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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Treatments of residual pine strands: characterization and wood-cement-compatibility

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Autor(es):
Cabral, Matheus R. [1, 2] ; Nakanishi, Erika Y. [1] ; Franco, Mayara S. R. [1] ; Santos, Sergio F. [3] ; Fiorelli, Juliano [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Fac Anim Sci & Food Engn, Dept Biosyst Engn, Pirassununga - Brazil
[2] Laval Univ, Forest & Wood Sci Dept, NSERC Ind Res Chair Ecoresponsible Wood Construct, Quebec City, PQ - Canada
[3] Sao Paulo State Univ UNESP, Sch Engn, Dept Mat & Technol, Guaratingueta - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY; v. 40, n. 6, p. 396-407, OCT 7 2020.
Citações Web of Science: 0
Resumo

This paper aims to evaluate treatments on pine strands as well as wood-cement compatibility. The strands were prepared and then were submitted to four treatments (untreated; cold water, hot water and NaOH). Physical, chemical, thermal and mechanical properties of the strands were measured. Wood-cement composites were produced with all strand treatments. To evaluate the strand effects on the cement hydration, axial compression tests were conducted at 28-day. The phases of the matrix of the composites at 24 h 7- and 28-day were also determinate. Fourier transform infrared spectra shows that, although the treatments partially removed the hemicellulose and extractives, they also reduced the cellulose and lignin bands. Axial compression results indicated that there were no differences between values for the composites with untreated and treated strands. For the phase analyses, in the initial ages (24 h and 7-day), it was identified that portlandite for cement sample (control) is higher than those containing the strands. At 28-day, it was found that among the strands, the untreated have the lower portlandite content and the higher calcium carbonate content. Indicating the cement carbonation over time as presented in the cement sample (control). Therefore, the untreated pine residual strand showed good compatibility with cement and for this study there were no benefits on treating the strands. (AU)

Processo FAPESP: 16/07372-9 - Painéis à base de biomateriais com gradação funcional para uso como abrigo para leitões
Beneficiário:Erika Yukari Nakanishi
Modalidade de apoio: Bolsas no Brasil - Doutorado
Processo FAPESP: 17/18076-4 - Painel OSB plano e trapezoidal/ondulado de biomassa florestal residual: análise numérica e experimental
Beneficiário:Juliano Fiorelli
Modalidade de apoio: Auxílio à Pesquisa - Regular