Fly-ash-base geopolymer fire-retardant paint and preparation method thereof

The invention discloses a fly-ash-base geopolymer fire-retardant paint and a preparation method thereof. The fly-ash-base geopolymer fire-retardant paint comprises the following components in parts by weight: 30-40 parts of alkali excitant, 40-50 parts of fly ash, 0-15 parts of metakaolin, 0.02-0.04 part of dispersing agent, 0.03-0.05 part of defoaming agent, 10-20 parts of light calcium carbonate powder, 0.5-0.8 part of flame retardant, 0.02-0.04 part of thickener, 1.0-1.5 parts of polymer emulsion and 10-20 parts of water. The fly-ash-base geopolymer fire-retardant paint solves the technical problems in the traditional fire-retardant paint for steel structures, has the advantages of simple preparation technique, high durability, low cracking and shedding tendency, environment friendliness, no toxicity and high drying rate, and can be used for inside and outside protection of steel structure buildings. The fly-ash-base geopolymer fire-retardant paint effectively utilizes the fly ash, phosphogypsum and other