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Surface Modification of Recycled Polyester Fiber and Performance Evaluation of Its Asphalt Mastic and Mixture

Author

Listed:
  • Lei Xia

    (School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China
    China-Road Transportation Verification & Inspection Hi-Tech Co., Ltd., RIOH, Beijing 100088, China)

  • Dongwei Cao

    (School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China
    China-Road Transportation Verification & Inspection Hi-Tech Co., Ltd., RIOH, Beijing 100088, China)

  • Hongliang Zhang

    (Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China)

  • Mingming Zhang

    (School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China)

  • Lingyan Shan

    (Research Institute of Highway Ministry of Transport, Beijing 100088, China)

  • Haiyan Zhang

    (Research Institute of Highway Ministry of Transport, Beijing 100088, China)

  • Taiwei Wang

    (Research Institute of Highway Ministry of Transport, Beijing 100088, China)

Abstract

The use of recycled polyester fiber (Re-PET) partially addresses the scarcity of non-renewable polyester (PET), but its thermal resistance in asphalt mixtures is relatively low. To enhance the reutilization and thermal resistance of Re-PET, it was modified through in situ growth grafting with tetrahedral nanoSiO 2 . A novel nanoSiO 2 hybrid material (SiO 2 /Re-PET) was successfully prepared, and the effects of the surface modification on the morphology and thermal resistance of the Re-PET were investigated with the examination of its mechanism of modification. The results demonstrated an increase in the surface roughness and specific surface area of SiO 2 /Re-PET, as well as a higher melting point and structural stability compared to Re-PET. Subsequently, Re-PET and SiO 2 /Re-PET asphalt mastics under a filler–asphalt ratio of 1.0 were prepared, and their classical and rheological properties were investigated and compared. The results indicated an increase in the softening point and shear strength of SiO 2 /Re-PET asphalt mastic, as well as a significant improvement in its high-temperature performance. Furthermore, subsequent pavement performance tests revealed a significant improvement in the performance of SiO 2 /Re-PET asphalt mixtures compared to Re-PET asphalt mixtures. Consequently, the findings of this research promote the recycling of Re-PET, ultimately advocating for the sustainability of pavement construction.

Suggested Citation

  • Lei Xia & Dongwei Cao & Hongliang Zhang & Mingming Zhang & Lingyan Shan & Haiyan Zhang & Taiwei Wang, 2023. "Surface Modification of Recycled Polyester Fiber and Performance Evaluation of Its Asphalt Mastic and Mixture," Sustainability, MDPI, vol. 16(1), pages 1-22, December.
    • Handle: RePEc:gam:jsusta:v:16:y:2023:i:1:p:278-:d:1309089
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