Improvement of permanent deformation and fatigue life of bituminous mixtures by...

• Author(s): Pereira, Paulo A. A. ; Pais, Jorge C. ; Azevedo, M. C. M.
• Date: 2000
• Persistent ID: http://hdl.handle.net/1822/14210
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Bituminous mixture; Permanent deformation; Fatigue life; Conventional bitumen; Polymer modified bitumen
• Document Type: Conference Object
• Language: English

Description

This paper describes the results of a study aiming the evaluation of pavement performance improvement by using a polymer modified bitumen as binder. Two dense graded bituminous mixtures were produced in laboratory. The first one was produced with conventional bitumen and the second one with polymer-modified bitumen. Permanent deformation tests were carried out in a shear servo-hydraulic machine using the repetitive simple shear test at constant height. Fatigue life tests were carried out in an axial servo-hydraulic testing system using a flexural beam. A comparison between these two mixtures was made for tensile strains calculated for a typical flexible pavement structure where these two mixtures were considered.