| 抗裂型橡胶沥青物理力学性能试验研究 |
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| 引用本文： | 吴为东.抗裂型橡胶沥青物理力学性能试验研究[J].路基工程,2017,0(2):130-134. |
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| 作者姓名： | 吴为东 |
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| 作者单位： | 杭州都市高速公路有限公司, 杭州 310024 |
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| 摘 要： | 采用不同胶粉掺量、胶粉细度、拌和温度、拌和时间制备橡胶沥青，并测试橡胶沥青的针入度、软化点、延度、弹性恢复、粘度等指标，研究制备条件对橡胶沥青性能影响；同时，采用四组分法和红外光谱分析了橡胶沥青的微观结构。结果表明:橡胶沥青宜采用由货车轮胎磨细得到的20目胶粉，生产温度可为180℃~200℃，发育时间宜为60分钟，胶粉掺量应根据项目要求确定，但最低掺量不宜小于18%；根据对橡胶沥青微观结构分析结果，胶粉与基质沥青未发生复杂化学反应，橡胶沥青性能的提高主要源于胶粉与基质沥青混溶后的物理状态改变。
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| 关 键 词： | 胶粉 橡胶沥青 制备参数 微观结构 |
| 收稿时间： | 2019-11-09 |
Experimental Study on Physical and Mechanical Properties of Anti-cracking Rubber Asphalt |
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| Abstract: | The rubber asphalt was prepared by using different dosage and fineness of rubber powder, mixing temperature and mixing time. And study the influence of various factors on the performance of rubber asphalt by testing the needle penetration degree, softening point, the ductility, recovery of elasticity, the viscosity and other indexes. At the same time, the microstructure is analyzed by 4-component analysis test and IR spectrum analysis. The result shows that it is advisable to use 20 mesh rubber particles made from grinding waste tires, the production temperature shall be between 180℃~200℃, development time should be 60 minutes and powder content should be determined by requirement of the project, but shouldn’t be less than 18%. Based on the analysis of microstructure, there is no complex chemical reaction between the matrix asphalt and rubber powder. The performance improvement of rubber asphalt is mainly derived from the physical changes after mixing and dissolving of the matrix asphalt and rubber powder. |
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