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《Proceedings of the 9th National Conference on Rheology》2008年
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Laboratory research on rheological behavior and characterization of ultraviolet aged asphalt

吴少鹏  朱国军  陈筝  刘至飞  
【摘要】:正The influence of aging on the evolution of structural,morphological and rheological properties of neat asphalt was investigated by Fourier transform infrared (FTIR),atomic force microscopy (AFM) and dynamic shear rheometer (DSR), respectively.Asphalt was suffered under 20 W/m~2 of UV radiant intensity and under the condition of aging time (0,48,96 and 144 h) with film thickness of 100μm and film thickness of 50,100,200 and 500μm after aging for 120 h,respectively,at certain UV radiant intensity 20 W/m~2.Rheological results tested by DSR exhibit higher the complex shear (stiffness) modulus (G~*) and lower phase angle (δ),compared to the virgin at the same test condition.The compositions analysis of asphalt before and after aging show an increase of carbonyl and sulfoxides,while a decrease of aromatic functional groups.With the increase of the component of asphaltene,obvious agglomerates of asphalten appear in neat asphalt surfaces after aging.

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