Structural Characterization of Micromechanical Properties in Asphalt Using Atomic Force Microscopy

摘要: This paper semiquantitatively evaluates the microrheological properties of asphalt binder using atomic force microscopy. It also presents differences between these amongst various microstructures within an binder, in addition to influence oxidative aging on properties. Nano-indentation experiments performed a microgrid phases determined micromechanical such as stiffness, adhesion, and elastic/plastic behavior. The evaluated materials include asphalts AAB, AAD, ABD from Materials Reference Library Strategic Highway Research Program, chosen because variations crude source, chemical composition, elemental analysis. Analysis nano-indentation creep measurements corresponding phase-separated regions revealed heterogeneous domains with different mechanical properties, induced substantial microstructural change domains, including phase structure, distribution. form extent changes, however, were for each asphalt. Interpretation data collected microcopy this study advances understanding composition binders response under load, how responses aging.