Adhesive layer emulsified asphalt and preparation method thereof

The invention relates to an adhesive layer emulsified asphalt and a preparation method thereof. The emulsified asphalt comprises the following components in percentage by weight: 40%-60% of low mark number asphalt, 0-3% of an emulsification promoting additive, 0-3% of a modifier, 0.2%-2% of an asphalt emulsifier, 0.2%-2% of an acid-base modifier and the balance of water. The preparation method comprises the following steps: firstly preparing two intermediate materials, namely easily emulsified and modified low mark number asphalt and liquid soap, and then performing high-speed grinding on the intermediate materials to form unsteady emulsified asphalt; finally performing constant-temperature stirring on the unsteady emulsified asphalt to obtain the adhesive layer emulsified asphalt. The adhesive layer emulsified asphalt has the benefits of high demulsification speed and quick forming, and thus the construction efficiency is greatly improved; the adhesive layer emulsified asphalt is of a non-sticking characteristic, the damage of construction equipment and transport vehicles to an adhesive layer material is avoided, the adhesive efficiency and adhesive strength are improved, and thus the durability of road surfaces is improved; the asphalt is high in high temperature performance; meanwhile, the technology is simple and practical, and is beneficial to popularization and application.