This study dealt with an experimental squeeze-flow test between two parallel disks and rheological measurements using a rotational rheometer of pure bitumen and bitumen mixed with 10 and 20 wt.% kaolin without slip condition. The experimental procedure of the homogeneous samples’ preparation was described. A steady-state and dynamic rheological analysis for pure bitumen and bitumen mixed with kaolin was detailed. Results show that pure bitumen and bitumen mixed with 10 wt.% kaolin at 26 °C correspond to a shear-thinning behavior. The effect of the kaolin particles becomes more critical at low shear rates than at high shear rates, where the matrix effect was dominant. The influence of temperature on bitumen mixed with 20 wt.% kaolin was investigated, and the obtained results show that the samples behave like a power-law model at 50 °C. Besides, the squeeze-flow test impact at an ambient temperature of 26 °C for pure bitumen and bitumen mixed with kaolin was also studied. Adding kaolin leads to a significant increase in viscosity and confirms the studied cases in the rheometry test at 26 °C. It was proven that pure bitumen and bitumen mixed with kaolin follow a power-law model at a specific range of shear rate. In particular, the decrease of the shear rate in bitumen mixed with 20 wt.% kaolin triggers the detection of the yield stress, which did not appear in the rheological measurements due to the applied deformation either in the shear and/or the elongational flow.

本研究涉及两个平行圆盘之间的实验挤压流动测试和流变测量，使用纯沥青和混合 10 和 20 wt.% 高岭土的沥青的旋转流变仪，无滑移条件。描述了均质样品制备的实验过程。详细介绍了纯沥青和与高岭土混合的沥青的稳态和动态流变分析。结果表明，纯沥青和在 26 °C 下与 10 wt.% 高岭土混合的沥青对应于剪切稀化行为。高岭土颗粒的影响在低剪切速率下变得比在高剪切速率下更重要，在高剪切速率下，基质效应占主导地位。研究了温度对混合了 20 wt.% 高岭土的沥青的影响，所得结果表明，样品在 50 °C 时表现得像幂律模型。除了，还研究了纯沥青和与高岭土混合的沥青在 26 °C 环境温度下的挤压流动试验影响。添加高岭土会导致粘度显着增加，并在 26 °C 的流变测试中证实了所研究的情况。事实证明，纯沥青和与高岭土混合的沥青在特定剪切速率范围内遵循幂律模型。特别是，与 20 wt.% 高岭土混合的沥青中剪切速率的降低触发了屈服应力的检测，由于在剪切和/或伸长流动中施加的变形，该屈服应力没有出现在流变测量中。添加高岭土会导致粘度显着增加，并在 26 °C 的流变测试中证实了所研究的情况。事实证明，纯沥青和与高岭土混合的沥青在特定剪切速率范围内遵循幂律模型。特别是，与 20 wt.% 高岭土混合的沥青中剪切速率的降低触发了屈服应力的检测，由于在剪切和/或伸长流动中施加的变形，该屈服应力没有出现在流变测量中。添加高岭土会导致粘度显着增加，并在 26 °C 的流变测试中证实了所研究的情况。事实证明，纯沥青和与高岭土混合的沥青在特定剪切速率范围内遵循幂律模型。特别是，与 20 wt.% 高岭土混合的沥青中剪切速率的降低触发了屈服应力的检测，由于在剪切和/或伸长流动中施加的变形，该屈服应力没有出现在流变测量中。