Water-based coating agent as well as preparation method, application and construction method thereof

The invention provides a water-based coating agent as well as a preparation method, application and a construction method thereof, and the water-based coating agent comprises acrylic emulsion resin, water, titanium dioxide, ceramic glass beads, calcium carbonate, silicon dioxide, kaolin and talcum powder. Wherein the percentages of the acrylic emulsion resin, the water, the titanium dioxide, the ceramic glass beads, the calcium carbonate, the silicon dioxide, the kaolin and the talcum powder are respectively 30%-48%, 5%-10%, 2%-10%, 10%-18%, 2%-3%, 5%-10%, 1%-3% and 2%-5%. The water-based coating agent prepared by the invention is applied to a pipe structure, air and water between the inner wall and the outer wall of the pipe can be effectively isolated, so that the pipe structure has a good heat insulation effect and a good heat preservation effect, and meanwhile, the water-based coating agent can also achieve a good heat preservation effect when being applied to a building wall. And the flame-retardant grad