Propriedades físico-mecânicas de painéis aglomerados madeira-bambu

Melo, Rafael Rodolfo de; Stangerlin, Diego Martins; Sousa, Adilson Pacheco de; Cademartori, Pedro Henrique González de; Schneid, Eduardo

doi:10.1590/0103-8478cr20120970

Cited by 22 publications

(22 citation statements)

References 7 publications

(9 reference statements)

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“…The average values of the particleboards were lower than what is established (650 kg.m -3 ). This trend was also observed by Valarelli et al (2013) and Bazzetto et al (2019), as well as by Melo et al (2015), who observed a loss of adhesive and paraffin during panel manufacturing due to adhesion on the edges of the sizing machine and differences in the specific mass and moisture content of the particles used to make the panels. The particleboards showed average density (Table 3) of 550 to 750 kg.m -3 , which is in agreement with NBR 14810 (ABNT, 2006).…”

Section: Physical Properties Of the Particleboardssupporting

confidence: 77%

“…Research has already been conducted with the objective of producing experimental panels with bamboo associated or not with other lignocellulosic materials or varying some production parameter (Valarelli et al, 2013;Valarelli et al, 2014;Zaia et al, 2015, Dinhane et al, 2015Melo et al, 2015;Morais et al, 2015;Almeida et al, 2017;Abdulkareem & Adeniyi, 2017). The species Dendrocalamus asper (Schult f.) Backer ex Heyne was used for the present experiment due to its good resistance properties.…”

Section: Introductionmentioning

confidence: 99%

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Properties of particleboards manufactured from bamboo (Dendrocalamus asper)

Brito

Júnior

2020

Agraria

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Bamboo is a source of industrial raw material with wide geographical distribution. Brazil has good soil and climate conditions for its cultivation, in addition to existing reserves. Advantages of bamboo include: versatility, fast growth and good strength properties. One way of using this material would be as a raw material for manufacturing particleboards. Within this context, this article addresses an evaluation of the physical and mechanical properties of particleboards manufactured from bamboo particles (Dendrocalamus asper (Schult f.). Backer ex Heyne. Particles with 0.50 and 0.85mm granulometry and two conditions (control and treatment by immersion in hot water (70 ± 5 °C) for two hours) were used. Twelve homogeneous particleboards bonded with urea-formaldehyde adhesive with 10% solids were manufactured and the predetermined nominal density for all panels was 650 kg m-3. The properties analyzed were: water absorption, swelling and non-return rate in thickness, density profile, rupture modulus, elastic modulus, screw withdrawal and internal adhesion. Panels consisting of 0.50 mm granulometry showed higher water absorption rates, while panels made of particles treated with hot water and 0.85 mm granulometry showed higher swelling rates and non-return thickness. The panels made of treated particles showed higher density profile values in both layers of the panels. The granulometry did not influence the mechanical properties of the panels, and those with treated particles exhibited significant performance for the surface and top screw withdrawal properties, and internal adhesion. This last mentioned property reached the minimum value required by the standard. The results showed that it is feasible to use bamboo to manufacture particleboards, but it is necessary to adjust some variables such as nominal density, pressing parameters, adhesive content or the inclusion of a less dense material in the composition of the panels.

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Section: Physical Properties Of the Particleboardssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Properties of particleboards manufactured from bamboo (Dendrocalamus asper)

Brito

Júnior

2020

Agraria

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“…This fact is not uncommon and may be associated with loss of adhesive and paraffin during application and material loss during the manual formation of the particle mattress, as well as during the pre-pressing and hot pressing steps. Melo et al (2015) also reported this fact and attributed factors such as loss of adhesive and paraffin at the application time due to adhesion on the edges of the drum and differences in the specific mass and moisture content of particles.…”

Section: Moisture Content Density and Compaction Ratiomentioning

confidence: 84%

Effect of Particle Size on Bamboo Particle Board Properties

2019

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In this work, bamboo chips (Dendrocalamus asper) were crushed according to four particle size classes (A = -35+40 mesh; B = -40+48 mesh; C = -48+60 mesh; D = -60+65 mesh) to produce particleboards with four different compositions (100%A; 75%A + 25% B; 50%A + 50%B; 25%A + 25%B + 25%C + 25%D). Each composition was considered a treatment. The aim was to verify the effect on the physical and mechanical properties of panels. The test methods and requirements to evaluate the properties were based on NBR 14810 Brazilian standard. The results showed that the particle size used in compositions showen no significant effect on moisture content, density, thickness swelling (24 hours), internal bonding or resistance to screw withdrawal (face and side) of panels. Significant effects were verified on water absorption (2 and 24 hours), thickness swelling (2 hours), MOR and MOE to static bending.

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“…Bamboo is among such resources; it includes 34 genera and 232 species, of which 174 are endemic in Brazil, and evidences its diversity, although little explored (Arruda et al, 2011). Some species are employed as building elements due to their strength, fl exibility and versatility (Flander and Rovers, 2009), and raw material for the manufacture of particleboards (Almeida et al, 2017;Dinhane et al, 2015;Melo et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Thermal Modification of Sugarcane Waste and Bamboo Particles for the Manufacture of Particleboards

Brito

Bortoletto

2019

Rev. Árvore

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The thermal modification of particles of the paticleboards constituted of agroforest and industrial waste can improves the dimensional stability (thickness variation) and reduces the use of chemicals that can raise the costs of the process or be hazardous to humans and the environment. This study evaluated the effect of the thermal modification on the physical-mechanical properties and density profile of particleboards manufactured from sugarcane bagasse and bamboo (Dendrocalamus asper) (Schult f.) Backer ex Heyne). A mixture of 75% bamboo particles and 25% sugarcane bagasse was subjected to 220 °C temperature for 201 min. Urea-formaldehyde (UF)-based adhesive with three solids contents (10, 12 and 14%) based on the dry mass of the particles was used for the aggregation of the materials. Both temperature and increases in the adhesive content improved their dimensional stability, however, the thermal treatment reduced the mechanical properties. The particleboards composed of treated particles did not meet the minimum specifications established by the Brazilian norm utilized. The densitometric profiles were negatively influenced by the thermal modification and improved by the increase in adhesive content.

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Propriedades físico-mecânicas de painéis aglomerados madeira-bambu

Cited by 22 publications

References 7 publications

Properties of particleboards manufactured from bamboo (Dendrocalamus asper)

Properties of particleboards manufactured from bamboo (Dendrocalamus asper)

Effect of Particle Size on Bamboo Particle Board Properties

Thermal Modification of Sugarcane Waste and Bamboo Particles for the Manufacture of Particleboards

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