反应性助剂对SBS改性沥青流变性能的影响

Effect of Reactive Assistant on Rheological Properties of SBS Modified Bitumens

利用动态剪切流变仪(DSR)研究了反应性助剂用量对SBS改性沥青流变性能的影响。结果表明:反应性助剂使SBS改性沥青的储能模量G’和损耗模量G’’提高,相位角δ减小,车辙因子G*/sinδ增大,高温抗变形能力得到显著改善。

Effect of a reactive assistant with two different functional groups on rheological properties of SBS modified bitumen was investigated by Dynamic Shear Rheometer （DSR）. The results showed that the addition of the reactive assistant to bitumen increases both the elastic modulus G＇ and loss modulus G＇ ＇ and the modified bitumens exhibited higher complex modulus, lower phase angle at high temperatures. As a consequence, SBS modified bitumens with the reactive assistant displays excellent resistance to rutting, which is attributed to the promotion of the reactive assistant to chemical reaction between SBS and bitumen.