申请人:KRATON POLYMERS U.S. LLC
公开号:US10793720B2
公开(公告)日:2020-10-06
A method of forming a paving composition using reclaimed asphalt pavement (RAP) and/or reclaimed asphalt shingle (RAS) is provided. The method comprises: a) providing a rejuvenated asphalt binder consisting essentially of bitumen, a block copolymer and a bio-oil, wherein the rejuvenated asphalt binder has a rotational viscosity at 135° C. equal to or less than 1000 centipoise, an original G*/sin δ at 64° C. equal to or greater than 1 kPa where G* is the complex shear modulus and δ is the phase angle; a G*/sin δ at 64° C. equal to or greater than 2.2 kPa after aging in a Rolling Thin Film Oven (RTFO); b) providing a virgin asphalt; c) heating the virgin asphalt to 160-200° C.; d) providing a RAP and/or RAS; and e) mixing the heated virgin asphalt, RAP/RAS, and the rejuvenated asphalt binder under conditions suitable to form the paving composition.
提供了一种使用再生沥青路面(RAP)和/或再生沥青瓦(RAS)形成铺路组合物的方法。该方法包括: a) 提供主要由沥青、嵌段共聚物和生物油组成的再生沥青粘结剂,其中再生沥青粘结剂在 135 摄氏度时的旋转粘度等于或小于 1000 厘泊,64 摄氏度时的原始 G*/sin δ 等于或大于 1 千帕,其中 G* 是复剪切模量,δ 是相位角;64 摄氏度时的 G*/sin δ 等于或大于 2.2 千帕,其中 G* 是复剪切模量,δ 是相位角;64 摄氏度时的 G*/sin δ 等于或大于 2.2 千帕,其中 G* 是复剪切模量,δ 是相位角。b) 提供原生沥青; c) 将原生沥青加热至 160-200 摄氏度; d) 提供 RAP 和/或 RAS;以及 e) 在适合形成铺路组合物的条件下,将加热的原生沥青、RAP/RAS 和再生沥青粘结剂混合。