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| 不同老化及再生方式对沥青的路用性能试验研究 |
| Experimental Study on the Pavement Performance of Asphalt Binder Under Different Aging and Rejuvenator Methods |
| 投稿时间：2025-11-18 |
| DOI：10.16018/j.cnki.cn32-1650/n.202602009 |
| 中文关键词: 热氧 紫外光 再生剂 中温再生剂 沥青路用性能 |
| 英文关键词: thermo-oxidative ultraviolet rejuvenator medium-temperature rejuvenator pavement performance of asphalt |
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| 中文摘要: |
| 为探究热氧与紫外条件下老化沥青及其再生沥青的性能,对基质沥青、老化沥青及其再生沥青进行了3大指标分析、动力黏度测试和双边缺口拉伸试验,并采用傅里叶变换红外光谱仪测试了10种不同类型的沥青官能团指数。结果表明:温拌再生沥青的针入度、延度、临界裂纹尖端位移均小于热拌再生沥青,软化点、动力黏度值均大于热拌再生沥青;中温再生剂与XT-2再生剂均可很好地补充老化沥青中缺失的轻质组分,有较好的再生效果,其中中温再生剂补充轻质组分比XT-2再生剂有5.7%的效果提升。 |
| 英文摘要: |
| To investigate the performance of aged asphalt and its recycled counterparts under thermo-oxidative and ultraviolet aging conditions, conventional three-index tests, dynamic viscosity tests, and double-edge-notched tensile tests were conducted on virgin, aged , and recycled asphalt. In addition, Fourier Transform Infrared spectroscopy was employed to evaluate the functional group indices of ten different asphalt types. The results indicated that the penetration, ductility, and critical crack tip opening displacement(CTOD) of warm-mix recycled asphalt were all lower than those of hot-mix recycled asphalt, whereas its softening point and dynamic viscosity were higher. Both the medium-temperature rejuvenator and the XT-2 rejuvenator effectively replenished the depleted light components in aged asphalt, demonstrating good rejuvenation performance. Notably, the medium-temperature rejuvenator achieved a 5.7% greater improvement in replenishing light components compared to the XT-2 rejuvenator. |
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