Preparation method of rubber asphalt suitable for road pavements in large-temperature difference environment

The invention discloses a preparation method of rubber asphalt suitable for road pavements in a large-temperature difference environment. The method comprises the following steps: 1, taking and processing scrapped all-steel truck radical tires to form rubber powder; 2, heating asphalt to 145-155 DEG C, uniformly adding the rubber powder to the asphalt according to a mass ratio of (18-28):100, and heating the asphalt to 165-175 DEG C to make the rubber powder fully dispersed in the asphalt; 3, pumping the obtained asphalt into a high speed shearer, slowly heating the asphalt to 200 DEG C, and shearing the heated asphalt; and 4, pumping the sheared asphalt into a 150 DEG C growth tank, and continuously growing the sheared asphalt to obtain the finished rubber asphalt. The preparation method is simple, and the prepared rubber asphalt has an ultrahigh resistance to a high temperature and a low temperature in the large-temperature difference environment, can effectively solve the problems of easy aggregate spallin