沥青-集料的交互作用能力是影响沥青混合料路用性能的重要因素.为了客观真实地表证沥青一集料交互作用能力,利用动态剪切流变仪(DSR)对沥青与4种集料作用后界面流变特性的变化进行了研究,结果证明了用三指标——沥青一集料交互作用系数曰、复数剪切模量系数△G*和复数粘度系数△η*表征沥青一集料交互作用能力的正确性和可行性.试验结果的灵敏度分析进一步表明:与复数剪切模量系数△G*和复数粘度系数△η*相比,沥青一集料交互作用系数曰表征沥青一集料交互作用能力具有更高的区分度.
Interaction capability of asphalt and aggregate is a crucial factor to affect the engineering performance of asphalt concrete mixtures. In order to evaluate this interaction more objectively and veritably, rheological characteristics of asphalt mastics with different mineral fillers are studied based on dynamic shear test. Results indicate that it is correct and feasible to characterize the interaction with indexes of asphalt-aggregate interaction coefficient B, complex shear modulus coefficient △G* and complex viscosity coefficient △η* Besides, sensitivity analysis of test results shows that B exhibits higher sensitivity compared with △G* and △η*.