In order to improve the road performance of asphalt mixture in high altitude regions,different amounts of UV absorber(UV-531)/naphthenic oil(NPO)were selected for the composite modification of SBS asphalt.To investigate the effect of compound modifiers on the road performance of SBS modified as-phalt and mixtures.The results showed that the UV-531/NPO compound modifier significantly improved the low-temperature deformability and temperature-sensitive properties of SBS asphalt of SBS asphalt com-pared to the original SBS asphalt,but reduced the high-temperature performance of the asphalt(ductility increased by 117.6%,equivalent brittle point and temperature sensing coefficient decreased by 52.0%and 11.9%,equivalent softening point reduced by 2.3℃).At the same time,the compound modifier can significantly improve the low-temperature crack resistance of the mixture(9.61%reduction in bending stiffness modulus and 11.20%increase in maximum bending and tensile strain).However,it will have a certain degree of negative impact on its high-temperature stability and water stability.High altitude regions mainly consider the low-temperature crack resistance of the mixture.Hence,UV-531/NPO Compound modified asphalt and its mixture have great potential for application.
关键词
高寒高海拔/UV-531/NPO/复合改性沥青/沥青混合料/路用性能
Key words
high altitude regions/UV-531/NPO/compound modified asphalt/asphalt mixture/road performance
维普
万方数据