Investigating the effect of nanoparticles on the rutting behaviour of hot-mix asphalt |
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Authors: | Fereidoon Moghadas Nejad Javad Tanzadeh Gholam Hossein Hamedi |
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Affiliation: | 1. Department of Civil and Environmental Engineering, Amirkabir University of Technology, P.O. Box 15875, Tehran, Iran;2. Islamic Azad University Bandar Anzaly Branch, Gilan, Iran |
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Abstract: | Rutting is considered as one of the major damages in asphalt mixtures. In this study, different types of nanoparticles such as TiO2, Al2O3, Fe2O3 and ZnO in different percentages were added to the base asphalt binder in order to decrease the rutting potential of hot-mix asphalt (HMA). In the first step, asphalt binder tests for characteristics such as penetration grade, ductility, softening point and viscosity were performed on the asphalt binder modified by the nanoparticles. Then, after preparing HMA samples, the static creep test was done at two stress levels at a specific temperature. Results of this study showed that using the nanoparticles improved the behavioural properties of the asphalt binder and decreased rutting in asphalt mix samples. Furthermore, scanning electron microscope images taken from the asphalt binder samples modified by the nanoparticles demonstrated that these nanoparticles were properly distributed in the asphalt binder space and had a positive effect on the rutting performance of the asphalt mixes. |
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Keywords: | hot-mix asphalt rutting modified asphalt binder nanoparticles static creep |
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