橡胶沥青制备工艺及其性能的研究

首先通过室内试验研究了不同粒径、不同掺量的废轮胎橡胶粉对基质沥青的改性效果,而后研究了橡胶沥青的性能随反应温度、时间的变化规律.结果表明:采用粒度为80目、量15％(质量分数)的橡胶粉制备橡胶沥青,其性能最优.橡胶沥青的性能与反应温度、时间之间具有很强的依赖性.当反应温度高于200℃,反应时间超过60min的条件下,随着反应温度的升高和时间的延长,橡胶沥青的粘度显著下降.在高温条件下,当反应时间超过4h后,橡胶沥青的性能开始老化.基于试验研究结果,对橡胶沥青的生产及应用提出了几点建议.

Preparation process and performance of asphalt-rubber

The effect of crumb rubber with different particle sizes and contents on the properties of crumb rubber modified asphalt, and a change rule of performance of asphalt rubber with reaction temperature and time were studied. The results indicate that asphalt rubber has the best performance when 80 mesh and 15 ％ crumb rubber mass content were applied. The performance of asphalt-rubber strongly depends on the reaction temperature and time. When reaction temperature is higher than 200℃ and reaction more than 60 minutes, the viscosity of asphalt-rubber significantly declines with reaction temperature and time increasing. The asphalt rubber starts aging when reaction time is longer than 4 hours at high temperatures. Based on these results, some suggestions for production and application of asphalt rubber were put forth.