Abstract
The weathering aging pattern is a time-consuming aging method although it is accessible to asphalt actual field aging conditions. The accelerated ultraviolet (UV) radiation aging in laboratory shows the same aging factors (such as heat, oxygen and UV radiation) as weathering aging, which can make the accelerated UV radiation aging in laboratory become a potential alternative to weathering aging. Therefore, it is necessary to build the equivalent relationship between these two aging patterns and then to shorten the required weathering aging durations by accelerated UV radiation aging simulation. Two types of base asphalt binder were selected as research objects and the evolution of their rheological properties including complex modulus (G*), phase angle (δ) and zero shear viscosity (ZSV) with indoor accelerated UV radiation aging durations was investigated. Then, based on logarithmic zero shear viscosity (log (ZSV)) values, the relationship between accelerated UV radiation aging and weathering aging of asphalt binder was built by utilization of two-reaction kinetic aging model and extrapolation of accelerated aging result to weathering aging result. Furthermore, the equivalent relationship between the two aging patterns was further validated in terms of molecular weight distribution and carbonyl index results. The results indicate that with the increase in accelerated UV aging time, values of complex modulus and zero shear viscosity gradually increase whereas values of phase angle decrease for both two base asphalt binders. The changing trend of log (ZSV) value with UV aging time fits well with two-reaction kinetic aging model. The 18-month weathering aging is demonstrated to be almost equivalent to 16−18-day accelerated UV aging by analyzing rheological, molecular weight distribution and carbonyl index results.
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The financial supports of Science and Technology of Henan Province-International Cooperation Project (Grant No. 182102410068), Construction Project of Innovative Science and Technology Talents Team in Henan Province (CXTD2011045), Natural Science Foundation of Hunan Province (Grant No. 2019JJ50023) and Industry key laboratory of transportation infrastructure security risk management of Changsha University of Science and Technology (Grant No. 18KF01) are gratefully acknowledged.
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Guo, S., Zhang, Y. & Tang, H. Investigation of relationship between accelerated ultraviolet radiation aging in laboratory and weathering aging for asphalt binder. Int. J. Pavement Res. Technol. 14, 466–472 (2021). https://doi.org/10.1007/s42947-020-0158-1
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DOI: https://doi.org/10.1007/s42947-020-0158-1