ABSTRACT
Asphalt mortar can be regarded as weak position in asphalt mixture, the deformation property of asphalt mortar affect the damage evolution process, however, it is hard to get the strain field of asphalt mortar by traditional method. Digital Image Correlation (DIC) method has been adopted to obtain the strain field of asphalt mortar under indirect tension test in this study. It is found that the proportion of high strain area to total asphalt mortar area is very low, by contrast, the theoretical distribution is more uniform, the strain variance increase rapidly at the later stage due to the strain localization; The modulus of asphalt mortar can be calculated by the result of strain of different stress state, the result show the modulus falls with time and the damage parameter increases with time for both AC-16 and SMA-16, the modulus of AC-16 is larger than that of SMA-16.
