ABSTRACT

Adding recycling oils (also called as ‘recycling agents’ or ‘rejuvenators’) into the asphalt mixtures with Reclaimed Asphalt Pavement (RAP) and Recycled Asphalt Shingles (RAS) is a widely adopted strategy for improving potential resistance to cracking of recycled asphalt pavements. This study investigates the rheolgoical properties of two Bio-Oils and two Re-refined Engine Oil Bottoms (REOB) by using Dynamic Shear Rheometer (DSR) and Rotational Viscometer (RV) tests at various testing conditions, as well as their chemical properties by using the Fourier Transform-Infrared Spectroscopy (FTIR) measurement. The results are compared for the recycling oils after the Rolling Thin-Film Oven (RTFO), 20- and 40-hours Pressure Aging Vessel (PAV) aging. Furthermore, these four recycling oils were blended with a base binder at a high ratio (50%) and measured for their complex shear modulus and viscosity at various aging levels, as well as their infrared spectra. At the end, two recycling oils were selected to blend with a base binder at low ratios (2.9% and 5.7%) and measured for the standard Performance Grade (PG) properties and PG plus characteristics. The results of oil-asphalt low ratio blends indicate that recycling oil’s content plays an important role in aging behaviour of the binders, not only the type of recycling oils.

摘要

在再生沥青路面 (RAP) 和再生沥青瓦 (RAS) 的沥青混合物中添加再生油（也称为“再生剂”或“再生剂”）是一种广泛采用的策略，可提高再生沥青路面的潜在抗裂性。本研究通过使用动态剪切流变仪 (DSR) 和旋转粘度计 (RV) 在各种测试条件下测试两种生物油和两种再精炼发动机油底油 (REOB) 的流变特性，以及通过使用傅里叶变换红外光谱 (FTIR) 测量。比较滚动薄膜烘箱 (RTFO)、20 小时和 40 小时压力老化容器 (PAV) 老化后的回收油的结果。此外，这四种回收油以高比例 (50%) 与基础粘合剂混合，并测量它们在不同老化水平下的复杂剪切模量和粘度，以及它们的红外光谱。最后，选择两种回收油以低比例（2.9% 和 5.7%）与基础粘合剂混合，并测量标准性能等级 (PG) 特性和 PG plus 特性。油-沥青低比例混合物的结果表明，回收油的含量对粘合剂的老化行为起着重要作用，而不仅仅是回收油的类型。7%) 并针对标准性能等级 (PG) 特性和 PG plus 特性进行测量。油-沥青低比例混合物的结果表明，回收油的含量对粘合剂的老化行为起着重要作用，而不仅仅是回收油的类型。7%) 并针对标准性能等级 (PG) 特性和 PG plus 特性进行测量。油-沥青低比例混合物的结果表明，回收油的含量对粘合剂的老化行为起着重要作用，而不仅仅是回收油的类型。