The present invention relates to an exposed water-based
asphalt-based waterproof
coating material and a preparation method therefor, and a waterproof laminate. The exposed water-based
asphalt-based waterproof
coating material comprises anionic emulsified
asphalt, a
polymer emulsion, a filler, and an auxiliary agent, wherein the anionic emulsified asphalt is prepared by melt-blending matrix asphalt with a composite weather-resistant additive and then emulsifying the resulting blend. The composite weather-resistant additive is a combination of an
antioxidant and an
ultraviolet absorbent in a
mass ratio of 0.5-2:1, and the
polymer emulsion is one of or a combination of more than one of a weather-resistant
styrene-acrylic
emulsion, a weather-resistant pure acrylic emulsion, and a weather-resistant
silicone acrylic emulsion. By introducing the
antioxidant and the
ultraviolet absorbent into the anionic emulsified asphalt, the present invention improves the stability of a waterproof
coating material system and avoids a demulsification phenomenon; moreover, by using a weather-resistant
polymer emulsion in combination with a filler and an auxiliary agent, the
weather resistance of the prepared waterproof coating material is greatly improved; furthermore, by means of the protective effect and the
sunlight reflecting effect of white sintered sand adhered to a surface of the coating material, the waterproof
system can be used as an exposed product for waterproof construction of buildings that have been in exposed environments for a long time.