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回收沥青路面或沥青混合料(RAP)中老化沥青是评定路面沥青老化程度的关键。现行标准《JTG E20—2011公路工程沥青及沥青混合料试验规程》中规定的沥青抽提回收方法存在不足。主要介绍了从不同真空度、离心速度角度用旋转蒸发器法回收RAP料中的老化沥青,并分析老化沥青性能,提出了老化沥青抽提回收的适合真空度和离心速度,以实现老化沥青性能的准确评价,指导厂拌热再生混合料的应用。
Recycling Bitumen or Asphalt (RAP) Aging bitumen is the key to assessing the degree of pavement tar aging. The current standard “JTG E20-2011 Highway Engineering Bitumen and Asphalt Mixture Test Procedures” provisions of the bitumen recovery method is inadequate. In this paper, we mainly introduce the recovery of aged asphalt from RAP by rotary evaporator from different degrees of vacuum and centrifugal velocity, analyze the properties of aged asphalt, and propose the suitable vacuum degree and centrifugal velocity for the recovery of aged asphalt to achieve the performance of aged asphalt Accurate assessment of the plant to guide the application of hot mixed renewable mix.