【摘要】 收集并分析了部分普通道路沥青和热塑性弹性体SBS(苯乙烯 -丁二烯苯乙烯嵌段共聚物 )改性沥青的热老化试验数据 ,并对这 2类沥青结合料在热老化前后的粘度、动态剪切模量、蠕变劲度模量和拉伸试验结果进行分析 ,借以评价SBS改性沥青在老化前后的性能变化程度 .结果表明 :与普通道路沥青相比 ,SBS改性沥青在热老化试验后的性能衰变程度较低 ,显示出较高的抗疲劳性和低温柔韧性更多还原

【Abstract】 A quantity of data from heat-aging tests of the ordinarily asphalt and SBS (styrene-butadiene-styrene) modified asphalt are gathered and analyzed, and the tests of viscosity, dynamic shear module, creep stiffness module and tensile strength are performed to these asphalts, so that the behavior variety of them before and after heating condition are estimated. The results shows that the aging extent of the asphalt modified by SBS thermoplastic-polymer is lower then ordinarily asphalt after laboratory heat conditions, good resistance to fatigue and low temperature flexibility are showing.更多还原