SBR COMPOSITE PARTICLE MODIFIED ASPHALT AND PREPARATION METHOD THEREOF

摘要

The invention is directed to an SBR composite particle modified asphalt and a preparation method thereof. The SBR composite particle modified asphalt comprises the following components by weight percent: heavy traffic asphalt: 90-98, and modified composite particles: 2-10. The modified composite particles are obtained by Banbury mixing and granulating SBS, carbon black, SBR and calcium carbonate, wherein the ratio of the weight percentages of SBR/SBS is 70/10-50/30. The SBR composite particle modified asphalt prepared by the invention has the characteristics of high adhesive force, stable thermal storage and excellent high and low temperature performance. Particularly, it exhibits favorable ultraviolet aging in regions with low temperatures and high ultraviolet radiation, this quality being absent in SBS modified asphalt and matrix petroleum asphalt. Compared with traditional SBR modified asphalt production, the invention has the advantages of simple process route, low costs, and good stability of raw materials, and it is particularly suitable for promoting production in the Tibet region.