废食用油与废润滑油对老化沥青物理与流变特性影响的对比研究

摘要

通过对沥青老化与再生前后的常规物理性能与流变性能进行实验研究,对比分析废食用油和废润滑油对老化沥青物理与流变特性影响的差异性.结果表明,当废食用油和废润滑油的掺量分为7％,20％时,老化沥青的针入度、软化点、延度恢复至原样沥青的90％以上,而蠕变劲度模量低于原样沥青,蠕变速率大于原样沥青;复合模量、相位角以及车辙因子均低于原样沥青.这说明两种废油都可以软化老化沥青,可以作为沥青再生剂使用,但是不同废油对沥青再生的机理以及对不同沥青的再生效果仍需进一步研究.%The physical and rheological properties of aging and recycling asphalt were investigated by experimental research.The differences in physical and rheological properties of aged asphalt were compared with waste cooking oil and waste lubricating oil.The results indicate that,when the dosage of waste cooking oil is 7％ and waste lubricating oil is 20％,the penetration,softening point and ductility of rejuvenated asphalts can be restored to more than 90％ of the original asphalt.However,the creep stiffness modulus is lower and creep rate is higher than that of origin asphalt.Complex modulus,phase angle and rutting resistance factor of rejuvenated asphalt are lower than that of origin asphalt This result suggests that both waste cooking oil and waste lubricating oil can soften the aged asphalt,which can be used as the rejuvenator.But the rejuvenate mechanism of different waste oils to aged asphalt and the rejuvenate effect for different asphalt still need to be further investigated.