Preliminary evaluation of laminated veneer lumber bonded with expanded polystyrene

Menezzi, Cláudio Henrique Soares Del; Nakamura, Akiko; Queiroz, Francis Lívio Corrêa; Couto, Marcelo Guerino Pereira

doi:10.1007/s00107-016-1023-4

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Therefore, the bending strength of both configurations were statistically similar despite of nearly six-fold difference in MOR of the wood along the grain (89,44 MPa) and across the grain (15 MPa). Del Menezzi et al (2016) studied the mechanical properties of LVL bonded with expanded polystyrene (EPS) and reported that increase in amount of EPS had a negative effect on the MOR and MOE of the composites, also the increased amount of wood content resulted in improved flexural performance of EPS bonded LVL. Also, the amount of compression achieved during the fabrication of the veneer composites plays a crucial role in modelling the mechanical properties (Kurt and Cil 2012).…”

Section: Mechanical Testmentioning

confidence: 99%

Wood polymer composite bonded veneer based hybrid composites

Arya,

Chauhan,

Kumar

et al. 2023

Maderas, Cienc. tecnol.

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Wood veneer based composites have a great demand in present market as the material can utilize small diameter plantation timbers grown at short rotation cycle. This paper presents preparation and characterization of hybrid composites made of wood veneer and wood polymer composite. The study explored utilization of wood polymer composite as an adhesive for bonding veneers replacing formaldehyde-based adhesives. Wood polymer composite containing 40 % bamboo particles embedded in the matrix of polypropylene was used in sheet form to bind the veneers of Melia dubia (Malabar neem) wood. The composites were prepared in both laminated veneer lumber and plywood configurations. The assessment of physical and mechanical properties indicated that the properties of wood polymer composite contribute significantly to the properties of the hybrid composites. The density of the resultant composites was significantly higher (690 kg/m 3 -750 kg/m 3 ) than conventional plywood or laminated veneer lumber. Among mechanical properties, there was no statistical difference in tensile and flexural strength of plywood and laminated veneer lumber configuration. Modulus of elasticity and compressive strength of laminated veneer lumber configuration were significantly higher than plywood. Glue shear strength and internal bond strength of the composites indicated acceptable bonding properties of wood polymer composite which suggests the potential application of these composites as a binding agent for wood veneers. These composites could be a special class of laminated composites with no formaldehyde emission hazards.

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Section: Mechanical Testmentioning

confidence: 99%

Wood polymer composite bonded veneer based hybrid composites

Arya,

Chauhan,

Kumar

et al. 2023

Maderas, Cienc. tecnol.

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“…In another research study, polystyrene was used as the adhesive in manufacturing laminated veneer lumber that had suitable mechanical properties comparable to those of lumber made using thermosetting resins. However, increasing the amount of polystyrene reduced both the density and the mechanical properties of the finished product [15].…”

Section: Introductionmentioning

confidence: 99%

Color Change and Physical-Mechanical Properties of Polystyrene-Impregnated Glulam from Three Tropical Fast-Growing Wood Species

Hadi

Hermawan

Sulastiningsih

et al. 2021

Forests

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The aims of this work were to determine the color change and physical–mechanical properties of polystyrene glulam from three tropical wood species. Wood laminas were cut from logs harvested from a young plantation forest of manii (Maesopsis eminii), mangium (Acacia mangium), and rubber-wood (Hevea brasiliensis). The laminas were impregnated with monomer styrene that was polymerized using potassium peroxy-disulfate as a catalyst and heat. Three-layer glulam was constructed from the polystyrene laminas, using isocyanate glue and cold press. For comparison purposes, three-layer untreated glulam and solid wood samples were prepared. The results showed that the color change of polystyrene glulam was very small compared with untreated glulam. Polystyrene glulam had the highest density, while the density of untreated glulam did not differ from that of the solid wood. The moisture content of all products was matched to the environment, and fulfilled the Japanese standard. Compared with both types of glulams, solid wood had lower values for modulus of rupture (MOR), modulus of elasticity (MOE), and hardness, but higher shear strength. Meanwhile, polystyrene glulam had lower values for MOR and MOE, equal shear strength and wood failure, and higher hardness than the untreated glulam. All glulams had very little delamination in the hot water test. Only rubber-wood glulams fulfilled JAS 234-2003 for MOR, MOE, shear strength, and delamination. To obtain adequate physical–mechanical properties of glulams, medium-density wood is recommended for glulam manufacturing.

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Preliminary evaluation of laminated veneer lumber bonded with expanded polystyrene

Cited by 2 publications

References 4 publications

Wood polymer composite bonded veneer based hybrid composites

Wood polymer composite bonded veneer based hybrid composites

Color Change and Physical-Mechanical Properties of Polystyrene-Impregnated Glulam from Three Tropical Fast-Growing Wood Species

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