Investigating the effect of using nanomaterials (clay, iron oxide, carbon particles) on improving the functional properties of asphalt

Annually, a part of the budget of different countries is spent on repairing and repairing the damages caused to the pavements. In our country, where most of the pavements are asphalt and the low resistance of pavements to dynamic loads and their short service life are among the most important problems in the field of road protection and maintenance, which cause various breakdowns on the road. Instrumentation begins. Nanotechnology is used in pavement engineering due to its unique properties in improving the properties of asphalt mixtures. In the present study, a review of new ideas for the use of nano-clay, nano-iron oxide, carbon nanoparticles with different percentages as a modifying additive in asphalt bitumen has been done. Then, the mechanical properties and behavior and temperature sensitivity properties of the modified asphalt mixture with nanomaterials that have the ability to improve the performance of the flexible asphalt surface are investigated. And the effect of using nanoparticles with lower percentages and better performance for a way resistant to environmental factors with a longer useful life on the asphalt mixture has been obtained. Research shows that the addition of optimal amounts of nanomaterials to modify asphalt bitumen increases the strength, durability, flexibility, fatigue resistance, slip resistance, impermeability and ease of application of asphalt mixtures. Therefore, improving the mentioned properties increases the service life of flexible pavement.