利用生物废油改性沥青及其低温路用性能研究

摘要

To investigate the oil effect on the low temperature performance of asphalt,different oils,including bio﹣based and refined waste oil are used in this study,and Bending Beam Rheometer (BBR)test and Single Edge Notched Beam(SENB)test are employed to evaluate the effect of oil on low temperature performance of asphalt.It is found that the stiffness of asphalt decreased,m﹣value of asphalt increased,the fracture energy of asphalt increased after adding these oils.This means that these oils can improve the low temperature performance of asphalt.And in addition,Thermal Stress Restrained Specimen Test(TSRST)of asphalt mixture is used to verify the conclusion.The TSRST results show that the fracture temperature of oil modified asphalt mixture is much lower than neat asphalt mixture,which proves the conclusions of the advantages of oils used.%为提高沥青的低温性能且降低改性沥青的成本，采用经济环保的生物废油改性沥青技术。同时采用弯曲梁流变（BBR）试验和单边缺口梁（SENB）试验试验评估了油对沥青低温性能的影响。结果表明，当添加生物基和精炼废油后，沥青劲度降低，m 值提高，沥青的断裂能增加，表明生物基和精炼废油提高了沥青的低温性能。此外，沥青混合料的约束试件温度应力试验（TSRST）结果表明，与基质沥青混合料相比，油改性沥青混合料的冻断温度更低，这进一步验证了所选用的油可以提高沥青低温性能。