Re-refined Engine Oil Bottoms (REOB) has been used in recycled asphalt materials for flexible pavements in recent decade, due to its effects on softening aged binder and relatively low cost. However, concerns on the pavement performance of those materials including REOB in asphalt binders have been reported and linked to the use of REOB. Consequently, methods for detecting and quantifying REOB in asphalt binders have seen increased interest to control the use of these recycled oils. This study is for the first time to introduce the use of the Partial Least Squares (PLS) regression in Attenuated Total Reflection-Flourier Transformed Infrared (ATR-FTIR) spectroscopy analysis of asphalt binders for determining REOB content. The PLS regression analysis gives the advantage of using the whole ATR-FTIR spectroscopy of REOB blends. The results show that an accurate prediction model can be derived by using the PLS regression analysis on the ATR-FTIR spectra of REOB blends.

近十年来，再精制发动机油底料 (REOB) 已被用于柔性路面的再生沥青材料，因为它对软化老化的粘合剂具有作用并且成本相对较低。然而，已经报道了对沥青粘合剂中包括 REOB 在内的材料的路面性能的担忧，并与 REOB 的使用有关。因此，检测和量化沥青粘合剂中 REOB 的方法已引起人们对控制这些回收油的使用的兴趣增加。本研究首次介绍了使用偏最小二乘法 (PLS) 回归对沥青结合料进行衰减全反射-弗洛里尔变换红外 (ATR-FTIR) 光谱分析以确定 REOB 含量。PLS 回归分析具有使用 REOB 混合物的整个 ATR-FTIR 光谱的优势。