摘要
对TLA/SBS复合改性沥青进行了RTOFT短期老化、PAV热老化及UV紫外老化试验.采用常规沥青试验和DSR试验对老化后沥青胶结料进行了相关性能试验,并与对照组SBS改性沥青进行了对比分析.试验结果表明:TLA/SBS复合改性沥青在经历不同老化后,其软化点和粘度上升,针入度下降,复数剪切模量上升,相位角下降.与SBS改性沥青相比,TLA/SBS复合改性沥青各项性能指标变化幅度相对较低.DSR温度扫描试验结果表明:TLA的加入能提高SBS沥青的抵抗热老化和紫外老化的能力,TLA/SBS复合改性沥青具有更强的抗老化性能.
TLA/SBS modified asphalt was aged by RTOFT short-term aging,PAV ther- mal aging and UV ultraviolet aging. The conventional asphalt test and DSR test were a- dopted to analyze the relative performance of TLA/SBS modified asphalt compared with that of SBS modified bitumen. The test results show that, after different aging tests, compared with that of SBS modified bitumen, the softening point and the viscosity of TLA/SBS modified bitumen increases, penetration decreased, complex shear modulus increased,the phase angle decreased the performance indicators of TLA/SBS modified asphalt changed relatively at a low amplitude. DSR temperature sweep test results show that the TLA addition can improve the SBS asphalt thermal aging and UV aging resist- ance ability,TLA/SBS modified bitumen has a stronger ~nti-~in~ no^f
出处
《交通科学与工程》
2013年第4期13-16,25,共5页
Journal of Transport Science and Engineering
