Aging characterization of asphalt binders through multi-aspect analyses: A critical review

Abstract

Asphalt binders, an indispensable component in road infrastructure construction and maintenance, have been utilized for centuries in the roads. While binders have demonstrated durability and resilience to growing climatic and traffic stressors, concerns persist regarding their susceptibility to aging, a factor that can significantly affect the performance and longevity of asphalt pavements. To address these concerns, extensive research is ongoing to continuously improve our understanding of aging on asphalt binders, employing a multi-aspect characterization approach. In this review paper, we aim to offer a comprehensive and insightful summary of the diverse perspectives provided by researchers on the intricate effects of aging on asphalt binders. We study the chemical, morphological, and rheological aspects of asphalt binder aging, shedding light on the multifaceted changes that occur as these materials mature over time. This cutting-edge approach provides a deeper understanding of the complex processes that underlie asphalt binder aging, keeping the industry up-to-date with the latest findings and breakthroughs. The overarching goal of this review paper is to inspire and motivate asphalt binder researchers to adopt a more holistic approach to characterization, one that considers multiple aspects of the aging phenomenon. By doing so, we can better understand how asphalt binders evolve and degrade over time, ultimately leading to more effective and long-lasting pavements. Furthermore, this review paper highlights the limitations of current methods and technologies, emphasizing the necessity for advancements in the field of asphalt binder aging characterization.