The invention discloses
asphalt mixture modifier particles and a preparation method thereof. The preparation method includes the steps that a
raw material SBS and a scorch
retarder are mixed to be uniform at normal temperature, and a first mixture is prepared; then heating melting treatment is carried out; a cross-linking agent and an
accelerant are added at the later stage of heating melting treatment, and a second mixture is prepared; then
extrusion treatment is carried out to obtain strip-shaped materials; the strip-shaped materials are chopped, and the
asphalt mixture modifier particles are obtained. The
asphalt mixture modifier particles are prepared from, by weight, 90-97 parts of SBS, 0.3-3 parts of scorch
retarder, 0.4-5 parts of cross-linking agent and 1-5 parts of
accelerant. According to the
granulation process, SBS and the cross-linking agent are not cross-linked at the
granulation process stage, when SBS and the cross-linking agent are added into an asphalt mixture, under the effect of shear dispersion of high-temperature stone, a cross-linking reaction is generated while swelling dispersion is carried out, a net-shaped structure is formed, asphalt is evenly wrapped by the net-shaped structure, and the high-low-temperature performance, the
aging resistance, mechanical performance and the like of an SBS modified
asphalt concrete system can be improved.