国产天然岩沥青及其混合料相关性能试验研究

Research on Performance of Modified asphalt with Domestic Natural Rock asphalt and the mixture

在70#基质沥青中掺加不同比例的天然岩沥青得到改性沥青,低温延度试验结果显示其延度几乎为0,通过对低温延度断裂力测试,表明断裂力越大低温延展性越差;通过不同掺量岩沥青改性沥青及SBS改性沥青混合料各项性能对比试验,并结合沥青胶结料评价结果,认为6%～8%掺量范围内的岩沥青改性沥青具有较好的高温及水稳定性能,适用于目前路面结构中面层,可以得到与SBS改性沥青混合料相当的路用性能。

The result of low temperature ductility test on the modified asphalt which comes from 70# asphalt blended with different proportions of natural rock asphalt shows that the ductility is almost 0.It shows that the greater the low temperature ductile breaking force the poorer of the modified asphalt through the breaking force of low-temperature ductility tests.It＇s considered that the modified asphalt within content of 6% to 8% shows well performance of high-temperature and water stability through comparative test on the performance of different content and SBS modified asphalt combined with the analyses result of asphalt binder test.It＇s fit for middle course of current road structure,and we can get the equivalent road performance with SBS modified asphalt mixture.