Application of rejuvenators to improve the rheological and mechanical properties of asphalt binders and mixtures: A review

By Ali Behnood. Journal of Cleaner Production, 2019

342 citations recorded by the source corpus.

Abstract The use of recycled materials such as Reclaimed Asphalt Pavement (RAP) and Recycled Asphalt Shingle (RAS) in asphalt pavements is a valuable approach to construct sustainable pavements and to preserve natural resources and energy. However, the use of high amounts of RAP and RAS can potentially cause durability-related distresses such as cracking and raveling due to the presence of severely aged asphalt binders. Rejuvenators have been widely used to overcome this issue and to mitigate the problems associated with the use of aged binders. They can improve the viscoelastic and rheological properties of asphalt mixtures containing RAP and RAS. Much has been learned about various types of rejuvenating agents, techniques to apply these agents, and challenges associated with their applications. This article reviews the literature on the applications of various types of rejuvenators in paving industry and their effects on the properties of the aged binders. The techniques for rejuvenating the aged asphalt binders and the mechanism of rejuvenation are also reviewed. Moreover, methods to determine the optimum rejuvenator content to achieve optimized mechanical and durability properties of the asphalt binders and mixtures are discussed. The findings in this research show that rejuvenators can be successfully used to restore the properties of the aged binders. It is hoped that this review will serve as a guidelines for pavement engineers to better design the asphalt mixtures containing rejuvenators. This review will also help scientists to find future avenues of research on the applications of rejuvenators in asphalt industry.

Subfields: Civil and Structural Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/bbab909f7e6de61c19073f7ad4d6c172cd6c2f10

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Civil and Structural Engineering

1. D. Daneshvar
2. Hainian Wang
3. Ali Behnood
4. Zhanping You
5. Junfeng Gao
6. Heyang Ding
7. Aikaterini Varveri
8. X. Qu

In Polymers and Plastics

1. D. Daneshvar
2. Hainian Wang
3. Zhanping You
4. Junfeng Gao
5. Heyang Ding
6. X. Qu
7. Aikaterini Varveri
8. Ali Behnood

Citations in the corpus

• Towards an understanding of diffusion mechanism of bio-rejuvenators in aged asphalt binder through molecular dynamics simulation (2021, methodology): “The microscopic driving mechanisms of bio-rejuvenators to restore the performance of aged asphalt binder cannot be revealed through testing methods such as the rheologymethod (Behnood, 2019).”
• Estimation of the dynamic modulus of asphalt concretes using random forests algorithm (2020, background): “Due to the time- and temperature-dependent behaviour of asphalt binders (Behnood 2019, Behnood and Modiri Gharehveran 2019), |E∗| is influenced by the environmental and loading conditions.”