Rubber modified asphalt and preparation method thereof

The invention provides rubber modified asphalt and a preparation method thereof. The rubber modified asphalt comprises the following components: matrix asphalt, rubber particles and water-absorbent resin, wherein the mass ratio of the matrix asphalt to the rubber particles to the water-absorbent resin is 100: (5-15): (3-5). The preparation method comprises the following steps: heating the asphalt, adding the rubber particles and the water-absorbent resin into the matrix asphalt according to a certain mass ratio, and shearing in a high-speed shearing machine to prepare the rubber modified asphalt, and compared with the matrix asphalt, the water-absorbent resin modified rubber asphalt has better self-healing property and mechanical property. And the pavement material can absorb water and expand, and provides a basis for functional pavement development. 本发明提供一种橡胶改性沥青及其制备方法，其组分包括基质沥青、橡胶颗粒和吸水树脂；其中，基质沥青、橡胶颗粒和吸水树脂质量比为100：(5～15)：(3～5)。制备方法是将沥青加热后，将橡胶颗粒和吸水树脂按照一定质量比例加入基质沥青中，置于高速剪切机中剪切，制备出一种橡胶改性沥青，相比于基质沥青，利用吸水树脂改性的橡胶沥青具