The invention relates to a warm-mixed
asphalt mixture and a preparation method thereof. The warm-mixed
asphalt mixture is mainly applied to new construction and maintenance of high-grade roads and common roads, and is particularly suitable for cities, parks, tunnels and the like with high environmentally-friendly requirements. The warm-mixed
asphalt mixture mainly comprises about 92.4-96.5 percent by weight of mineral, about 3.4-7.5 percent by weight of asphalt
cement and 0.05-1.0 percent by weight of chemical modified
adhesive cement. The preparation method comprises the following steps of: simultaneously pumping the chemical modified
adhesive cement and the hot asphalt cement to the spraying port of a foam generator, fully mixing to generate a foam-containing hot asphalt mixture, spraying the foam-containing hot asphalt mixture into a mixing pan, and further mixing the foam-containing hot asphalt mixture and the hot mineral to form the warm-mixed asphalt mixture. The chemical modified
adhesive cement can effectively reduce the mixing, spreading and rolling temperature of the asphalt mixture, and solves the problems of environmental
pollution,
high energy consumption, asphalt
ageing regression and the like. By selecting high-concentration cationic chemical modified latex as a matrix stock of the chemical modified
adhesive cement and simultaneously matching a proper proportion of cationic surfactant with lubricating effect and peeling resistance, the influence of the conventional warm-mixed asphalt additive on poor reducing performance and poor adhesive performance of the asphalt cement is solved, and the properties of the warm-mixed asphalt mixture such as
water damage resistance, rutting resistance,
fatigue resistance, low
temperature resistance and the like are improved.