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Performance of wet process method alternatives: terminal or continuous blend

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Detalhes bibliográficos
Resumo:This study presents the results of the research to investigate asphalt rubber mixtures produced with asphalt rubber binder obtained from two different processes; (i) terminal blend (produced in refinery); (ii) continuous blend (produced in laboratory). The experiment included the evaluation of fatigue and permanent deformation resistance of two gap graded mixtures (Caltrans ARHM -GG; ADOT AR-A C) and a dense gradation Asphalt Institute (AI) mix type IV) Two asphalt rubbers from terminal blend process were used with 15% and 20% of crumb rubber content. The asphalt rubber from continuous blend process was obtained with 21% of crumb rubber. Each gradation was used to produce mixtures using asphalt rubber from both processes (continuous and terminal blend). The results showed that asphalt-rubber mixtures with terminal blend process presented best performance for rutting and the mixtures from continuous blend presented better fatigue life.
Autores principais:Fontes, Liseane P. T. L.
Outros Autores:Pereira, Paulo A. A.; Pais, Jorge C.; Trichês, Glicério
Assunto:Asphalt rubber Web process Continuous blend Terminal blend
Ano:2006
País:Portugal
Tipo de documento:comunicação em conferência
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho
Descrição
Resumo:This study presents the results of the research to investigate asphalt rubber mixtures produced with asphalt rubber binder obtained from two different processes; (i) terminal blend (produced in refinery); (ii) continuous blend (produced in laboratory). The experiment included the evaluation of fatigue and permanent deformation resistance of two gap graded mixtures (Caltrans ARHM -GG; ADOT AR-A C) and a dense gradation Asphalt Institute (AI) mix type IV) Two asphalt rubbers from terminal blend process were used with 15% and 20% of crumb rubber content. The asphalt rubber from continuous blend process was obtained with 21% of crumb rubber. Each gradation was used to produce mixtures using asphalt rubber from both processes (continuous and terminal blend). The results showed that asphalt-rubber mixtures with terminal blend process presented best performance for rutting and the mixtures from continuous blend presented better fatigue life.