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| 丁苯橡胶改性低标号沥青制备及高低温性能的研究 |
| Study on Preparation and High and Low Temperature Properties of SBR Modified Low-grade Asphalt |
| Received:June 28, 2024 Revised:June 28, 2024 |
| DOI：10.12137/j.issn.2095-5448.2026.01.0035 |
| 中文关键词: 低标号沥青；丁苯橡胶；改性；高温流变性能；低温蠕变性能 |
| 英文关键词: low-grade asphalt；SBR；modification；high temperature rheological property；low temperature creep performance |
| 基金项目: |
| 中图分类号: |
| Author Name | Affiliation | E-mail | | ZHU Fuwan* | Jiangsu Xiandai Road & Bridge Co.，Ltd | 973199228@qq.com | | LIU Anjun | Jiangsu Xiandai Road & Bridge Co.，Ltd | |
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| 中文摘要: |
| 采用丁苯橡胶（SBR）和硬质沥青颗粒对70#沥青进行复合改性，制备SBR改性低标号沥青，研究其高低温性能。结果表明：随着硬质沥青颗粒掺量的增大，低标号沥青的针入度和延度减小，软化点升高，粘度增大，当硬质沥青颗粒掺量超过25%后延度试验试样出现脆断，低标号沥青存在低温性能缺陷；随着SBR掺量的增大，SBR改性低标号沥青的针入度、135 ℃粘度和延度增大，软化点升高，SBR的掺加能够修正由于硬质沥青颗粒导致的低温性能衰减，SBR改性低标号沥青抵抗高温变形能力较优，车辙因子约为SBS改性沥青的2倍，低温蠕变性能介于70#沥青和SBS改性沥青之间。 |
| 英文摘要: |
| Styrene-butadiene rubber （SBR） and hard asphalt particles were used to composite modified 70# asphalt，preparation of SBR modified low-grade asphalt，the high temperature and low temperature properties were studied.The results showed that，with the content of hard asphalt particles increased，the penetration and ductility of the low-grade asphalt decreased，softening point and viscosity increased.When the content of hard asphalt particles exceeded 25%，the ductility test specimens exhibited brittle fracture，indicating a deficiency in the low temperature performance of the low-grade asphalt.With the content of SBR increased，the penetration，softening point，viscosity at 135 °C and ductility of the SBR modified low-grade asphalt increased，the addition of SBR could mitigate the degradation in low temperature performance caused by the hard asphalt particles，the SBR modified low-grade asphalt demonstrated superior resistance to high temperature deformation，the rutting factor was approximately twice that of SBS modified asphalt，the low temperature creep performance fell between that of 70# asphalt and SBS modified asphalt. |
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