微表处技术在高等级公路路面养护中的应用研究

Study on Micro-surfacing Technology in Pavement Maintenance of High-grade Highways

为了比较SBS改性乳化沥青与橡胶粉改性沥青在微表处技术路面养护中的效果差异,通过对两种改性材料含量的筛选与控制,得到了两种改性材料在与沥青混合后的指标,选取其中指标结果较好的掺量范围:SBS改性剂掺量取3%~7%左右,橡胶粉最佳掺量为10%~15%左右。并且通过试验对两种混合料的路用性能做出评价,得出:SBS改性沥青材料作为路面材料在微表处技术中的车辙性能更优,而橡胶粉沥青材料作为路面材料在微表处技术中的抗滑性能更优。

In order to compare the effect difference between SBS modified emulsified asphalt and rubber powder modified asphalt in the micro-surfacing technology of pavement maintenance,the indexes of two modified materials after mixed with the asphalt are obtained by the screening and control of two modified material contents.The range of dosage with better index result is selected,in which the content of SBS modifier is about 3%~7%,and the best content of rubber powder is about 10%~15%.The pavement performances of two mixtures are evaluated through the experiments.The results show that SBS modified asphalt material as pavement material has the better rutting performance in the micro-surfacing technology,and the rubber powder asphalt material as pavement material has the better anti-slide performance in the micro-surfacing technology.