Impact of accelerated aging cycles on the performance of extruded cement-based composites reinforced with non-bleached eucalyptus fibers.

Silva, Danillo Wisky; Bufalino, Lina; Junior, Francisco Tarcisio Alves; Scatolino, Mário Vanoli; Batista, Felipe Gomes; de Medeiros, Dayane Targino; Mendes, Lourival Marin; Tonoli, Gustavo Henrique Denzin

Silva, Danillo Wisky; Bufalino, Lina; Junior, Francisco Tarcisio Alves; Scatolino, Mário Vanoli; Batista, Felipe Gomes; de Medeiros, Dayane Targino; Mendes, Lourival Marin; Tonoli, Gustavo Henrique Denzin.

Afiliação

Silva DW; Department of Production Engineering, State University of Amapá - UEAP, Av. Presidente Getúlio Vargas, N. 650, Macapá, AP, Brazil.
Bufalino L; Institute of Agrarian Science - ICA, Rural Federal University of Amazonia, Tancredo Neves Av., 2501, Belém, PA, Zip code 66077-830, Brazil.
Junior FTA; Department of Production Engineering, State University of Amapá - UEAP, Av. Presidente Getúlio Vargas, N. 650, Macapá, AP, Brazil.
Scatolino MV; Agricultural Sciences Center, Rural Federal University of the Semiarid - UFERSA, Mossoró, RN, Zip Code 59625-900, Brazil. marioscatolino@gmail.com.
Batista FG; Department of Forestry Science - DCF, Federal University of Lavras, University Campus, Lavras, MG, Zip Code 37200-000, Brazil.
de Medeiros DT; Department of Forestry Science - DCF, Federal University of Lavras, University Campus, Lavras, MG, Zip Code 37200-000, Brazil.
Mendes LM; Department of Forestry Science - DCF, Federal University of Lavras, University Campus, Lavras, MG, Zip Code 37200-000, Brazil.
Tonoli GHD; Department of Forestry Science - DCF, Federal University of Lavras, University Campus, Lavras, MG, Zip Code 37200-000, Brazil.

Environ Sci Pollut Res Int ; 31(24): 35789-35799, 2024 May.

Article em En | MEDLINE | ID: mdl-38744761

ABSTRACT

ABSTRACT

Thermo-mechanical pulping produces well-individualized fibers compared to wood particles and less fragile fibers compared to Kraft pulping, besides presenting higher volume, higher yield, and lower production cost, which can be an exciting alternative for the fiber-cement industries. This study evaluated the impact of soak and dry-aging cycles on the performance of extruded composites reinforced with non-bleached eucalyptus fibers. The cement matrix comprised cement (70%) and limestone (30%). Composites were reinforced with 1 to 5% of eucalyptus fiber by cement mass and tested on the 28th day of cure at 99% relative humidity and after 400 accelerated aging cycles. The water absorption and apparent porosity gradually increased with the reinforcement level. Composites with 4 and 5% fibers showed the highest toughness (0.21 and 0.23 kJ/m2, respectively). The aging by 400 soak-dry cycles reduced the composites' water absorption and apparent porosity. The modulus of elasticity (MOE), rupture (MOR), and toughness increased, except for toughness for composites reinforced with 1 and 5% fibers, explained by the cementitious matrix's continuous hydration, fiber mineralization, and natural carbonation. In general, eucalyptus thermo-mechanical fibers were suitable for producing cementitious composites. Cementitious composites with 3% fibers presented a higher MOR, MOE, low water absorption, and apparent porosity after 400 accelerated aging cycles. In addition, the composites with 4% fibers also presented remarkable improvements in these properties. The aging cycles did not result in composites with less resistance, a positive fact for their application as tiles and materials for external use in civil construction.

Assuntos

Materiais de Construção; Eucalyptus; Eucalyptus/química; Porosidade; Teste de Materiais

Palavras-chave

Cement composites; Extrusion process; Thermo-mechanical process; Vegetal fibers

Texto completo

Adicionar na Minha BVS

Imprimir

XML

PubMed Links

Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Materiais de Construção / Eucalyptus Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha

Texto completo

Adicionar na Minha BVS

Imprimir

XML

PubMed Links

Buscar no Google