【摘要】 针对动态剪切流变仪 (DSR)在 SBS改性沥青等级评价中对试样 RTFOT前后往往相差一个等级的现象进行讨论 ,指出导致这一现象的主要原因是提高了改性沥青的抗老化性能 ,使 G* /sinδ增加量较小 ,且改性剂剂量越高这一现象表现的越明显。文中也对 DSR评价改性沥青的适用性进行了讨论更多还原

【Abstract】 The rheological properties of SBS modified bitum are tested by DSR. The results show that perfermance grade of SBS modified bitum decreased after RTFOT ageing. This is because that the increase of anti ageing property of SBS modified bitum bring, about a little increase of G */sinδ. This phenomenon becomes more visible while the content of modifier increasing. The applicability of DSR in evaluating SBS modified bitum is also discussed.更多还原