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本文主要研究橡胶沥青体系的流变特性与相容-共混特性,利用常规物理指标、流变测试、多应力重复蠕变回复等方法对一系列胶粉沥青进行了检测和指标分析,利用了Cole-cole图和荧光显微镜分析了胶粉沥青的相容-共混机制。结果表明,10%以下的胶粉掺量可以做到改性沥青体系的整体相容,但是过高的胶粉掺量则只能使胶粉颗粒分散于基质沥青中,并形成一定的空间结构,从而改善沥青的弹性能力。这种相容-分散的临界掺量与基质沥青的四组分含量、溶解能力有关;当胶粉量超过沥青的溶解能力后,胶粉沥青体系仅为一个物理共混的体系,这是目前工程应用中常见橡胶沥青最大微观特征。
In this paper, the rheological properties and compatibility-blending properties of rubber asphalt systems are studied. A series of rubber powder asphalt samples are tested and indexed by conventional physical indexes, rheological tests and multi-stress repeated creep recovery. Cole-cole diagram and fluorescence microscope were used to analyze the compatibility-blending mechanism of rubber powder asphalt. The results show that the content of cement powder below 10% can be conformed to the overall compatibility of the modified asphalt system, but the excess cement powder content can only disperse the powder particles in the matrix asphalt and form a certain spatial structure , Thereby improving the flexibility of asphalt. The critical content of compatibilizing and dispersing is related to the content of four components of matrix asphalt and the dissolving ability. When the amount of rubber powder exceeds the dissolving ability of asphalt, the asphalt powder system is only a physically blended system, which is currently Common application of rubber asphalt in the most common microscopic features.