Journal of Guangdong University of Technology ›› 2022, Vol. 39 ›› Issue (06): 80-89.doi: 10.12052/gdutxb.210164

• Comprehensive Studies • Previous Articles     Next Articles

Thermal Aging Behavior Characteristics of Light Stabilized Modified Asphalt Materials

Huang Zhen-ying1, Sun Xiao-long2, Zhu Yun-chu2, Cang Zhi3, Yuan Jun-shen2, Lyu Jian-bing2   

  1. 1. Guangzhou HuaHui Traffic Technology Co., Ltd., Guangzhou 510335, China;
    2. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;
    3. Shanxi Transportation Holding Group, Datong North Expressway Branch, Datong 037000, China
  • Received:2021-11-01 Online:2022-11-10 Published:2022-11-25

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Abstract: In order to clarify the effect of high temperature aging on light-stable modified asphalt materials, hindered amine light stabilizer was selected to prepare modified asphalt. The light-stablized modified asphalt is subjected to thermal aging treatment under different temperature and time conditions. The influence of thermal aging on the road performance of light-stabilized modified asphalt binder was studied by means of three index tests and Brookfield viscosity test. Atomic Force Microscope (Atomic Force Microscope, AFM) was used to characterize the surface roughness changes of light-stablized modified asphalt under different thermal aging conditions. The influence of thermal aging on the microscopic morphology of asphalt was analyzed by 3D morphology reconstruction and the influence of thermal aging on light-stable modified asphalt was clarified. The results showed that T770 modifier can alleviate the effect of thermal aging on asphalt binder. When the heat aging time exceeded 6 hours, honeycomb structures appeared in the base asphalt. As the aging time increased, the special structure formed on the surface of the base asphalt became smaller gradually. At 6h and 9h, honeycomb structure appeared in the T770 modified asphalt. According to the comparison of roughness data, the surface undulation of modified asphalt was greater than that of base asphalt, which indicated that under the action of heat aging the surface roughness of T770 modified asphalt was slightly higher than that of the base asphalt binder, demonstrating that the light-stable modified asphalt material had the higher sensitivity to heat aging.

Key words: asphalt, light stabilizer, aging, characteristics, characterization

CLC Number: 

  • U414
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