Rejuvenators are used to restore the properties of reclaimed asphalt pavement (RAP) binders through readjusting the balance between the asphaltene and maltene fractions. To properly understand the effect of rejuvenators, it is important to analyze the chemical changes in the rejuvenated binders and to relate these changes to the rheological properties of the binders. In this study, RAP binders were blended with a bio-based and an aromatic extract petroleum-based rejuvenator additive. Chemical and thermal techniques, such as differential scanning calorimetry (DSC), attenuated total reflection Fourier transform infrared (FTIR) spectroscopy, and saturate, aromatic, resin, and asphaltene determinator (SAR-AD) were used to analyze the control and rejuvenated RAP binders. Glass transition temperatures were obtained using DSC and correlated with rheological measurements using a dynamic shear rheometer (DSR) and a 4 mm plate geometry. From FTIR results, the evolution of the carbonyl and sulfoxide indices with aging were determined and correlated with the complex shear modulus DSR measurements at different aging stages. The SAR-AD analysis was used to determine the changes in the asphalt fractions with the addition of the rejuvenators. Temperature–frequency DSR sweeps and bending beam rheometer testing were conducted, and master curves were constructed for the different binders. From these master curves, the effect of the different rejuvenators on the crossover temperature, glass-transition temperature, and intermediate region temperature range (T_IR) was determined.

中文翻译：

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使用再生剂对沥青粘合剂的化学，热和流变性质的影响

再生剂用于通过重新调节沥青质和麦芽烯馏分之间的平衡来恢复再生沥青路面（RAP）粘合剂的性能。为了正确地理解再生剂的作用，重要的是分析再生的粘合剂中的化学变化并将这些变化与粘合剂的流变性相关联。在这项研究中，RAP粘合剂与生物基和芳烃萃取物石油基再生剂共混。化学和热技术，例如差示扫描量热法（DSC），衰减全反射傅立叶变换红外（FTIR）光谱，饱和，芳香族，树脂和沥青质测定剂（SAR-AD）用于分析对照和再生RAP粘合剂。使用DSC获得玻璃化转变温度，并将其与使用动态剪切流变仪（DSR）和4 mm平板几何形状的流变测量相关联。根据FTIR结果，可以确定羰基和亚砜指数随老化的变化，并与不同老化阶段的复数剪切模量DSR测量值相关。SAR-AD分析用于确定添加再生剂后沥青馏分的变化。进行了温度-频率DSR扫描和弯曲束流变仪测试，并针对不同的粘合剂建立了主曲线。从这些主曲线可以看出，不同的再生剂对交叉温度，玻璃化转变温度和中间区域温度范围的影响（确定了羰基和亚砜指数随老化的变化，并与在不同老化阶段的复数剪切模量DSR测量值相关。SAR-AD分析用于确定添加再生剂后沥青馏分的变化。进行了温度-频率DSR扫描和弯曲束流变仪测试，并针对不同的粘合剂建立了主曲线。从这些主曲线可以看出，不同的再生剂对交叉温度，玻璃化转变温度和中间区域温度范围的影响（确定了羰基和亚砜指数随老化的变化，并与在不同老化阶段的复数剪切模量DSR测量值相关。SAR-AD分析用于确定添加再生剂后沥青馏分的变化。进行了温度-频率DSR扫描和弯曲束流变仪测试，并针对不同的粘合剂建立了主曲线。从这些主曲线可以看出，不同的再生剂对交叉温度，玻璃化转变温度和中间区域温度范围的影响（进行了温度-频率DSR扫描和弯曲束流变仪测试，并针对不同的粘合剂建立了主曲线。从这些主曲线可以看出，不同的再生剂对交叉温度，玻璃化转变温度和中间区域温度范围的影响（进行了温度-频率DSR扫描和弯曲束流变仪测试，并针对不同的粘合剂建立了主曲线。从这些主曲线可以看出，不同的再生剂对交叉温度，玻璃化转变温度和中间区域温度范围的影响（Ť _IR）测定。