The chemical and rheological properties of polymer modified bitumen incorporating bio-oil derived from waste cooking oil (WCO) were investigated in this paper. At first, the chemical composition and mixing mechanism of the experimental materials were analysed from the perspective of functional group, and the influence of bio-oil on the activation energy was also researched. Then, the effect of bio-oil on the rotational viscosities of polymer modified bitumen and construction temperatures of corresponding mixtures was studied. Finally, the shear and bending rheological properties of polymer modified bitumen containing bio-oil were investigated. The results show that the bio-oil and styrene–butadiene–styrene (SBS) modified bitumen is mainly physically mixed, the addition of bio-oil decreases the activation energy of SBS modified bitumen. Additionally, the SBS modified bitumen containing bio-oil has lower viscosity values, and corresponding mixtures also have lower construction temperatures. Furthermore, the addition of bio-oil in SBS modified bitumen reduces the shear modulus and increases the bending creep compliance, which means bio-oil has positive effect on the low-temperature thermal cracking resistance performance while sacrificing the high-temperature rutting resistance performance to some extent. Therefore, the incorporation of WCO-based bio-oil in polymer modified bitumen is a promising technique to be used in cold regions where the low-temperature problems are more crucial.

中文翻译：

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掺入来自废食用油的生物油的聚合物改性沥青的化学和流变特性

本文研究了聚合物改性沥青的化学和流变特性，其中包含来自废食用油 (WCO) 的生物油。首先从官能团的角度分析了实验材料的化学成分和混合机理，并研究了生物油对活化能的影响。然后，研究了生物油对聚合物改性沥青旋转粘度和相应混合物施工温度的影响。最后，研究了含生物油的聚合物改性沥青的剪切和弯曲流变性能。结果表明，生物油与苯乙烯-丁二烯-苯乙烯（SBS）改性沥青主要是物理混合，生物油的加入降低了SBS改性沥青的活化能。此外，含有生物油的SBS改性沥青具有较低的粘度值，相应的混合物也具有较低的施工温度。此外，在SBS改性沥青中加入生物油降低了剪切模量，增加了弯曲蠕变柔量，这意味着生物油对低温抗热裂性能有积极影响，同时牺牲了高温抗车辙性能。在一定程度上。因此，在聚合物改性沥青中加入基于 WCO 的生物油是一种很有前途的技术，可用于低温问题更为关键的寒冷地区。SBS改性沥青中生物油的加入降低了剪切模量，增加了弯曲蠕变柔量，这意味着生物油对低温抗热裂性能有积极影响，同时在一定程度上牺牲了高温抗车辙性能. 因此，在聚合物改性沥青中加入基于 WCO 的生物油是一种很有前途的技术，可用于低温问题更为关键的寒冷地区。SBS改性沥青中生物油的加入降低了剪切模量，增加了弯曲蠕变柔量，这意味着生物油对低温抗热裂性能有积极影响，同时在一定程度上牺牲了高温抗车辙性能. 因此，在聚合物改性沥青中加入基于 WCO 的生物油是一种很有前途的技术，可用于低温问题更为关键的寒冷地区。