Investigation of the rheological properties and micromorphology of waste plastic/bio-oil modified asphalt
This study investigated the feasibility of waste plastic/bio-oil modified asphalt (PBMA). The rheological behavior and micromorphology of PBMA were investigated. The results demonstrated that PBMA exhibited better storage stability. As the bio-oil content was 10 %, increasing the waste plastic dosag...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525004577 |
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| Summary: | This study investigated the feasibility of waste plastic/bio-oil modified asphalt (PBMA). The rheological behavior and micromorphology of PBMA were investigated. The results demonstrated that PBMA exhibited better storage stability. As the bio-oil content was 10 %, increasing the waste plastic dosage from 9 % to 12 % and 15 % resulted in a viscosity increase of 43mPa·s and 85mPa·s. The addition of waste plastic significantly improved the high-temperature rutting resistance, as reflected by the increased rutting index, higher recovery rate, and lower Jnr. However, the waste plastic negatively affected the low-temperature performance. As the waste plastic content was 12 %, increasing the bio-oil dosage from 12 % to 15 %, the m-value of PBMA increased by 16 %, and the stiffness modulus decreased by 11.6 %. The bio-oil enhanced the crack resistance of asphalt at −18°C. Compared to neat asphalt, the fatigue behavior of PBMA showed a substantial improvement. When the bio-oil dosage was 10 %, the optimal dosage of waste plastic should be set at 12 %. As the bio-oil dosage was 15 %, the waste plastic dosage should be increased to 15 %. The uniform dispersion of fluorescent structures was observed in PBMA 12–10 and PBMA 15–15, indicating complete dissolution of waste plastic in bio-asphalt. The SEM micromorphology indicated that the three-dimensional network appeared in modified asphalt. The utilization of waste plastic and bio-oil in modified asphalt promotes sustainable practices in road construction. |
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| ISSN: | 2214-5095 |