Ultraviolet-resistant and high-effective-content cationic emulsified asphalt and preparation method thereof

The invention discloses ultraviolet-resistant and high-effective-content cationic emulsified asphalt. The ultraviolet-resistant and high-effective-content cationic emulsified asphalt is prepared fromthe compositions in percentage by mass: 60%-70% of matrix asphalt, 26%-37% of water, 1.0%-2.0% of an emulsifier, 1.5%-2.0% of an ultraviolet absorbent and 0%-0.5% of a pH value regulator, wherein thematrix asphalt is No.70 or No.90, the emulsifier is chitosan modified by 2,3-glycidyl octadecyl dimethyl ammonium chloride, and the ultraviolet absorbent is metal oxide nanoparticles modified by a coupling agent. The ultraviolet-resistant capacity of the emulsified asphalt is enhanced, the service life of an asphalt pavement after slurry surfacing is effectively prolonged, and performance of the asphalt pavement after slurry surfacing is effectively improved. 一种抗紫外高有效含量阳离子乳化沥青，该阳离子乳化沥青的组成的质量百分含量包括：基质沥青：60%-70%；水：26%-37%；乳化剂：1.0%-2.0%；紫外线吸收剂：1.5%-2.0%；pH值调节剂：0%-0.5%；所述的基质沥青为70号或90号沥青。所述的乳化剂为2,3-环氧丙基十八烷基二甲基氯化铵改性的壳聚糖。所述的紫