Reinforcement of maritime pine cross-laminated timber panels by means of natural flax fibers

Valdés, Mónica; Giaccu, Gian Felice; Meloni, Daniel; Concu, Giovanna

doi:10.1016/j.conbuildmat.2019.117741

Cited by 25 publications

(15 citation statements)

References 40 publications

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“…Lignocellulosic fiber fabrics like flax or cellulose can be applied as reinforcement to overcome these drawbacks. Several promising studies about flax fiber reinforcement for laminar wood structures have been carried out during the last decade [ 21 , 22 , 23 , 24 , 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Cellulose and Flax Fiber Unidirectional Reinforced Plywood

et al. 2022

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This research presents the influence of two different cellulose (hydrophobic pretreated/non-pretreated) and one flax-fiber unidirectional nonwoven low areal weight fiber reinforcements on the mechanical properties of urea-formaldehyde bonded five layered beech (Fagus sylvatica L.) plywood as an alternative to commonly used synthetic fiber reinforcements. The results display divergent trends regarding the improvement of the mechanical properties—modulus of elasticity, modulus of rupture, tensile strength, shear strength, and screw withdrawal resistance. The non-treated cellulose and flax reinforcing nonwoven fabrics revealed similar mechanical behaviors. The hydrophobic pretreatment of cellulose nonwovens improved the performance of plywood regarding tensile strength (10–11%), shear strength (7–16%), screw withdrawal resistance (11–15%), and modulus of rupture (0–2%), but lowered modulus of elasticity (2–3%) compared to the reference.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Cellulose and Flax Fiber Unidirectional Reinforced Plywood

et al. 2022

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“…Improved load capacity and stiffness of flax-fiber reinforced molded plywood structures could be measured [15]. Valdes et al (2020) reinforced CLT with flax fiber fabrics bonded with bicomponent thixotropic epoxy resin [16]. The study showed that reinforcement of three-layered solid wood panels (SWP) significantly improved load-carrying capacity and stiffness, while the effect for five-layered panels was negligible.…”

Section: Introductionmentioning

confidence: 99%

Influence of Adhesive Systems on the Mechanical and Physical Properties of Flax Fiber Reinforced Beech Plywood

et al. 2021

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In order to improve the acceptance of broader industrial application of flax fiber reinforced beech (Fagus sylvatica L.) plywood, five different industrial applicated adhesive systems were tested. Epoxy resin, urea-formaldehyde, melamine-urea formaldehyde, isocyanate MDI prepolymer, and polyurethane displayed a divergent picture in improving the mechanical properties—modulus of elasticity, modulus of rupture, tensile strength, shear strength and screw withdrawal resistance—of flax fiber-reinforced plywood. Epoxy resin is well suited for flax fiber reinforcement, whereas urea-formaldehyde, melamine urea-formaldehyde, and isocyanate prepolymer improved modulus of elasticity, modulus of rupture, shear strength, and screw withdrawal resistance, but lowered tensile strength. Polyurethane lowered the mechanical properties of flax fiber reinforced plywood. Flax fiber reinforced epoxy resin bonded plywood exceeded glass fiber reinforced plywood in terms of shear strength, modulus of elasticity, and modulus of rupture.

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“…The most common polymer composites used in wooden structures include materials based on carbon fibers (carbon fiber-reinforced polymers—CFRP), basalt fibers (basalt fiber-reinforced polymers—BFRP), glass fiber (glass fiber-reinforced polymers—GFRP) and aramid fiber (aramid fiber-reinforced polymers—AFRP). Next to polymer materials reinforcements include also plant origin fibers [ 9 ], e.g., jute [ 10 ], linen [ 11 ], or bamboo [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Strength Properties of Structural Glulam Elements from Pine (Pinus sylvestris L.) Timber Reinforced in the Tensile Zone with Steel and Basalt Rods

et al. 2021

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The study analyzed potential applicability for asymmetric reinforcement of glulam beams using materials with a higher modulus of elasticity. Reinforcement elements included smooth and ribbed steel rods as well as basalt rods. These rods were placed only in the tensile zone, assuming that they will not only impart increased rigidity but first of all will reduce the scatter of bending strength values. What is significant, tests were conducted on timber with defects, as it is most commonly used in industrial practice. Analyses showed that this provides an increase in rigidity close to the assumed level. A significant increase in strength was observed. The manufactured beams reinforced with steel and basalt rods were characterized by mean bending strength amounting to 54 and 47 N/mm2, respectively. However, no significant improvement was found in the scatter of the observed variable. Beams reinforced with steel exhibit a 20% higher strength than unreinforced beams. The lower strength of beams reinforced with basalt bars may be related to the lower modulus of elasticity of the basalt itself.

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Reinforcement of maritime pine cross-laminated timber panels by means of natural flax fibers

Cited by 25 publications

References 40 publications

Mechanical Properties of Cellulose and Flax Fiber Unidirectional Reinforced Plywood

Mechanical Properties of Cellulose and Flax Fiber Unidirectional Reinforced Plywood

Influence of Adhesive Systems on the Mechanical and Physical Properties of Flax Fiber Reinforced Beech Plywood

Strength Properties of Structural Glulam Elements from Pine (Pinus sylvestris L.) Timber Reinforced in the Tensile Zone with Steel and Basalt Rods

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