干法SBS改性沥青路用性能研究

采用改性沥青可以有效提升沥青混合料的路用性能,但目前湿法SBS改性沥青存在二次老化、改性剂掺假等问题。故文章采用干法SBS改性剂,进行干法SBS改性沥青混合料路用性能的研究。研究结果表明:在沥青中直接掺入干法SBS改性剂,可以有效提高沥青的软化点和延度,改性剂的掺量一般为4%~10%;通过对采用掺入不同掺量的干法SBS改性剂的AC-16沥青混合料路用性能分析,干法SBS改性剂的最佳掺量为8%,对AC-16的沥青混合料配合比进行设计,最佳油石比为4.8%,此时路用性能均能够满足规范要求,并且其性能与普通的SBS改性沥青混合料相当。研究成果可为学术研究和工程应用提供参考。

The use of modified asphalt can effectively improve the road performance of asphalt mixture,but the current wet SBS modified asphalt has problems such as secondary aging and adulteration of modifiers.This article uses dry SBS modifier to study the road performance of dry SBS modified asphalt mixture.The research results show that directly adding dry SBS modifier to asphalt can effectively improve the softening point and ductility of asphalt.The dosage of modifier is generally 4%to 10%.Through the anal-ysis of the road performance of AC-16 asphalt mixture with different dosages of dry SBS modifier,the optimal dosage of dry SBS modifier is 8%.The asphalt mixture ratio of AC-16 is designed,and the optimal oil-stone ratio is 4.8%.At this time,the road per-formance can meet the specification requirements,and its performance is equivalent to that of ordinary SBS modified asphalt mix-ture.The research results can provide reference for academic research and engineering applications.