The invention relates to the technical field of pavement construction, and concretely relates to a rock
asphalt fluid fine
grinding, modifying and mixing process. A rock
asphalt fluid is prepared from the following components: 38 to 43 parts of rock
asphalt, 22 to 30 parts of matrix asphalt, 16 to 23 parts of kieselguhr, 12 to 20 parts of
sodium tetrapolyphosphate, 8 to 15 parts of kaolin, and 5 to 12 parts of surface
active agent. According to the rock asphalt fluid fine
grinding, modifying and mixing process provided by the invention, the
sodium tetrapolyphosphate, the kaolin and the matrix asphalt are used as raw materials for preparing the rock asphalt, and the
oil content in the rock asphalt is gradually oxidized and transformed into
asphaltene, so that the
viscosity of the rock asphalt is increased, and meanwhile, a high temperature performance of the rock asphalt is also improved; through the mixed use of the kieselguhr and the kaolin, the high-temperature stability and the low-temperature
cracking resistance of the rock asphalt can be improved, so that a
viscoelasticity range of the rock asphalt is increased, the temperature sensibility is reduced, and meanwhile, the
ageing resistance and the
fatigue resistance of the rock asphalt are improved.