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直投SBS改性技术能够避免成品改性沥青在储存过程中的离析与指标衰减。为考察直投SBS改性技术的应用效果,以SBS-T改性剂、70#沥青为基础进行了试验室及实体工程应用研究。首先在室内模拟湿法制备了SBS改性沥青以确定改性剂的最佳掺量并进行配合比设计。在此基础上,依托河南S224淇县段改建工程修筑了直投SBS改性沥青混凝土试验段,通过与湿法的对比进行了应用效果评价。结果显示,通过直投SBS改性技术制备的沥青混凝土的性能指标与湿法相当,符合现行规范要求,具有广阔的推广前景。
Direct investment SBS modified technology to avoid the finished product modified asphalt segregation during storage and index attenuation. In order to investigate the application effect of direct investment SBS modification technology, the application research of laboratory and physical engineering was carried out based on SBS-T modifier and 70 # asphalt. First of all, SBS modified asphalt was prepared by wet simulation in laboratory to determine the optimal dosage of modifier and design the compounding ratio. On this basis, relying on the reconstruction project of Q224 Qixian County, Henan Province, a test section of SBS modified asphalt concrete was constructed, and the application effect was evaluated by comparison with wet method. The results show that the performance index of asphalt concrete prepared by direct investment SBS modification technology is equivalent to that of wet method and meets the requirements of current codes and has broad promotion prospects.