Viscous Flow Activation Energy and Short-Term Aging Resistance of SBS-Modified Asphalt Enhanced by PPA Oil-Grinding Activated MoS_(2)  

作　　者：Shun Chen Yingjie Wang Xingyang He Ying Su Yingyuan Pan Yimin Cao Wentian Wang Chao Yang Bo Jiang Shaolin Zhang 

机构地区：[1]School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan,430068,China [2]Building Waterproof Engineering and Technology Research Center of Hubei Province,Hubei University of Technology,Wuhan,430068,China [3]Key Laboratory of Intelligent Health Perception and Ecological Restoration of Rivers and Lakes,Ministry of Education,Hubei University of Technology,Wuhan,430068,China [4]China Construction Third Bureau First Engineering Co.,Ltd.,China

出　　处：《Fluid Dynamics & Materials Processing》2025年第2期387-404,共18页流体力学与材料加工(英文)

基　　金：financially supported by the Key Research and Development Program of Hubei Province(Nos.2022BCA077 and 2022BCA082).

摘　　要：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_(2))and polyphosphoric acid(PPA)were ground in naphthenic oil(NO)and subjected to mechanical activation to create PPAmodified MoS_(2),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 SAOMS 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 shortterm 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.

关 键 词：Composite-modified asphalt GRINDING viscous flow activation energy short-term aging collaborated 

分 类 号：U414[交通运输工程—道路与铁道工程]