Performance of wet process method alternatives : terminal or continuous blend

• Author(s): Fontes, Liseane P. T. L. ; Pereira, Paulo A. A. ; Pais, Jorge C. ; Trichês, Glicério
• Date: 2006
• Persistent ID: http://hdl.handle.net/1822/7194
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Asphalt rubber; Web process; Continuous blend; Terminal blend
• Document Type: Conference Object
• Language: English

Description

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.