Experimental investigation of the effect of asphalt binder modified with nanosilica on the rutting,fatigue and performance grade |
| |
| Authors: | Gholamali Shafabakhsh Mana Motamedi Mahdi Firouznia Mehrdad Isazadeh |
| |
| Affiliation: | 1. Faculty of Civil Engineering, Semnan University, Semnan, Iran;2. Oil Chemistry Expert, Jey Petroleum Lab Expert, Isfahan, Iran |
| |
| Abstract: | This research was performed to investigate the effect of nano-silica on the asphalt binder performance grade, rutting, and fatigue. The rutting and fatigue performance was tested by Multiple Stress Creep and Recover (MSCR) and time sweep test. The low-temperature cracking was tested by Bending Beam Rheometer test (BBR). The results showed the good performance of nano-silica in high and intermediate temperatures. The results of MSCR test show better performance in rutting and recovery as a result of the elastomeric property of nano-silica even in high temperatures. Nano-silica had a negative effect on the low performance grade of asphalt binder. The addition of nano-silica to asphalt binder increased the fatigue life up to 2.8 times. The Fourier transform infrared spectroscopy (FTIR) analysis was used for chemical analysis. |
| |
| Keywords: | nano-silica multiple stress creep and recovery fatigue life time sweep rutting |
|
|
