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采用受阻胺光稳定剂Tinuvin770对5种沥青进行改性,研究了Tinuvin770对沥青物理性能及其薄膜烘箱老化和紫外光老化性能的影响。结果表明,5种沥青的延度都因Tinuvin770的加入而显著增大,软化点略有降低。Tinuvin770对部分沥青的热氧和光氧老化性能均有良好的改善效果,对部分沥青的光氧老化有改善作用,但却加速了其热氧老化,而对部分沥青的热氧和光氧老化均有加速作用。
Five kinds of asphalt were modified with hindered amine light stabilizer Tinuvin770 to study the influence of Tinuvin770 on the physical properties of asphalt and its aging properties and UV aging properties. The results show that the ductility of five kinds of asphalt are all significantly increased due to the addition of Tinuvin770, and the softening point slightly decreases. Tinuvin770 has good effect on the thermal oxygen and photooxidation aging of some asphalt, and improves the photooxidation aging of some asphalt, but accelerates its thermal oxygen aging, while the thermal oxygen and photo-oxygen aging of some asphalt have Accelerate the role.