Evaluation of terminal blend rubberized asphalt incorporating high crumb rubber content
Currently there has been a trend of increasing the rubber content in rubberized asphalt due to the obvious environmental and decarbonizing benefits of this technology. Terminal Blend Rubberized Asphalt (TBRA) appears to be a feasible approach to safely increase the waste rubber content within the as...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525000841 |
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| author | Yangquan Huang Kun Long Chi Qu Chuanqi Yan Changfa Ai Shengxiong Zhou |
| author_facet | Yangquan Huang Kun Long Chi Qu Chuanqi Yan Changfa Ai Shengxiong Zhou |
| author_sort | Yangquan Huang |
| collection | DOAJ |
| description | Currently there has been a trend of increasing the rubber content in rubberized asphalt due to the obvious environmental and decarbonizing benefits of this technology. Terminal Blend Rubberized Asphalt (TBRA) appears to be a feasible approach to safely increase the waste rubber content within the asphalt binder. This study attempts to discuss the feasibility of highly-dosed TBRA and conduct a comprehensive evaluation on this modified asphalt. To do so, TBRA of different rubber contents (30%, 40%, 50%) are produced. To achieve high desulfurization and thermal degradation of the CR particles, enhancing the stability and processability of the TBRA samples, higher preparation temperatures (220°C) and extended shearing times (6 hours) were employed. The study assesses how these production conditions affect the asphalt's microstructure, chemical composition, and viscoelastic properties, using fluorescence microscopy, ATR-FTIR, and rheology master curves for analysis. Results show that the terminal blending process leads to CR particle breakdown and rubber molecule depolymerization, enhancing workability and stability up to a rubber dosage limit of approximately 40 %. However, while TBRA shows excellent low-temperature performance and fatigue resistance, its high-temperature properties are moderate, suggesting further modifications with materials like SBS or rock asphalt could enhance its performance. |
| format | Article |
| id | doaj-art-d7e8a4f7d2454f00a22393aaadae433f |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-d7e8a4f7d2454f00a22393aaadae433f2025-01-26T05:03:52ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04285Evaluation of terminal blend rubberized asphalt incorporating high crumb rubber contentYangquan Huang0Kun Long1Chi Qu2Chuanqi Yan3Changfa Ai4Shengxiong Zhou5School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; Highway Engineering Key Lasboratory of Sichuan Province, Chengdu, Sichuan 610031, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; Highway Engineering Key Lasboratory of Sichuan Province, Chengdu, Sichuan 610031, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; Highway Engineering Key Lasboratory of Sichuan Province, Chengdu, Sichuan 610031, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; Highway Engineering Key Lasboratory of Sichuan Province, Chengdu, Sichuan 610031, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; Highway Engineering Key Lasboratory of Sichuan Province, Chengdu, Sichuan 610031, ChinaSchool of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; Highway Engineering Key Lasboratory of Sichuan Province, Chengdu, Sichuan 610031, China; Corresponding author at: School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China.Currently there has been a trend of increasing the rubber content in rubberized asphalt due to the obvious environmental and decarbonizing benefits of this technology. Terminal Blend Rubberized Asphalt (TBRA) appears to be a feasible approach to safely increase the waste rubber content within the asphalt binder. This study attempts to discuss the feasibility of highly-dosed TBRA and conduct a comprehensive evaluation on this modified asphalt. To do so, TBRA of different rubber contents (30%, 40%, 50%) are produced. To achieve high desulfurization and thermal degradation of the CR particles, enhancing the stability and processability of the TBRA samples, higher preparation temperatures (220°C) and extended shearing times (6 hours) were employed. The study assesses how these production conditions affect the asphalt's microstructure, chemical composition, and viscoelastic properties, using fluorescence microscopy, ATR-FTIR, and rheology master curves for analysis. Results show that the terminal blending process leads to CR particle breakdown and rubber molecule depolymerization, enhancing workability and stability up to a rubber dosage limit of approximately 40 %. However, while TBRA shows excellent low-temperature performance and fatigue resistance, its high-temperature properties are moderate, suggesting further modifications with materials like SBS or rock asphalt could enhance its performance.http://www.sciencedirect.com/science/article/pii/S2214509525000841Rubberized asphaltTerminal blendMaster curveHighly-dosedFTIRPerformance |
| spellingShingle | Yangquan Huang Kun Long Chi Qu Chuanqi Yan Changfa Ai Shengxiong Zhou Evaluation of terminal blend rubberized asphalt incorporating high crumb rubber content Case Studies in Construction Materials Rubberized asphalt Terminal blend Master curve Highly-dosed FTIR Performance |
| title | Evaluation of terminal blend rubberized asphalt incorporating high crumb rubber content |
| title_full | Evaluation of terminal blend rubberized asphalt incorporating high crumb rubber content |
| title_fullStr | Evaluation of terminal blend rubberized asphalt incorporating high crumb rubber content |
| title_full_unstemmed | Evaluation of terminal blend rubberized asphalt incorporating high crumb rubber content |
| title_short | Evaluation of terminal blend rubberized asphalt incorporating high crumb rubber content |
| title_sort | evaluation of terminal blend rubberized asphalt incorporating high crumb rubber content |
| topic | Rubberized asphalt Terminal blend Master curve Highly-dosed FTIR Performance |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525000841 |
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