Abstract
Nowadays, one of the most challenging problems facing civil and transportation engineers, which consumes plenty of budgets (causes large amount of cost) for maintenance of asphalt roads, is asphalt destructions. Lots of efforts are done in order to increase the resistance and life span of asphalt, including development of bitumen properties. Bitumen is used broadly in road construction due to its appropriate properties; however, it has some major deficiencies which may lead to destructions of asphalt pavements. Therefore different bitumen modifications are implemented to achieve desired properties for different objectives, including (Such as) using rubber powder, waste materials, various polymers, etc. Recently, researchers are turning to nanotechnology to improve bitumen properties. Conducted studies on this topic (conducted research in this field) show that using modified bitumen by nanomaterial, increases the capacity of the pavement’s load bearing and decreases probable cracks due to fatigue during the operation life of the pavement. In this study, Nano Copper Oxide is used to develop rheological properties of bitumen. Nanoparticles have been added to bitumen with amount of 2.5, 3 and 5 percent and then Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) experiments have been conducted to investigate the effects of using nanoparticles in pure bitumen. Results show that adding Copper Oxide nanoparticles to bitumen improves the performance of base bitumen, especially at middle and low temperatures.
Highlights
Asphalt is the first choice for highway construction for its various advantages like: smoothness, easiness, short period of construction and simple maintenance. [1] With the rapid development of transportation systems and increase of loading and passing traffic, Asphalt’s usage is getting broad and more serious
The main goal of this research, besides investigating the performance of modified bitumen with Nano Copper Oxide, is to determine if there is any positive effect on the performance of pure bitumen PG 64-16, in low and high temperatures, because of using these nanoparticles as modifier To this aim, Dynamic Shear Rheometer and Bending Beam Rheometer tests were conducted on pure and modified bitumen samples, under unaged, short term aged and long term aged circumstances
These results show that rutting measurement for modified bitumen in 64-16 in its performance temperature (64°C) is above 2.2 kPa which is more than sharp requirements
Summary
Asphalt is the first choice for highway construction for its various advantages like: smoothness, easiness, short period of construction and simple maintenance. [1] With the rapid development of transportation systems and increase of loading and passing traffic, Asphalt’s usage is getting broad and more serious. In any weather conditions, especially hot weather, it is considered as one of the major destruction mechanisms in asphalt pavements, which can decrease the duration of service of pavement and hydroplaning when water is trapped in cracks. [3] Destructions happened during operation life of pavement are mainly including rutting, permanent deformations, and cracks due to fatigue. Adding modifiers like nanomaterials to improve performance of the bitumen and asphalt mixture is getting popular in recent years. Nanocomposite is one of the most popular materials discovered for developing the properties of bitumen and asphalt mixture. Nanotechnology is widely used in development of new generation of materials to improve the macroscopic properties of them with more satisfying performance. Development of nanocomposite materials mainly depends on betterment of the adherent of nanocomposite/bitumen matrix and homogeneous distribution of nanoparticles in bitumen matrix. [7]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
