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Effect of Biochar from Oat Hulls on the Physical Properties of Asphalt Binder.
Martínez-Toledo, Camila; Valdés-Vidal, Gonzalo; Calabi-Floody, Alejandra; González, María Eugenia; Reyes-Ortiz, Oscar.
Afiliação
  • Martínez-Toledo C; Department of Civil Engineering, University of La Frontera, Temuco 4811230, Chile.
  • Valdés-Vidal G; Department of Civil Engineering, University of La Frontera, Temuco 4811230, Chile.
  • Calabi-Floody A; Department of Civil Engineering, University of La Frontera, Temuco 4811230, Chile.
  • González ME; Department of Chemical Engineering, University of La Frontera, Temuco 4811230, Chile.
  • Reyes-Ortiz O; Department of Civil Engineering, Military University of Nueva Granada, Bogotá 111711, Colombia.
Materials (Basel) ; 15(19)2022 Oct 09.
Article em En | MEDLINE | ID: mdl-36234340
The purpose of this study was to verify the feasibility of using biochar from oat hulls (BO) as a potential bio-modifier to improve the physical properties of conventional asphalt binder. The BO and asphalt binder were characterized by confocal (fluorescence) laser microscopy, scanning electron microscopy and Fourier transform infrared spectroscopy. Then, an asphalt binder modification procedure was established and modifications with 2.5, 5.0 and 7.5% of BO on the weight of the asphalt binder were evaluated, using a particle size < 75 µm. The physical properties of the evaluated modified asphalt binder with BO were: rotational viscosity in original and aged state, aging index, Fraass breaking point, softening point, penetration, penetration rate and storage stability. The results indicated that the BO has a porous structure, able to interact with the asphalt binder by C=O and C=C bonds. In addition, modification of the asphalt binder with BO increases the rotational viscosity related to high-temperature rutting resistance. The results obtained from the Fraass breaking point and softening point indicated that the use of BO extends the viscoelastic range of the asphalt binder. In addition, the evaluated modifications present low susceptibility to aging and good storage stability.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Materials (Basel) Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Chile País de publicação: Suíça
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Materials (Basel) Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Chile País de publicação: Suíça