The mechanical behavior of hot mix asphalt is affected by their constituent properties, i.e., aggregate and asphalt binder properties. The loading path used in laboratory testing is also a factor that may influence results. The objective of this work was to investigate the effect of aggregate particle shape properties and texture, as well as of the aggregate-binder adhesion, on different tests used to evaluate mixture resistance: indirect tensile strength in axial compression (ITS); moisture-induced damage—modified Lottman; uniaxial repeated load permanent deformation—Flow number (FN); dynamic modulus, both at compression and at tension/compression; and tension/compression fatigue life. The Aggregate Image Measurement System was used for analyzing aggregate particle shape properties. Asphalt Bond Strength test results were used as an indicator of aggregate-binder adhesion. The results indicate that the binder is relatively more important for tension/compression tests, while aggregate properties are relatively more important for compression tests. For the latter, the higher the load applied in the test, the greater the importance of the aggregate to the mixture result, which is expected since this favors interlocking. ITS and FN results appear to be strongly affected by aggregate sphericity and texture. Dynamic modulus at compression depends more on aggregate shape properties, while fatigue life is more influenced by aggregate-binder adhesion.

中文翻译：

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骨料形状特性和粘合剂对骨料的粘附性对热拌沥青压缩和拉伸/压缩试验结果的影响

热拌沥青的机械性能受其组成特性的影响，即集料和沥青结合料的特性。实验室测试中使用的加载路径也是可能影响结果的一个因素。这项工作的目的是研究骨料颗粒形状特性和质地以及骨料-粘合剂粘附力对用于评估混合物抗性的不同测试的影响：轴向压缩中的间接拉伸强度 (ITS)；湿气引起的损坏——改良的 Lottman；单轴重复载荷永久变形——流动数（FN）；压缩和拉伸/压缩时的动态模量；和拉伸/压缩疲劳寿命。骨料图像测量系统用于分析骨料颗粒形状特性。沥青粘合强度测试结果用作骨料-粘合剂粘合性的指标。结果表明，粘合剂对于拉伸/压缩测试相对更重要，而骨料特性对于压缩测试相对更重要。对于后者，在测试中施加的载荷越高，骨料对混合结果的重要性就越大，这是预期的，因为这有利于互锁。ITS 和 FN 结果似乎受到聚合球度和纹理的强烈影响。压缩时的动态模量更多地取决于骨料形状特性，而疲劳寿命更多地受骨料-粘合剂粘合力的影响。而骨料特性对于压缩测试来说相对更重要。对于后者，在测试中施加的载荷越高，骨料对混合结果的重要性就越大，这是预期的，因为这有利于互锁。ITS 和 FN 结果似乎受到聚合球度和纹理的强烈影响。压缩时的动态模量更多地取决于骨料形状特性，而疲劳寿命更多地受骨料-粘合剂粘合力的影响。而骨料特性对于压缩测试来说相对更重要。对于后者，在测试中施加的载荷越高，骨料对混合结果的重要性就越大，这是预期的，因为这有利于互锁。ITS 和 FN 结果似乎受到聚合球度和纹理的强烈影响。压缩时的动态模量更多地取决于骨料形状特性，而疲劳寿命更多地受骨料-粘合剂粘合力的影响。