Adhesion of Aged SBS Modified Asphalt Binder Containing Warm Mix Additive Based on Surface Free Energy
LI Hailian1,2, LI Bo1,3, WANG Qicai1,2, LI Liangying1,2, WANG Yongning1,2
1 Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070; 2 National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control,Lanzhou Jiaotong University, Lanzhou 730070; 3 Key Laboratory of Highway Network Monitoring in Gansu Province, Gansu Hengda Road and Bridge Group Co Ltd, Lanzhou 730070
Abstract: Warm asphalt binders were prepared by adding Sasobit and Evotherm into SBS modified asphalt. The three SBS modified asphalt binders were aged using rotating thin film oven (RTFOT) and pressure aging vessel (PAV). The contact angles between aged SBS modified asphalt containing warm mix additive and distilled water, glycerol and formamide were detected by the sessile drop method. And the effect of short-term aging and long-term aging on contact angle of warm mix SBS modified asphalt containing warm mix additive with water was discussed. The total surface free energy and dispersive component and the polar component of SBS modified asphalt containing warm mix additive based on surface free energy theory. The influence of aging process on surface free energy of SBS modified asphalt containing warm mix additive was investigated. The results show that the contact angle between SBS modified asphalt containing warm mix additive and water is increasing and their hydrophobicity change significantly as they are aged continuously. The total surface free energy and its components will decrease with aging strengthening and decrease obviously at RTFOT aging stage. The polar component of SBS modified asphalt containing Sasobit warm mix additive has increasing trend at long term aging process.
李海莲, 李波, 王起才, 李良英, 王永宁. 基于表面能理论的老化温拌SBS改性沥青结合料的粘附性*[J]. 《材料导报》期刊社, 2017, 31(16): 129-133.
LI Hailian, LI Bo, WANG Qicai, LI Liangying, WANG Yongning. Adhesion of Aged SBS Modified Asphalt Binder Containing Warm Mix Additive Based on Surface Free Energy. Materials Reports, 2017, 31(16): 129-133.
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2017, Vol. 31 
