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Performance Evaluations of Warm-Mix Reaction-Rejuvenated SBS Modified Asphalt Mixtures Incorporated with Wax-Based Additive

Author

Listed:
  • Zihui Liu

    (School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China)

  • Qi Chen

    (School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China)

  • Junwen Pei

    (School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China)

  • Ruiyang Wang

    (Engineering Research Center of Transportation Materials of Ministry of Education, Chang’an University, Xi’an 710064, China
    School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China)

  • Weili Shen

    (School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China
    Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures, Wuhan Institute of Technology, Wuhan 430073, China)

  • Chao Huang

    (School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Jialiang Liu

    (Anhui Xinlu Construction Group Co., Ltd., Fuyang 236001, China)

  • Xiong Xu

    (School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China
    Hubei Provincial Engineering Research Center for Green Civil Engineering Materials and Structures, Wuhan Institute of Technology, Wuhan 430073, China)

Abstract

The high-performance, cleaner rejuvenation of aged SBS-modified asphalt mixtures (ASBSMAMs) has been a hotspot in asphalt research. Currently, the most popular rejuvenation method still involves hot-mix asphalt with a commonly used oil as the rejuvenator for recycling. However, high-quality, cleaner warm-mix rejuvenation technology for ASBSMAMs is still needed to enrich this field. This study considered adopting a polyurethane (PU) prepolymer and 1,4-butanediol diglycidyl ether (BUDGE) as reactive rejuvenators to achieve warm-mix reaction–rejuvenation to enhance the properties of ASBSMAMs with the use of a wax-based additive, Sasobit. A series of tests were conducted to realize this, including the viscosity–temperature correlation of the rejuvenated binders, as well as tests of the moisture-induced damage, high-temperature stability, low-temperature cracking resistance, and fatigue resistance of the rejuvenated mixtures. The results showed the following: through reaction–rejuvenation, Sasobit could reduce the viscosity of the rejuvenated SBSMA (RSBSMA) below 150 °C for warm mixing and slightly decrease the viscosity–temperature susceptibility; warm-mix reaction–rejuvenation helped to improve the resistance to water-immersion-induced damage and freeze–thaw damage in ASBSMAMs; the addition of Sasobit showed benefits in improving their resistance to permanent deformation, with the dynamic stability values exceeding 5700 pass/mm as more than 1% Sasobit was added; the flexural damage resistance of ASBSMAMs at low temperatures could be enhanced after warm-mix reaction–rejuvenation; and, under reaction–rejuvenation conditions, Sasobit did not reduce the fatigue resistance of the RSBSMAM and, conversely, at limited higher dosages, it worked more effectively. Overall, the studied warm-mix reaction–rejuvenation technology has been proven to be effective for the environmental recycling and reuse of ASBSMAMs at high quality.

Suggested Citation

  • Zihui Liu & Qi Chen & Junwen Pei & Ruiyang Wang & Weili Shen & Chao Huang & Jialiang Liu & Xiong Xu, 2024. "Performance Evaluations of Warm-Mix Reaction-Rejuvenated SBS Modified Asphalt Mixtures Incorporated with Wax-Based Additive," Sustainability, MDPI, vol. 16(12), pages 1-17, June.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:12:p:5234-:d:1418449
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