作　　者： (畅润田）; (李永锋）; (庞瑾瑜）;

机构地区： 山西省交通科学研究院,太原030000

出　　处： 《石油沥青》 2017年第4期14-17,共4页

摘　　要： 从常规指标、动态剪切流变仪(DSR)以及混合料性能等方面描述了改性剂SBS掺量对沥青的影响情况。试验数据显示,高分子聚合物SBS的加入使改性沥青的模量、黏度增加,相角减小,并且改变幅值随掺量的增加更明显,说明SBS可以大幅提升沥青的变形和抗疲劳能力,这是由于SBS聚合物大分子在沥青内部交联成较为完善的空间网络结构。SBS掺量对沥青流变性能的改善效果与沥青常规指标的测试结果保持一致。 The effect of SBS content on modified asphalt rheological properties was investigated by con- ventional index, Dynamic Shear Rheometer （DSR） and mixture performance. The results showed that the ad- dition of high polymer increases both the complex modulus G＊ and viscosity η＊, decreases the phase angle, and changes are more obvious as SBS increasing. As a consequence, SBS modified asphalts exhibit excellent resistance to rutting, which is attributed to the formation of network structure with SBS polymer molecules in asphalt. The improvement of SBS content on the rheological properties of asphalt is consistent with convention- al three indexes tests.

关 键 词： 流变性能 掺量影响