Optimizing aged asphalt performance: Innovative warm mix agent blends and rheological insights
Daming Wang, Chunjie Miao, Yuqi Song, Youqiu Yi, Jun Long, Zixin Zhang, Tao Lei
Abstract
Embracing the principles of circular economy and zero-waste, this study aligns with the United Nations' twelfth sustainable development goal by investigating warm mix recycled asphalt technology as a sustainable solution for utilizing aged asphalt materials. This approach not only enhances pavement quality but also minimizes resource consumption and environmental impact. We critically examine the limitations of conventional warm mix technologies in improving the high and low-temperature performance of aged asphalt and propose innovative solutions. Our research focuses on the rheological characteristics of warm mix reclaimed asphalt, emphasizing the roles of Sasobit, Evotherm M-1, and YDWB-1 warm-mix additive in rejuvenating aged asphalt. We reveal that Sasobit and Evotherm M-1 enhance the asphalt’s elasticity, thus improving its resistance to permanent deformation, while YDWB-1 displays unique properties that can influence the asphalt's mechanical behavior in different ways. Our findings suggest optimal mixing ratios for these agents and demonstrate their varied impacts on rutting properties at high temperatures and other mechanical characteristics. The study concludes with insights into the optimal combinations of these warm-mix additives to enhance the high and low-temperature qualities of aged asphalt, marking a step forward in sustainable road construction and material science.