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Healing Evaluation of Asphalt Mixtures with Polymer Capsules Containing Rejuvenator under Different Water Solutions

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  • Zhifeng Li

    (State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Mafangshan Campus, Wuhan 430070, China)

  • Huan Wang

    (State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Mafangshan Campus, Wuhan 430070, China)

  • Pei Wan

    (State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Mafangshan Campus, Wuhan 430070, China)

  • Quantao Liu

    (State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Mafangshan Campus, Wuhan 430070, China
    Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City, Zhongshan 528400, China)

  • Shi Xu

    (School of Civil Engineering and Architecture, Wuhan University of Technology, Mafangshan Campus, Wuhan 430070, China
    Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands)

  • Jian Jiang

    (Shenzhen Sez Construction Group Co., Ltd., Shenzhen 518034, China)

  • Lulu Fan

    (Shenzhen Sez Construction Group Co., Ltd., Shenzhen 518034, China)

  • Liangliang Tu

    (Shenzhen Sez Construction Group Co., Ltd., Shenzhen 518034, China)

Abstract

Polymer Ca-alginate capsules with rejuvenator bring a high healing level for asphalt concrete under dry healing environments; however, the healing levels of bituminous mixtures containing capsules under water healing conditions are still unknown. In view of this, this study aimed at exploring the healing levels of asphalt concrete containing polymer capsules under various solution healing conditions following cyclic loads. This study involved the preparation of capsules, followed by the evaluation of their morphological characteristics, resilience to compression, thermal endurance, and rejuvenator content. The assessment of the healing properties of asphalt concrete utilizing capsules was conducted through a fracture–heal–refracture examination. This study conducted Fourier transform infrared spectrum experiments to determine the rejuvenator release ratio of capsules under dry conditions and the remaining rejuvenator content in extracted bituminous binder from capsule–asphalt concrete after solution treatment. Meanwhile, a dynamic shear rheometer was utilized to investigate the rheological characteristics of asphalt binder. Results revealed that the healing ratios of capsule–asphalt concrete beams under a dry healing environment were significantly higher than that of beams under various solution healing conditions, and the alkali solution has the worst effect on the improvement in healing ratio. The coupled impact of moisture intrusion and ion erosion resulted in an enhancement of complex modulus of asphalt binder while concurrently reducing its phase angle. Consequently, the restorative capacity of the asphalt binder was weakened.

Suggested Citation

  • Zhifeng Li & Huan Wang & Pei Wan & Quantao Liu & Shi Xu & Jian Jiang & Lulu Fan & Liangliang Tu, 2023. "Healing Evaluation of Asphalt Mixtures with Polymer Capsules Containing Rejuvenator under Different Water Solutions," Sustainability, MDPI, vol. 15(21), pages 1-21, October.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:21:p:15258-:d:1267003
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    References listed on IDEAS

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    1. Yuan, Dongdong & Jiang, Wei & Sha, Aimin & Xiao, Jingjing & Wu, Wangjie & Wang, Teng, 2023. "Technology method and functional characteristics of road thermoelectric generator system based on Seebeck effect," Applied Energy, Elsevier, vol. 331(C).
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