Evaluation the Effect of Nano-Al2O3 on the Fatigue Resistance of Rubberized Asphalt Mixtures

Articles in Press

Document Type : Research Paper

Authors

1 Department of civil engineering, Payame Noor university (PNU), P.O.Box: 19395-4697, Tehran, Iran.

2 department of civil engineering. germi branch. islamic azad university. germi. iran

Abstract

In recent years, the upward trend in repair and maintenance costs for pavements has been increasing due to the increase in the amount and frequency of traffic loads on pavements, has led to an increase in the tendency to use modified asphalt mixtures, especially in areas with high traffics. Many studies have been done to identify the appropriate additive for use to improve the behavior of bitumen and mixtures. The efficiency and effect of Nano Al2O3 as additive in bitumen and rubberized asphalt mixturs in order to improve their performance against external loads and environmental factors was evaluated in this study.In order to achieve the objectives of this study, bitumen with different percentages of Nano Al2O3 (0, 0.5, 1.0 and 1.5%) was combined and subjected to physical and rheological tests. Also, for evaluating the functional properties of nano modified samples, various experiments were carried out including 4point bending fatigue test and wheel track. The results of this study show that improving the bitumen behavior in moderate and high tempratures can be led to decrease of fatigue and rutting failure in asphalt mixtures. Evaluation on the results showed that using of 20% rubber powder and 1.5% Al2O3 has the best effects on the rheological behavior of bitumen. Also using of this bitumen can improve the asphalt mixture fatigue behavior.

Keywords

International Journal of Transportation Engineering

Articles in Press, Accepted Manuscript
Available Online from 05 February 2024

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