Abstract To investigate the effect of bitumen physicochemical and thermodynamic parameters on its cohesive properties, 9 asphalt binders from different refineries were used. Chemical constituents, molecular weight distribution as well as thermodynamic parameters of asphalt were obtained. Peel test was applied to evaluate the cohesive properties within bitumen. The relationship between these parameters was investigated using regression analysis. Large molecule size shows weak negative correlation with cohesion properties of bitumen. Surface free energy especially nonpolar component shows significantly positive correlation with cohesion fracture energy. Surface free energy is applicable to screen asphalt binder in terms of cohesive properties.

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研究物理化学和热力学影响对沥青粘结性能的影响

摘要 为了研究沥青物理化学和热力学参数对其粘结性能的影响，使用了来自不同炼油厂的 9 种沥青结合料。获得了沥青的化学成分、分子量分布以及热力学参数。应用剥离试验来评估沥青内的内聚性能。使用回归分析研究了这些参数之间的关系。大分子尺寸与沥青的内聚特性呈弱负相关。表面自由能特别是非极性组分与内聚断裂能呈显着正相关。表面自由能适用于筛分沥青结合料的内聚性。