Correlação entre envelhecimento natural e artificial em painéis de partículas

Autor: Marcio Rogério da Silva, Tiago Hendrigo de Almeida, João Paulo Boff Almeida, Maria Fátima do Nascimento, Diego Henrique de Almeida, Vinicius Borges de Moura Aquino, André Luis Christoforo, Francisco Antonio Rocco Lahr
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Ambiente Construído, Volume: 22, Issue: 2, Pages: 233-245, Published: 16 MAR 2022
Ambiente Construído; Vol. 22 No. 2 (2022): Edição Especial Sobre Gestão e Economia da Construção; 233-245
Ambiente Construído; Vol. 22 Núm. 2 (2022): Edição Especial Sobre Gestão e Economia da Construção; 233-245
Ambiente Construído; v. 22 n. 2 (2022): Edição Especial Sobre Gestão e Economia da Construção; 233-245
Ambiente Construído v.22 n.2 2022
Ambiente construído
Associação Nacional de Tecnologia do Ambiente Construído (ANTAC)
instacron:ANTAC
ISSN: 1678-8621
1415-8876
Popis: The main objective of this work was to establish a correlation between natural aging with artificial aging in medium density particleboards produced with polyurethane resin of castor oil and Pinus sp. For such correlation, climatological parameters at São Carlos city, São Paulo state Brazil were used. The established correlation was that 20 cycles would be proportional to the same degradation of two months of exposure under natural aging. The relation between physical and mechanical properties with the effects provided by number of months (M) on the natural aging with number of cycles (Nc) on the artificial aging was obtained with cubical polynomial regression models. In general, for physical properties, 20 Nc represents 7 to 8 months and for mechanical properties, 11 to 12 months, with exception to internal bonding, with 8 months of natural aging. The equations which best represent the relation between Nc and M were thickness swelling at 2h and water absorption at 2 h and 24 h, with R² above 93%.
The main objective of this work was stabilizing correlation between natural aging with artificial aging in medium density particleboards produced with polyurethane resin of castor oil and Pinus sp. It was done using climatological parameters at São Carlos city, Brazil and a calculation methodology. And it was calculated that 20 cycles would be proportional the same degradation of two months of exposition of natural aging. There was reduction in the mechanical properties over time for weathering. The relation between physical and mechanical properties with the effects provide by number of months (M) in the natural aging with number of cycles (Nc) in the artificial aging was obtained with cubical polynomial regression models. In general, for physical properties 20 Nc are around at 7 and 8 months, and for mechanical properties are around at 11 and 12 months, with exception internal bonding with 8 months. The expectative with the calculation was 20 Nc is the same two months of outdoor exposition. The equations that best represent relation between Nc and M were thickness swelling at 2h and water absorption at 2 h and 24 h, with R² larger 93%.
Databáze: OpenAIRE
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