| 脱硫胶粉改性沥青的性能研究 |
| Study on Properties of Desulfurized Rubber Powder Modified Asphalt |
| 投稿时间：2022-06-22 修订日期：2022-06-22 |
| DOI：10.12136/j.issn.1000-890X.2023.10.0796 |
| 中文关键词: 脱硫胶粉 改性沥青 热稳定性 高温性能 低温性能 |
| 英文关键词: desulfurized rubber powder modified asphalt thermal stability high-temperature performance low-temperature performance |
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| 中文摘要: |
| 研究脱硫胶粉改性沥青的性能。对不同掺量脱硫胶粉改性沥青进行针入度、软化点、延度、180 ℃粘度测试，确定脱硫胶粉的最佳掺量，然后对最佳掺量的脱硫胶粉改性沥青进行热稳定性和性能衰变测试、高温动态剪切流变测试和低温弯曲蠕变测试，研究其热稳定性、高温性能和低温性能。结果表明：脱硫胶粉的最佳掺量为基质沥青质量的24%；脱硫胶粉改性沥青的储存温度宜为165～175 ℃，储存时间不应超过48 h；与普通胶粉改性沥青和基质沥青相比，在相同温度条件下，脱硫胶粉改性沥青的复数剪切模量、抗车辙因子和蠕变速率增大，相位角和劲度模量减小，即脱硫胶粉能够有效改善改性沥青的高温性能和低温性能。 |
| 英文摘要: |
| The properties of desulfurized rubber powder modified asphalt were studied.The penetration，softening point，ductility and viscosity at 180 ℃ of modified asphalt with different content of desulfurized rubber powder were tested to determine the optimal content of desulfurized rubber powder.Then thermal stability and performance decay test，high-temperature dynamic shear rheological test and low-temperature bending creep test were carried out for modified asphalt with the optimal content of desulfurized rubber powder.The results showed that the optimal content of desulfurized rubber powder was 24% of the mass of base asphalt.The storage temperature of desulfurized rubber powder modified asphalt should be set at 165～175 ℃，and the storage time should not exceed 48 h.Compared with ordinary rubber powder modified asphalt and base asphalt，under the same temperature conditions，the complex shear modulus，anti-rutting factor and creep rate of desulfurized rubber powder modified asphalt increased，while the phase angle and stiffness modulus decreased，indicating that desulfurized rubber powder could effectively improve the high-temperature and low-temperature performance of modified asphalt. |
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