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http://repositorio.ufc.br/handle/riufc/69557| Tipo: | Artigo de Evento |
| Título: | Thermo-rheological behavior of modified bitumens adding virgin and waste polymers |
| Autor(es): | Bringel, Raquel Moraes Alencar, Ana Ellen Valentim de Soares, Jorge Barbosa Soares, Sandra de Aguiar Nascimento, Daniel Rodrigues do Costa, Erivelton Façanha da |
| Palavras-chave: | Rheology;Modified binders;Waste polymers;CNSL additive |
| Data do documento: | 2008 |
| Instituição/Editor/Publicador: | Euroasphalt and Eurobitume Congress |
| Citação: | SOARES, J. B. et al. Thermo-rheological behavior of modified bitumens adding virgin and waste polymers. In: EUROASPHALT AND EUROBITUME CONGRESS, 4., 2008, Copenhagen. Anais... Copenhagen, 2008. p. 1-7. |
| Resumo: | The use of recycled polymers for replacing virgin polymers has been employed in the road building contributing to asphalt performance and lower environmental pollution. In this work the copolymers ethylene vinyl acetate (EVA) and a recycled EVA copolymer from industry (EVAR) were used as modifying agents of the Brazilian bitumen. Other additive as a cashew nut shell liquid (CNSL) was also added in order to evaluate its use as bitumen modifiers. The rheological properties of the modified binders were analyzed by means of dynamic shear rheometer (DSR) and accelerated ageing experiment (RTFOT). Differently to the original the modified binders showed non-Newtonian behavior. The results obtained reveal that EVAR can be considered as an interesting substitute of EVA not only as a mean of effecting improvement but also from an economic and environmental point of view. The use of the original EVA and EVAR waste polymers helped to improve the aging resistance. The rutting factor (G*/sin δ) suggest that the polymers and waste can improve the elasticity of the asphalt. The activation energy of the viscous flux (Ef) for the samples oscillated between 58 and 70 KJ/mo land showed that the additive CNSL can reduce the viscosity and thermal susceptibility of the modified binder. |
| URI: | http://www.repositorio.ufc.br/handle/riufc/69557 |
| Aparece nas coleções: | DET - Trabalhos apresentados em eventos |
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| 2008_eve_jbsoares.pdf | 501,93 kB | Adobe PDF | Visualizar/Abrir |
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