Effects of binder and aggregate properties on the permanent deformation of asphalt mixtures by means of uniaxial and triaxial tests

• Published in: Construction & building materials 2022-05, Vol.332, p.127346, Article 127346
• Main Authors: de Barros, Larissa Montagner, do Nascimento, Luis Alberto Herrmann, Aragão, Francisco Thiago Sacramento
• Format: Article
• Language: English
• Subjects: AIMS 2; Asphalt mixtures; FlexPAVETM; MSCR; Permanent deformation; Stress sweep rutting
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2022.127346

•Asphalt binders, aggregates and mixtures lab results, and rutting behavior are presented.•Modeling of mix rutting behavior and simulation of pavements behavior are performed.•MSCR, AIMS2, FN tests, SSR tests and FlexPAVETM results are used to compare the performance of mixtures.•Strong correlations between MSCR results and FN and SSR tests.•SSR tests and FlexPAVETM simulations can differentiate the behavior of mixtures with similar MSCR and FN results. This paper evaluates the effects of asphalt binders and aggregate particles on the permanent deformation of asphalt mixtures. For that, Superpave PG, including MSCR, and AIMS 2 tests are performed with binders and aggregates, respectively, and their results are compared to those of uniaxial and triaxial tests of the corresponding asphalt mixtures. The triaxial tests also provide model inputs for pavement structural simulations using the FlexPAVETM program. The results indicate that the characterization of the performance of binders and mixtures based on a single critical parameter, such as Jnr and Flow Number, is not the most optimized strategy to rank materials. Instead, the consideration of key factors such as temperature and loading configuration should be pursued. In addition, the mixture should be preferably evaluated considering a broader analysis of the pavement performance rather than focusing solely on pass-fail testing criteria.