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由于煤油在沥青中的不稳定存在,为了研究煤油基降黏添加剂对沥青性能的影响,设计了两阶段的分析过程:在拌碾阶段,评价添加剂对沥青黏度的影响,进而确定合理掺量;在服役阶段,由短期老化后沥青的基本技术指标,评价添加剂残留物对服役期沥青性能的影响。分析结果表明:掺加煤油或煤油基添加剂不改变沥青的流体特性并有明显的降黏效果;存在沥青黏度随添加剂掺量而变化敏感性转折区,可以用来确定添加剂的合理掺量。与只使用煤油的对比试验表明:添加剂中的补偿成分可以改善煤油残留对沥青高温性能、温度敏感性及与矿料间的黏附性的不利影响,是煤油基温拌降黏添加剂的必要组成成分。
Due to the unstable kerosene in asphalt, a two-stage analysis process was designed to study the effect of kerosene based viscosity reducer on asphalt performance. During the mixing stage, the influence of additives on the viscosity of asphalt was evaluated, In the service phase, the basic technical index of asphalt after short-term aging is used to evaluate the influence of additive residues on asphalt performance during service. The results show that adding kerosene or kerosene based additives does not change the fluid properties of asphalt and has obvious viscosity reduction effect. There is a sensitive transition zone where asphalt viscosity changes with additive dosage, which can be used to determine the reasonable dosage of additives. Compared with the kerosene only, the compensation components in the additive can improve the adverse effect of the kerosene residue on the high temperature performance, temperature sensitivity and adhesion between the kerosene and asphalt, and is an essential component of the kerosene base temperature mixing and viscosity reducing additive .