pore solution which is the main factor responsible for hemp particle degradation.

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Section: The Influence Of Hemp Particles On the Compressive Strengthsupporting

confidence: 88%

Performance Improved of a Lime and Hemp-Based Concrete through the Addition of Metakaolin

Daher¹,

Benazzouk²,

Hamed³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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“…12,22 Furthermore, since the SE reflects the load transfer capacity between the fibre and the matrix, the significant increase in SE values from 70.16 to 507.00 J/m 2 after the inclusion of 5% CP is a consequence of the bonding mechanism where the fibres progressively pull out from the matrix. 59 This improvement in SE is consistent with the decrease in MOE (Table 2 and Figure 8(a)), indicating that there has been a transition from a pure brittle unreinforced matrix to a composite with improved ductility. This gives an indication of the combination of stress and strain in the composite, which may be more important in practical terms (as a measure of robustness) than bending strength.…”

Section: Effect Of Cp Inclusion On the Flexural Mechanical Properties...supporting

confidence: 76%

Dimensional stability, durability and performance of hybrid recycled cellulose fibres reinforcing earth-based materials

Stanislas

Mahamat

Bilba

et al. 2023

Journal of Composite Materials

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Brittle fracture initially occurs at the nanometric and/or interatomic scale without prior plastic deformation under elastic loading. Fibres of different dimensional scales in hybrid composites provide dense packaging and act as reinforcements in the corresponding scales and dimensions. This study evaluated the effect of the inclusion of cellulose pulp (CP) (5wt%, 4.5wt%, 4wt% and 3.5wt%) combined with cellulose nanofibrils (CNF) (0.5wt%, 1wt% and 1.5wt%) from recycled cardboard on the water absorption, density, dimensional stability, thermal insulation, flexural strength and durability of earth-based materials. The total cellulose content (CP and CNF) is set at 5wt%. The results show that the partial replacement of CP by CNF contributes to an increase in the moisture content of the composite from 18% to 21%, while there is a reduction in their dry shrinkage from 2.29% to 1.29% and in their thermal conductivity from 0.42 to 0.39 W/m.K. This is attributed to the different dimensional scales of the fibres in hybrid composites, which provide a dense assembly with greater dimensional stability. The 3.5% CP content combined with 1.5% CNF showed the highest flexural strength (2.76 MPa) and modulus of elasticity (1.93 GPa) of the hybrid materials under four-point bending loading, due to the high anchorage between the cellulose fibres and the matrix. CP and CNF as reinforcing agents in an earth-based matrix is a suitable solution for improving the flexural strength, density, dimensional stability and durability of building bricks. However, bricks reinforced only with CP are recommended where flexural strength and toughness are essential requirements.

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“…This range of flexural strength surpasses that reported in most composite literature references [11,[23][24][25][26]. The parameters shown in Table 2 confirm the suitability of the generated curves in relation to the experimental data.…”

Section: Flexural Strengthsupporting

confidence: 69%

Effect of Hybridization of Carbon Fibers on Mechanical Properties of Cellulose Fiber–Cement Composites: A Response Surface Methodology Study

Insaurriaga,

Gomes,

Ribeiro

et al. 2024

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Fiber-reinforced cement composites, particularly those incorporating natural fibers like cellulose, have gained attention for their potential towards more sustainable construction. However, natural fibers present inherent deficiencies in mechanical properties and can benefit from hybridization with carbon fibers. This study focuses on the incorporation of cellulose and carbon fibers, in varying contents, into fibrocement composites, employing a Response Surface Methodology (RSM) to optimize the material characteristics. The methodology involves testing, encompassing flexural tensile, compression, and fracture toughness tests. The results indicate an increasing trend in flexural strength for higher carbon fiber content, peaking near 5%. A plateau in flexural strength is observed between 1.2% and 3.6% carbon fiber content, suggesting a range where mechanical properties stabilize. Compressive strength shows a plateau between 1.2 and 3.6% and reaches its highest value (≈33 MPa) at a carbon fiber content greater than 4.8%, and fracture toughness above 320 MPa·m1/2 is achieved with carbon fiber content above 3.6%. This study offers insights into optimizing the synergistic effects of cellulose and carbon fibers in fibrocement composites.

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Synergic effect of fiber and matrix treatments for vegetable fiber reinforced cement of improved performance

Cited by 50 publications

References 67 publications

Performance Improved of a Lime and Hemp-Based Concrete through the Addition of Metakaolin

Performance Improved of a Lime and Hemp-Based Concrete through the Addition of Metakaolin

Dimensional stability, durability and performance of hybrid recycled cellulose fibres reinforcing earth-based materials

Effect of Hybridization of Carbon Fibers on Mechanical Properties of Cellulose Fiber–Cement Composites: A Response Surface Methodology Study

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