将废轮胎制成胶粉对沥青进行改性不仅可以实现这些“黑色垃圾”的再利用，减少环境污染，而且能有效提升沥青的路用性能，以满足现代交通对沥青材料的性能需求，因此具备重要的经济和社会意义。然而，储存稳定性差、改性机理不明确这些关键科学问题的存在制约了橡胶粉改性沥青的发展。本项目拟基于相似相容原理，从分子设计的角度出发，开展废橡胶粉的接枝改性研究；探索接枝改性对橡胶粉改性沥青性能尤其是储存稳定性的影响，提出解决橡胶粉改性沥青相分离等关键问题的有效解决方案；利用Image－Pro显微镜图像分析软件结合SEM和AFM对改性沥青的微观结构进行测试和量化分析，以橡胶粉颗粒在改性沥青中的平均面积和平均粒径为结构参数，建立相容性与改性沥青性能的关系；基于浓悬浮液流变理论与模型，建立显微结构与流变性能之间的关系，从理论上解释橡胶粉改性前后沥青性能的变化，揭示改性机理，为橡胶粉改性沥青的发展提供科学依据。

The application of rubber powder made from waste tire to asphalt not only achieve recycling of these black garbage, reduce environmental pollution, but also can effectively improve the pavement performance of asphalt, so it has important economic and social meanings. However, there are some key scientific problems that have not been solved, such as the store stability at high temperature and modification mechanism. This project plans to carry out graft modification of crumb tire rubber based on the principle of the dissolution in the similar material structure and on molecular structure design. Investigate the effect of graft modification on the asphalt performance, especially on the store stability, and put forward an effective solution to solve the phase separation of crumb tire rubber modified asphalt. The Micro-structure was tested by SEM and AFM, then quantitatively analyzed through Image－Pro software. Build the relationship between compatibility and macro-properties using average area and average radius of rubber particle in asphalt as structure parameters. Establish relations between micro-structure and rheoligical property based on rheology theory and model of concentrated suspensions, explain the change of asphalt performance before and after modification with crumb tire rubber in theory, reveal the modification mechanism and provide science basis for the development of crumb tire rubber modified asphalt.