Exploring the effects of volumetrics and binder properties on the performance of asphalt mixtures

• Published in: Construction & building materials 2024-08, Vol.438, p.137054, Article 137054
• Main Authors: Rocha, Marcos Lamha, Enríquez-León, Alexis Jair, Aragão, Francisco Thiago Sacramento, Espíndola, Rogério Pinto, Nascimento, Luis Alberto Herrmann do
• Format: Article
• Language: English
• Subjects: Asphalt mixtures; Balanced Mix Design (BMD); Performance-volumetrics relationship
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2024.137054

Current design methods rely mainly on the volumetric properties of asphalt mixtures. More comprehensive mixture analyses facilitate a broader understanding of the pavement performance as a function of factors such as traffic, climate, and mixture properties. Recently, performance-based mix designs have been developed to overcome shortcomings of the volumetric-based designs. Nevertheless, these new approaches may be time-consuming and expensive, and establishing a comprehensive understanding of the interplay between binder characteristics, volumetric properties, and performance outcomes becomes crucial. This work aims to explore relationships among these three aspects of asphalt mixtures regarding fatigue cracking and rutting performance. A database from different Brazilian studies and tests were collected. Data exploration analysis was conducted to evaluate the effect of the binder and volumetric properties on the fatigue and rutting results. The statistical analyses conducted in this study highlight that most properties within the database significantly impact asphalt mixture performance. Additionally, clear relationships were identified between various performance parameters. Lastly, multivariate analyses pinpointed key volumetric and binder variables that predominantly influence the mixture performance, particularly in relation to fatigue and rutting results. •Aggregate gradation and NMAS correlate with mixture volumetrics.•Moderate correlation exists between stiffness and fatigue parameters.•Binder properties are significantly correlated with mixture stiffness.•A Principal Component Analysis identified the binder primary role on mixture performance.•Volumetric properties play a substantial, but secondary role on mixture performance.