@Article{fdmp.2024.055697,
AUTHOR = {Shun Chen, Yingjie Wang, Xingyang He, Ying Su, Yingyuan Pan, Yimin Cao, Wentian Wang, Chao Yang, Bo Jiang, Shaolin Zhang},
TITLE = {Viscous Flow Activation Energy and Short-Term Aging Resistance of SBS-Modified Asphalt Enhanced by PPA Oil-Grinding Activated MoS<sub>2</sub>},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {21},
YEAR = {2025},
NUMBER = {2},
PAGES = {387--404},
URL = {http://www.techscience.com/fdmp/v21n2/59800},
ISSN = {1555-2578},
ABSTRACT = {Styrene-butadiene-styrene (SBS) modified asphalt (SA) has long found effective applications in road construction materials. When combined with fillers, SBS-modified asphalt has demonstrated promising resistance to fatigue cracking caused by temperature fluctuations and aging. In this study, molybdenum disulfide (MoS<sub>2</sub>) and polyphosphoric acid (PPA) were ground in naphthenic oil (NO) and subjected to mechanical activation to create PPA-modified MoS<sub>2</sub>, referred to as OMS-PPA. By blending various ratios of OMS-PPA with SBS-modified asphalt, composite-modified asphalts were successfully developed to enhance their overall properties. To assess the mechanical characteristics and stability of these modified asphalts, various methods were employed, including penetration factor, flow activation energy, fluorescence microscopy, and dynamic shear rheology. Additionally, the short-term aging performance was evaluated using Fourier transform infrared (FTIR) spectroscopy and nanoindentation tests. The results revealed a 3.7% decrease in the penetration-temperature coefficient for SA-OMS compared to SA, while 1-SA-OMS-PPA showed an even greater reduction of 7.1%. Furthermore, after short-term aging, carboxyl group generation in SA increased by 5.93%, while SA-OMS exhibited a smaller rise of 1.36%, and 1-SA-OMS-PPA saw an increase of just 0.93%. The study also highlighted significant improvements in the hardness of these materials. The hardness change ratio for SA-OMS decreased by 43.08%, while the ratio for 1-SA-OMS-PPA saw a notable reduction of 65.16% compared to unmodified SA. These findings suggest that OMS-PPA contributed to improvements in temperature sensitivity, particle dispersibility, and resistance to short-term aging in asphalts. The results hold significant promise for the future development of advanced asphalt-based materials with potential high-value applications in flexible pavements for highways.},
DOI = {10.32604/fdmp.2024.055697}
}