沥青混合料是一种典型流变材料，采用经验性试验和流变模型可表征其特性，但试验研究却耗费了大量能源和时间。考虑到沥青混合料的宏观性能同其组分相性能和细观结构特征等密切相关，本项目首先以沥青混合料组分相分级为基础，分析组分相间作用机制，明确内部结构化特性，建立表征该机制和特性的评价指标；再则利用X-ray CT技术和图像处理技术识别沥青混合料试件内部结构，弄清组分相细观结构特征，以此建立考虑组分相性能、组分相间作用机制、内部结构化特性及细观结构特征的流变性能细观力学预测模型；最后基于沥青混合料流变性能细观力学预测模型定量分析组分相性能、细观结构特征及混合料设计指标等与流变性能之间的关系，实现性能优化的沥青混合料组成设计，分析组分相间可能存在的界面损伤对流变性能影响，建立表征界面损伤的流变性能细观力学模型及查明界面损伤开裂行为。项目研究成果可为考虑材料细观信息的沥青混合料组成设计提供科学理论依据。

Asphalt mixture, as a typical rheological material, it's mechanical properties can be expressed by means of experiential tests and rheological models, however, the laboratory tests are usually more costly and time consuming than other methods. The overall mechanical properties of asphalt mixture have tight relationship with properties of inclusions and characteristics of microstructures. Firstly, multiscale ananlysis of inclusions will be empolyed below the macroscale of asphalt mixture, the inreraction mechanism between inclusions is analyzed and internal structuralization characteristics is exposed, evaluation indices can express that are developed. In addition, the internal structure of asphalt mixture specimens is identidied using X-ray computed tomography technique and image processing technique, which can discriminate the internal structure characteristics of inclusions, and futhermore a rheological micromechanics model of asphalt mixture considering the mechanical behaviors of inclusions, interaction mechanism between inclusions, internal structuralization, microstructure characteristics is established. Finally, the relationship between mechanical behaviors of inclusion, microstructure characteristic, design parameters of mixtures and rheological properties are analyzed quantitatively based on the proposed rheological micromechanics model of asphalt mixture, composition design of asphalt mixture derived from macroscale properties optimazition is implemented. Moreover, the effect of interface damage between inclusions on rheological properties is analyzed, a rheological micromechanics model considering interface damage is presented and the behaviors of interfacial damage to crack is explored. The achievements will been maken in the research can supply the scientific theory foundation with composition design of asphalt mixture that microscale information of inclusions is taken into account.