Identification of interfacial transition zone in asphalt concrete based on nano-scale metrology techniques

摘要: Abstract Identifying the nature of region where mastic meets aggregate surface (interfacial transition zone, ITZ) is very helpful in understanding some mechanisms that govern fracture behavior asphalt pavement. However, it rather difficult to identify and study ITZ by bulk techniques. In this study, nano-scale metrology techniques, including nanoindentation (NI), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectrometer (EDS), were employed explore micromechanics, microstructure, chemical properties ITZ. Experimental results show exists mixture thickness range from 5 μm 20 μm. The modulus value was found between mastic. microstructure observed be more compacted than This contributes significantly characterization concrete, which can provide realist inputs for micromechanical models.