| 基于转矩流变仪制备的超活化胶粉及其改性沥青的研究 |
| Study on Superactivated Rubber Powder Prepared Based on Torque Rheometer and Its Modified Asphalt |
| 投稿时间：2024-03-07 修订日期：2024-03-07 |
| DOI：10.12136/j.issn.1000-890X.2026.01.0055 |
| 中文关键词: 超活化胶粉 活化温度 螺杆转速 胶料性能 改性沥青 |
| 英文关键词: superactivated rubber powder activated temperature screw speed compound property modified asphalt |
| 基金项目: |
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| 中文摘要: |
| 利用转矩流变仪对废旧轮胎胎面胶粉进行活化处理以制备超活化胶粉，研究活化温度和螺杆转速对超活化胶粉胶料以及超活化胶粉改性沥青性能的影响。结果表明：提高活化温度，超活化胶粉混炼胶的门尼粘度和交联密度降低，超活化胶粉硫化胶的拉伸强度和拉断伸长率提高，超活化胶粉改性沥青的25 ℃针入度和5 ℃延度增大，软化点提高，超活化胶粉与沥青的离析程度降低；活化温度高于185 ℃时，超活化胶粉硫化胶的拉伸强度和拉断伸长率降低；提高螺杆转速，超活化胶粉混炼胶的门尼粘度和交联密度降低，超活化胶粉硫化胶的拉伸强度和拉断伸长率提高，超活化胶粉改性沥青的25 ℃针入度和5 ℃延度增大，软化点提高，超活化胶粉与沥青的离析程度降低；螺杆转速高于80 r·min-1时，超活化胶粉硫化胶的拉伸强度和拉断伸长率降低。综合考虑，活化温度为180 ℃、螺杆转速为80 r·min-1时，超活化胶粉的综合性能较优。 |
| 英文摘要: |
| The superactivated rubber powder was prepared by activation treatment of waste tire tread rubber powder using torque rheometer，and the influence of the activation temperature and screw speed on the properties of the compound of the superactivated rubber powder and the modified asphalt was studied.The results showed that by increasing the activation temperature，the Mooney viscosity and crosslinking density of the compound of the superactivated rubber powder decreased，the tensile strength and elongation at break of the vulcanizate of the superactivated rubber powder increased，the penetration of 25 ℃ and ductility of 5 ℃ of the modified asphalt with the superactivated rubber powder increased，the softening point was improved， and the segregation degree between the superactivated rubber powder and asphalt decreased.When the activation temperature was higher than 185 ℃，the tensile strength and elongation at break of the vulcanizate of the superactivated rubber powder decreased.By increasing the screw speed，the Mooney viscosity and crosslinking density of the compound of superactivated rubber powder decreased，the tensile strength and elongation at break of the vulcanizate of the superactivated rubber powder increased，the penetration of 25 ℃ and ductility of 5 ℃ of the modified asphalt with the superactivated rubber powder increased，the softening point was improved，and the segregation degree between the superactivated rubber powder and asphalt decreased.When the screw speed was greater than 80 r·min-1，the tensile strength and elongation at break of the vulcanizate of the superactivated rubber powder decreased.Overall，the superactivated rubber powder prepared at the activation temperature was 185 ℃ and the screw speed was 80 r·min-1 had better comprehensive performance. |
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