Mechanical performance of asphalt rejuvenated with various vegetable oils. (26th July 2021)

• Record Type: Journal Article
• Authors: Yan, Kezhen; Lan, Haozhen; Duan, Zheng; Liu, Wenyao; You, Lingyun; Wu, Shenghua; Miljković, Miomir
• Is Part Of: Construction & building materials. Volume 293(2021)
• Publication Date: 2021-07-26
• Subjects: Recycling of asphalt -- Reclaimed asphalt pavement (RAP) -- Rejuvenation -- Tung oil -- Waste cooking oil -- Pavement performance; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2021.123485
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Tung oil resulted in better high-temperature performance than waste cooking oil. Tung oil could make the low-temperature behaviour significantly more ductile. Both tung and waste cooking oils decreased cyclic indirect tensile stiffness. Waste cooking oil resulted in better fatigue behaviour but still needs improvement. Abstract: One of the measures for the effective reuse of reclaimed asphalt is the rejuvenation by tung oil and waste cooking oil, recently recognised as possible alternatives. The research objectives were the comprehensive investigation of base and SBS modified bitumen, and course-graded asphalt mixtures with different contents of these agents, in terms of standard Marshall stability, dynamic stability, freeze–thaw and low-temperature static indirect tension strength, cyclic stiffness and fatigue, and anti-aging performance. Most of the test results showed that the rejuvenated mixtures had better performance, and the specimens with tung oil performed better than those with waste cooking oil. The cyclic indirect tensile stiffness modulus and fatigue results indicated that stiffness that the rejuvenated specimens had lower stiffness, while those rejuvenated by waste cooking oil had better fatigue performance. As the result, the tung oil and waste cooking oil were identified as potentially effective rejuvenators, with tung oil having generally better performance.