This paper presents a comprehensive analysis of blended asphalt binders extracted from mixtures that contain various amounts of reclaimed asphalt pavements (RAP). The analysis is performed within a thermodynamically consistent non-linear viscoelastic (NVE) modeling framework, which has the advantage of accounting for the contributions of each of the constituents (i.e. virgin binder and RAP binder) to the response of the blended binder. In order to calibrate and validate the NVE model, the RAP blended binders were subjected to different testing protocols: frequency sweep, multiple stress creep and recovery, repeated creep and recovery with multiple stress levels, random creep and recovery, and stress relaxation. For the binders used in this study, linear viscoelasticity (LVE) was suitable to model the frequency sweep and multiple stress creep and recovery data, but it did not capture the repeated creep and recovery with multiple stress levels results that involved higher stress and strain levels. The NVE model, on the other hand, was successful in describing the repeated creep and recovery with multiple stress levels results. The validation was achieved by comparing the NVE model predictions with the random creep and recovery and stress relaxation test results. Finally, the paper recommends a new method, based on the parameters of the NVE model, to evaluate the rutting resistance of blended asphalt binders.

中文翻译：

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使用线性和非线性粘弹性框架分析再生沥青混合粘合剂

本文对从含有不同数量再生沥青路面 (RAP) 的混合物中提取的混合沥青结合料进行了全面分析。该分析是在热力学一致的非线性粘弹性 (NVE) 建模框架内进行的，其优点是考虑了每种成分（即原始粘合剂和 RAP 粘合剂）对混合粘合剂响应的贡献。为了校准和验证 NVE 模型，RAP 混合粘合剂接受了不同的测试协议：频率扫描、多应力蠕变和恢复、具有多个应力水平的重复蠕变和恢复、随机蠕变和恢复以及应力松弛。对于本研究中使用的粘合剂，线性粘弹性 (LVE) 适用于对频率扫描和多应力蠕变和恢复数据进行建模，但它没有捕获具有多个应力水平的重复蠕变和恢复结果，这些结果涉及更高的应力和应变水平。另一方面，NVE 模型成功地描述了具有多个应力水平结果的重复蠕变和恢复。通过将 NVE 模型预测与随机蠕变和恢复以及应力松弛测试结果进行比较来实现验证。最后，本文推荐了一种基于NVE模型参数的混合沥青结合料抗车辙性能评价新方法。成功地描述了具有多个应力水平的重复蠕变和恢复结果。通过将 NVE 模型预测与随机蠕变和恢复以及应力松弛测试结果进行比较来实现验证。最后，本文推荐了一种基于NVE模型参数的混合沥青结合料抗车辙性能评价新方法。成功地描述了具有多个应力水平的重复蠕变和恢复结果。通过将 NVE 模型预测与随机蠕变和恢复以及应力松弛测试结果进行比较来实现验证。最后，本文推荐了一种基于NVE模型参数的混合沥青结合料抗车辙性能评价新方法。