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Author:

Guo, Meng (Guo, Meng.) (Scholars:郭猛) | Zhang, Shuaixiang (Zhang, Shuaixiang.) | Du, Xiuli (Du, Xiuli.) | Tan, Yiqiu (Tan, Yiqiu.) | Luo, Daisong (Luo, Daisong.)

Indexed by:

Scopus SCIE

Abstract:

In order to effectively evaluate the regeneration effects of different rejuvenators on aged asphalt binder, this study carried out a series of tests and evaluations on the macroperformance of virgin asphalt binder at various aging-regeneration stages. A commercial rejuvenator, aromatic oil, and warm mix agent were selected as rejuvenators. Fifteen asphalt binder samples involved various aging methods, including water-ultraviolet aging, water-free ultraviolet aging, rolling thin film oven test (RTFOT), and accelerated aging by pressurized aging vessel (PAV). High-temperature properties of asphalt binders were evaluated by softening point, and low-temperature properties of asphalt binders were evaluated by stiffness modulus and m-value. The viscoelastic properties were evaluated by complex modulus G*. Test results show that the regeneration effects of different rejuvenators were reflected in the reduction of softening point, stiffness modulus, and complex modulus. Based on performance changes of asphalt binder before and after aging, the reversibility indexes Rsp, RG*, RS, and Rm for quantitative evaluation of macroperformance of rejuvenated asphalt binders were proposed. Through linear fitting, it was found that R2 between the reversibility index Rsp and the reversibility index RG* reached 0.7574, and R2 between RS and Rm reached 0.8683. This provided the possibility of mutual transformation between those reversibility indexes. Last, the macroreversibility index of virgin asphalt binder (ARIV) was proposed. The softening point and stiffness modulus were taken as representative indexes to comprehensively evaluate the recovery of high-temperature, low-temperature, and viscoelastic properties of aged asphalt binder by different rejuvenators. This study provided a unified indicator to quantitatively evaluate the regeneration effect of rejuvenator on virgin asphalt binder. It is helpful for better understanding the aging-regeneration process of virgin asphalt binder and determining the optimum regeneration time and rejuvenator.

Keyword:

Aging Virgin asphalt binder Regeneration Reversibility rheology Unified indicator

Author Community:

  • [ 1 ] [Guo, Meng]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang, Shuaixiang]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 3 ] [Du, Xiuli]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 4 ] [Tan, Yiqiu]Harbin Inst Technol, Sch Transportat Sci & Engn, 73 Huanghe Rd, Harbin 150090, Peoples R China
  • [ 5 ] [Luo, Daisong]China Acad Transportat Sci, Res & Consulting Dept Rd Struct, 10 Hepingli East St, Beijing 100013, Peoples R China
  • [ 6 ] [Luo, Daisong]China Acad Transportat Sci, Mat Res Ctr, 10 Hepingli East St, Beijing 100013, Peoples R China

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Source :

JOURNAL OF MATERIALS IN CIVIL ENGINEERING

ISSN: 0899-1561

Year: 2023

Issue: 11

Volume: 35

3 . 2 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 6

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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