Experimental Study on Warm Mix Asphalt Binders with a Focus on Rheological Performance
Additives; Fatigue resistance; High-temperature performance; Low-temperature performance; Rotational viscosity; Warm mix asphalt
Warm mix asphalt (WMA) mixtures have been increasingly used in road construction due to their energy saving and environmental protect benefits. However, unsuitable additives were often adopted due to their variability and it often led to poorer quality of asphalt pavements. In this study, nine asphalt samples from two categories of warm mix additives, including six organic and three chemical additives, were prepared. The rotational viscosity test, temperature sweep test, linear amplitude sweep test (LAS), and bending beam rheometer (BBR) test were employed to comprehensively evaluate the effect of warm mix additives on the viscosity-reduction effect, high-temperature performance, fatigue resistance, and low-temperature performance of WMA, respectively. The results showed that the viscosity- reduction effect of organic additives was more significant compared to chemical additives. Besides, organic additives were generally favorable to the high-temperature and fatigue resistance of asphalt binders, but their effects on the low-temperature performance of asphalt binders were highly variable. Chemical additives had a limited effect on the high-temperature and fatigue resistance of asphalt binders. Meanwhile, the chemical additives have a marginally positive and stable impact on the low-temperature performance of asphalt binders. The findings provided a comprehensive basis for the selection and application of warm mix additives. The Author(s), under exclusive licence to Chinese Society of Pavement Engineering 2025.
Pang, Jiangbo; Chen, Yu; Wang, Lei; Song, Haoran; Yan, Yuangang; Hossiney, Nabil
International Journal of Pavement Research and Technology;
Restricted Access; Hardcopy may be available in the library
https://doi.org/10.1007/s42947-025-00547-y https://www.scopus.com/pages/publications/105004346533?origin=resultslist
Pang J., Baiquan Branch of Shaanxi Transportation Holding Group Co., Ltd., Shaanxi Province, Ankang, 725000, China; Chen Y., School of Highway, Changan University, Middle Section of NanErhuan Road, Shaanxi Province, Xian, 710064, China; Wang L., Shaanxi Transportation Construction and Maintenance Engineering Co., Ltd., Shaanxi Province, Xian, 710075, China; Song H., School of Highway, Changan University, Middle Section of NanErhuan Road, Shaanxi Province, Xian, 710064, China; Yan Y., Shaanxi Transportation Construction and Maintenance Engineering Co., Ltd., Shaanxi Province, Xian, 710075, China; Hossiney N., Department of Civil Engineering, CHRIST (Deemed to be University), Karnataka, Kumbalgodu, Bengaluru, 560074, India