生物柴油再生沥青胶结料性能

为研究生物柴油再生沥青胶结料的粘附性能与流变性能。通过三大指标和布氏黏度分析生物柴油对老化沥青常规性能的影响；采用车辙因子评价高温性能，疲劳性能通过线性振幅扫描试验（LAS）测试，并基于粘弹性损伤模型（VECD）对疲劳寿命预测；通过测试有机溶剂与沥青试样的接触角分析其粘附性。结果表明：生物柴油掺量2%~3%时，能有效恢复老化沥青的三大指标，2%掺量生物柴油可使老化沥青的黏度恢复至基质沥青水平；生物柴油的加入降低了沥青的高温性能，掺量越大沥青试样生物高温临界温度越低，但能显著提高沥青的疲劳性能，掺量达到2%时，路面产生 5%应变时的疲劳寿命约是基质的1.28倍，产生2.5%应变时约是基质的1.39倍。3%掺量生物柴油再生沥青与两种集料的界面粘附强度均大于基质沥青，其与玄武岩的粘附功达到65.69 mJ·m-2，与花岗岩的可达51.73 mJ·m-2。

Study on Properties of Biodiesel Recycled Asphalt Binder

In order to study the adhesion and rheological properties of biodiesel recycled asphalt binder. The effect of Biodiesel on the conventional properties of aged asphalt was analyzed by three indexes and Brinell viscosity; The rutting factor is used to evaluate the high temperature performance. The fatigue performance is tested by linear amplitude scanning test (LAS) and the fatigue life is predicted based on viscoelastic damage model (VECD); The adhesion was analyzed by measuring the contact angle between organic solvent and asphalt sample. The results show that the three indexes of aged asphalt can be effectively restored when the content of biodiesel is 2% ~ 3%, and the viscosity of aged asphalt can be restored to the level of matrix asphalt when the content of biodiesel is 2%; The addition of biodiesel reduces the high-temperature performance of asphalt. The greater the content, the lower the biological high-temperature critical temperature of asphalt sample, but it can significantly improve the fatigue performance of asphalt. When the content reaches 2%, the fatigue life of pavement with 5% strain is about 1.28 times that of matrix and 1.39 times that of matrix with 2.5% strain. The interfacial adhesion strength between 3% biodiesel recycled asphalt and the two aggregates is greater than that of matrix asphalt, and the adhesion work with basalt is 65.69 mJ·m-2 and granite is 51.73 mJ·m-2.