Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

Furtini, Ana Carolina Corrêa; Santos, Carolina Aparecida dos; Garcia, Hudson Venâncio Silva; Brito, Flávia Maria Silva; Santos, Thalita Paula dos; Mendes, Lourival Marin; Júnior, José Benedito Guimarães

doi:10.25186/.v16i.1854

Cited by 8 publications

(4 citation statements)

References 38 publications

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“…wood are shown in Table 1. The average value obtained in this study for extractives was lower than that reported by Furtini et al (2021) who obtained an average of 7,38 % for ocote pine (Pinus oocarpa Schiede ex Schltdl.) wood.…”

Section: Physical and Chemical Characterization Of The Lignocellulosi...contrasting

confidence: 87%

Utilization of nanotalc modified adhesives in plywood panels

Lourenço,

Aparecida dos Santos,

Corrêa Furtini

et al. 2024

Maderas-Cienc Tecnol

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As an alternative for the partial replacement of synthetic adhesives are the modifications that occur still during their synthesis, to improve and adhere new properties. Among the possible materials used in nanoscale, talc is a mineral material of natural origin and a promising raw material due to its low cost, lightness, natural hydrophobicity. Due to the scarcity of studies with the insertion of nanotalc in adhesives, this study aimed to produce plywood panels bonded with phenol-formaldehyde adhesive nanomodified with talc to evaluate its physical-mechanical resistance when compared to conventional synthetic adhesives. To carry out this study, three Pinus oocarpa trees with 28 years of age were used. Different concentrations of talc were used in the formulation with the phenol-formaldehyde adhesive, being the treatments 0; 0,05; 1; 1,5 and 2 % of talc (mass/mass) in relation to the adhesive, with three panels per treatment, totaling 15 panels. The pressing time was 8 minutes with temperature of 160 ºC and pressure of 1 MPa. The physical-chemical characteristics of the lignocellulosic material and of the plywood panels were determined. The quality of the adhesive produced was demonstrated by its resistance to water absorption with the insertion of up to 2 % talc to the adhesive, reducing it considerably. From 1 % talc inserted, the plywood panels had their mechanical characteristics superior to those glued with pure phenol-formaldehyde adhesive. However, as the study is innovative in nature, further research should focus on the application and quality evaluation of other talc nanomodified adhesives on different types of wood panels.

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Section: Physical and Chemical Characterization Of The Lignocellulosi...contrasting

confidence: 87%

Utilization of nanotalc modified adhesives in plywood panels

Lourenço,

Aparecida dos Santos,

Corrêa Furtini

et al. 2024

Maderas-Cienc Tecnol

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“…They can also delay the adhesive evaporation rate, increasing the pressing time (IWAKIRI; TRIANOSKI, 2020). *averages followed by the same letter, in the column, do not differ from each other by the Scott-Knott test, at a significance level of 5%.For insoluble lignin, the values obtained in this study are in agreement with the literature Furtini et al (2021),. for example, obtained an average content of 29.20% for pine wood.…”

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confidence: 90%

Using miriti petiole to produce particleboards

Furtini¹,

Santos²,

Miranda³

et al. 2023

Ambient. constr.

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his study aimed to use the petiole residues of miriti to partially replace pine wood and evaluate the effects of this incorporation on the physical and mechanical properties of the particleboards. Panels were produced with 0, 25, 50, and 75% of miriti in partial replacement of wood and 12% of urea-formaldehyde adhesive. The chemical-physical properties of miriti residues showed potential particleboard production as they were similar to those of pinewood. For the physical properties, the panels were classified as low density.There was an increase in the compression ratio and, consequently, in the hygroscopicity . For the mechanical properties, it was observed that the modulus of elasticity (MOE) and modulus of rupture (MOR) did not show any statistical differences. For perpendicular traction (PT), there was a significant reduction in 50%. Considering a general analysis of the physical and mechanical properties, up to 40% of mirti can be substituted, as in this situation they meet the properties mentioned in CS-236-66, except for PT for commercialization of the panels.

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“…Nevertheless, they showed higher thermal resistance than CFPF and REPF samples due to their greater thickness. Although thermal resistance of cross-laminated timber made with coconut wood panels (CTCP) showed a low value (lower than 0.5 m 2 •K•W -1 , compared to BCFB), they had a higher RSI value than the maximum value of laminated timber made with Pinus Oocarpa Schiede ex Schlectendahl and Coffea Arabica L. waste (0.115 m 2 •K•W -1 at 30 mm thickness (Furtini et al 2021)). Therefore, the CTCP may be used as insulation materials for building applications.…”

Section: Results and Discussion Thermal Resistancementioning

confidence: 99%

Experimental Study of Thermal Resistance Values of Natural Fiber Insulating Materials under Different Mean Temperatures

Pásztory

2023

SEEFOR

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The purpose of this paper is to experimentally study the thermal resistance (RSI value) of building insulation materials made mainly from natural fiber. Natural fibrous materials or renewable resources and their reinforcement composites are currently being used in building and construction as a potential solution to significantly reduce thermal load and energy consumption. The RSI value is used in describing the thermal efficiency of insulating material and in an analysis of heat transfer through the structural components of a building (such as walls, roofs, and windows) under steady-state conditions. In this study, the thermal resistance values of several samples made from coir fiber, rice straw fiber, energy reed fiber, and coconut wood were calculated from the thermal conductivity which was measured at mean temperature of 20°C, using the heat flow apparatus. The lowest RSI value was recorded in the phenol-formaldehyde polymer composites reinforced by rice straw fiber (0.115 m2·K·W-1) and coir fiber (0.128 m2·K·W-1) due to the relative thinness of the tested samples (8 and 12 mm). However, these samples can be used as an additional layer in multi-layered assemblies because of their low thermal conductivity value. The highest RSI value was reported on the binderless coir fiber panel (0.909 m2·K·W-1) at the thickness of 50 mm. Another investigation examined the relationship between RSI value and mean temperature to observe the influence of variations of ambient temperature on the heat resistivity of building insulation materials. Practical data showed the decreased linear proportion between thermal resistance and specific mean temperatures increased from 0 to 40°C. It is apparent that an increase in the interior and exterior temperature of a building significantly influences the thermal resistance of its insulation materials. Based on the experimental study, once the thermal conductivity coefficient of each sample was determined, the calculated RSI value was a valuable parameter to evaluate the thermal resistant effectiveness of a multi-layered installation, which allows us to investigate practically the effect of the thickness of additional layers from different insulating materials used in building envelopes.

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Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

Cited by 8 publications

References 38 publications

Utilization of nanotalc modified adhesives in plywood panels

Utilization of nanotalc modified adhesives in plywood panels

Using miriti petiole to produce particleboards

Experimental Study of Thermal Resistance Values of Natural Fiber Insulating Materials under Different Mean Temperatures

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