This study is an attempt to quantify the nonlinear rheological behavior of four different asphalt binders using linear amplitude sweep (LAS) test and large amplitude oscillatory shear (LAOS) test at intermediate temperatures (10 °C, 20 °C, and 30 °C) in unaged (UA) and short-term aged (STA) conditions. Additionally, the present study also relates the response of the asphalt binders under increasing strain amplitude, obtained from both test methods. LAS test results indicated improvement in the fatigue life of asphalt binders with an increase in temperature. The effect of ageing on fatigue life was found to be binder dependent. Lissajous–Bowditch (LB) plots and higher-order harmonic ratio \(I_{3} /I_{1}\) were found to be imperative analysis procedures to study the LAOS test results. The effect of instrument inertia at low strain and higher frequency, along with the deterioration of the binder at high strain amplitudes, led to distorted stress-strain LB curves, which resulted in ambiguous values of strain stiffening ratio \(S\). It was found that \(I_{3} /I_{1}\) can be appreciably correlated with the fatigue life \(N_{f}\) obtained from LAS test using the relationship \(N_{f} =0.2 \times ( \frac{I_{3}}{I_{1}} )^{-1.42}\). The relationship validated in the study is found to be independent of temperature, type of binder, and ageing condition.

这项研究是为了尝试在中间温度（10°C，20°C和30°C）下使用线性振幅扫描（LAS）测试和大振幅振荡剪切（LAOS）测试来量化四种不同沥青粘合剂的非线性流变行为在未老化（UA）和短期老化（STA）的情况下。此外，本研究还涉及从两种测试方法获得的沥青粘合剂在增加的应变幅度下的响应。LAS测试结果表明，随着温度的升高，沥青粘合剂的疲劳寿命得到改善。发现老化对疲劳寿命的影响取决于粘合剂。Lissajous–Bowditch（LB）图和高次谐波比率\（I_ {3} / I_ {1} \）被发现是研究LAOS测试结果的必要分析程序。在低应变和较高频率下仪器惯性的影响，以及在高应变幅度下粘合剂的劣化，导致应力-应变LB曲线变形，从而导致应变刚度比\（S \）的模棱两可。发现\（I_ {3} / I_ {1} \）可以与通过关系（（N_ {f} = 0.2 \ times ）从LAS测试获得的疲劳寿命\（N_ {f} \）显着相关。 （\ frac {I_ {3}} {I_ {1}}）^ {-1.42} \）。研究中证实的关系与温度，粘合剂类型和老化条件无关。