Inorganic aggregate polyurethane (PU) terrazzo flooring, and preparation method and use thereof

An inorganic aggregate polyurethane (PU) terrazzo flooring, comprising a PU substrate layer, an inorganic aggregate PU terrazzo layer, and a PU transparent surface layer from inside to outside in sequence, wherein

• the PU substrate layer has a thicknesses of 0.5 mm, and the PU transparent surface layer has a thicknesses of 0.1 mm,
• the inorganic aggregate PU terrazzo layer has a thickness of 10 mm to 50 mm and a density of 1.6 kg/m2/mm to 2 kg/m2/mm, and
• the inorganic aggregate PU terrazzo layer is prepared by paving a polyol PU self-leveling coating, a diisocyanate curing agent, and an inorganic aggregate at a mass ratio of 1:1.25:6, wherein
• the inorganic aggregate is one or a combination of two or more selected from the group consisting of recycled glass, a marble powder, and stone that are regularly shaped;
• and
• the polyol PU self-leveling coating comprises 95% of a polyol PU resin and 5% of a functional additive by mass percentage, the polyol PU resin comprising 45% to 50% of a plant polyol, 40% to 45% of a diisocyanate, and 5% to 15% of a pigment by mass percentage, and the functional additive comprising a leveling agent, a defoamer, and a wetting agent at a mass ratio of 1:1:0.5.