解交联橡胶粉改性沥青的制备工艺

Preparation Technique of De-Crosslinking Rubber Modified Asphalt

摘要: 为确定解交联橡胶粉改性沥青的制备工艺，实验室通过调整改性沥青的制备温度和时间，采用针入度试验、软化点试验、延度试验研究了不同时–温反应进程的改性沥青性能演变规律。基于试验结果分析，硫化橡胶粉改性沥青的制备温度为200℃、剪切时间60 min；解交联橡胶粉改性沥青的制备温度为180℃、剪切时间60 min，与常规的硫化橡胶粉改性沥青相比，制备温度降低了约20℃，有利于节能减排。

Abstract: To determine the optimal preparation process for de-crosslinking rubber powder modified asphalt, the laboratory adjusted the preparation temperature and time of the modified asphalt and conducted the penetration test, the softening point test, and the ductility test to investigate the performance evolution of modified asphalt properties during different time-temperature reaction processes. Based on the analysis of experimental results, the preparation temperature for vulcanized rubber powder modified asphalt was established at 200˚C with a shearing time of 60 minutes. In contrast, the preparation temperature for de-crosslinking rubber powder modified asphalt was optimized at 180˚C with a shearing time of 60 minutes. Compared to conventional vulcanized rubber powder modified asphalt, the preparation temperature was reduced by about 20˚C, which favors energy conservation and emission reduction.